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Journal articles on the topic 'Chemisorbed'

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Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

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1

Varakin, V. N., and A. P. Simonov. "UV Laser Induced Chemistry of Adsorbed Dimethylcadmium." Laser Chemistry 12, no. 3-4 (January 1, 1992): 181–97. http://dx.doi.org/10.1155/lc.12.181.

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The UV laser chemistry of dimethylcadmium (DMCd) either chemisorbed at 297 K on n-type Si(100) with native oxide or physisorbed at 150 K on a photodeposited cadmium film has been studied by using mass spectrometry of desorbed species. A XeCl laser induced the heterogeneous fragmentation of these chemisorbed molecules as well as the desorption of DMCd, Cd, and CH3. The resonant absorption of a KrCl laser radiation by adsorbed DMCd led to their photolysis and the ejection of DMCd and its fragments in both neutral and ionic forms. The kinetic, laser fluence, and time-of-flight dependences of desorbed species have been measured to elucidate the mechanisms of the dissociative and desorption processes either induced by lasers or occurring spontaneously. The effects of these lasers on chemisorbed DMCd as well as KrCl laser assisted processes in chemisorbed and physisorbed molecules have been compared.

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2

Bosáček, Vladimír, Stanislav Vratislav, and Mája Dlouhá. "Bridging Methoxy Groups in NaY, NaX and NaLSX Zeolites." Collection of Czechoslovak Chemical Communications 69, no. 8 (2004): 1537–52. http://dx.doi.org/10.1135/cccc20041537.

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Distribution of chemisorbed methyl groups and sodium cations in the structure of NaY, NaX and NaLSX zeolites was estimated by neutron diffraction. Chemisorbed methyl groups were prepared in the structure by reaction of methyl iodide with reactive sodium cations available in SII and SIII positions of faujasites. Methyl cations CH3+, formed in the reaction, react immediately with the lattice oxygen forming surface bonded methyl groups in bridging configuration. 13C NMR signals of chemisorbed surface species and their linear dependence on the intermediate electronegativity of the zeolite lie in the interval from 53 ppm for most basic CsLSX to 58 ppm TMS for stabilized and acid leached sample of H,NaY-St. Changes in the distribution of structural sodium cations in the lattice after chemisorption of methyl cations have been detected. C-O distances in surface methoxy groups in void cavities were longer than in ordinary crystalline organometallic compounds with bridging methoxy groups. The location of chemisorbed methyl groups at the O1 lattice oxygen type was most probable for NaY. Nuclear densities of chemisorbed methyl groups were detected in NaX at O1 and at O4 lattice oxygens. The origin of the split signal at 58 ppm on NaX and NaLSX samples has been discussed.

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3

CARBONE, MARILENA, and RUGGERO CAMINITI. "ADSORPTION STATES AND SITE CONVERSIONS OF PHENYLACETYLENE ON Si(100)2 × 1 CALCULATED BY DFT." Journal of Theoretical and Computational Chemistry 11, no. 05 (October 2012): 1089–99. http://dx.doi.org/10.1142/s0219633612500721.

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The adsorption on Si(100)2 × 1 of PhenylAcetilene (PA), a bifunctional molecule with a phenyl ring and a triple bond, may occur through each group, selectively, or both functional groups simultaneously. The most favorable adsorption sites upon adsorption were calculated by DFT. Furthermore, several energy barriers were calculated: The ones connecting the physisorbed to the chemisorbed states, as well as the interconversion barriers of different chemisorbed states. The conversion of physisorbed-to-chemisorbed states has barriers of 0.11–0.19 eV. The barriers of sites inter-conversions are all higher (1.11–1.36 eV) and suggest a difficult post-chemisorption surface rearrangement.

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4

Li, Qingbin, and Allan LL East. "Catalyzed β scission of a carbenium ion Mechanistic differences from varying catalyst basicity." Canadian Journal of Chemistry 83, no. 8 (August 1, 2005): 1146–57. http://dx.doi.org/10.1139/v05-135.

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The β-scission mechanism of physisorbed and chemisorbed pentenium ions, as catalyzed by AlH2(OH)2 and by AlHCl3 anions, was investigated using density functional theory computations and explicit-contact modelling. A thorough search of intermediates was performed for each catalyst. On the aluminum chloride, β scission of an aliphatic, secondary carbenium ion featured chemisorbed and physisorbed ion intermediates, while on the aluminum hydroxide, β scission featured chemisorbed ions but physisorbed neutral species. The importance of this work is its demonstration of a qualitatively different mechanism, with qualitatively different intermediates, due only to the different basicity of the two catalysts.Key words: CC bond fission, β scission, carbenium ion, catalysis, mechanism.

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5

Böhlin, Johan, Mikael Unge, and Sven Stafström. "TDAE chemisorbed on gold." Journal of Physics: Condensed Matter 20, no. 31 (July 8, 2008): 315008. http://dx.doi.org/10.1088/0953-8984/20/31/315008.

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6

Richardson, N. V. "Identification of chemisorbed molecules." Catalysis Today 12, no. 4 (February 1992): 401–7. http://dx.doi.org/10.1016/0920-5861(92)80055-r.

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7

Black, Jana E., Andrew Z. Summers, Christopher R. Iacovella, Peter T. Cummings, and Clare McCabe. "Investigation of the Impact of Cross-Polymerization on the Structural and Frictional Properties of Alkylsilane Monolayers Using Molecular Simulation." Nanomaterials 9, no. 4 (April 19, 2019): 639. http://dx.doi.org/10.3390/nano9040639.

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Cross-linked chemisorbed n-alkylsilane (CH3(CH2)n−1Si(OH)3) monolayers on amorphous silica surfaces have been studied and their structural properties and frictional performance were compared to those of equivalent monolayers without cross-linkages. The simulations isolated for the first time the effects of both siloxane cross-linkages and the fraction of chains chemisorbed to the surface, providing insight into a longstanding fundamental question in the literature regarding molecular-level structure. The results demonstrate that both cross-linkages and the fraction of chemisorbed chains affect monolayer structure in small but measurable ways, particularly for monolayers constructed from short chains; however, these changes do not appear to have a significant impact on frictional performance.

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8

Blyholder, G., and L. Orji. "Infrared Diffuse Reflectance Spectra of CO, H2, C2H4, and C2H5OH Adsorbed on Alumina Supported Rh." Adsorption Science & Technology 4, no. 1-2 (March 1987): 1–13. http://dx.doi.org/10.1177/0263617487004001-201.

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Infrared spectra of CO, H2, C2H4, and C2H5OH adsorbed on rhodium supported on alumina have been obtained by a diffuse reflectance technique using a Fourier Transfor spectrometer. In the temperature range from 523K to 673K surface water or hydroxyl groups can oxidize metallic Rh particles to give Rh in a positive oxidation state as indicated by the the infrared spectrum of chemisorbed CO. Reduction in H2 at either lower or higher temperatures produces metallic Rh particles that chemisorb CO to produce broad bands for both linear and bridge bonded CO characteristic of metallic Rh particles. Aside from chemisorbed CO, the most conspicuous surface species formed during CO hydrogenation on Rh/A12O3 is a surface acetate. Ethene has two main reactions with Rh/A12O3; one to produce a surface ethylidyne and the other to produce gas phase ethane. The main interactions of ethanol with the Rh/A12O3 are to produce a surface acetate and to decompose to produce gas phase methane. In the presence of CO the ethene reacts with surface oxygen to give a surface acetate. In no case could a surface species be found that could be identified as an intermediate in CO hydrogenation to hydrocarbons. No surface species were found that could be assigned as CO insertion products with ethene or ethanol to give C3 molecules.

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9

Kokalj, Anton. "Corrosion inhibitors: physisorbed or chemisorbed?" Corrosion Science 196 (March 2022): 109939. http://dx.doi.org/10.1016/j.corsci.2021.109939.

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10

Frøyen, S., S. Holloway, J. K. Nørskov, and Bulbul Chakraborty. "Quantum motion of chemisorbed hydrogen." Journal of Electron Spectroscopy and Related Phenomena 38 (January 1986): 313–15. http://dx.doi.org/10.1016/0368-2048(86)85103-9.

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11

Nicol, Jacqueline M. "Chemisorbed hydrogen and hydrogenous molecules." Spectrochimica Acta Part A: Molecular Spectroscopy 48, no. 3 (March 1992): 313–27. http://dx.doi.org/10.1016/0584-8539(92)80061-z.

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12

WANG, LAI-SHENG, JIAWEN FAN, and LIANG LOU. "IRON CLUSTERS AND OXYGEN-CHEMISORBED IRON CLUSTERS." Surface Review and Letters 03, no. 01 (February 1996): 695–99. http://dx.doi.org/10.1142/s0218625x9600125x.

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The photoelectron spectroscopy of size-selected [Formula: see text](n=3–24) clusters and oxygen-chemisorbed clusters Fe n O −(n=1–16), has been studied at 3.49-eV photon energy with a magnetic-bottle time-of-flight photoelectron spectrometer. While the spectra of the pure iron clusters show rather sharp features in the whole size range, those of the oxygen-chemisorbed species are considerably different, with extensive sharp structures observed for n only up to 6. The electron affinities (EAs) of both the bare and chemisorbed clusters exhibit strong size variations. However, the first oxygenation of the iron clusters induces a systematic lowering of EA in the size range n=9–15. Towards a complete molecular picture of these interesting clusters, density-functional calculations are being performed to determine the equilibrium cluster structures, oxygen chemisorption sites, and their electronic structures. The equilibrium structures obtained for Fe n O with n=2–6 are reported.

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13

González, César, Blanca Biel, and Yannick J. Dappe. "Adsorption of small inorganic molecules on a defective MoS2monolayer." Physical Chemistry Chemical Physics 19, no. 14 (2017): 9485–99. http://dx.doi.org/10.1039/c7cp00544j.

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14

Martínez-Galera, A. J., U. A. Schröder, F. Huttmann, W. Jolie, F. Craes, C. Busse, V. Caciuc, N. Atodiresei, S. Blügel, and T. Michely. "Oxygen orders differently under graphene: new superstructures on Ir(111)." Nanoscale 8, no. 4 (2016): 1932–43. http://dx.doi.org/10.1039/c5nr04976h.

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15

Palaniappan, N., I. S. Cole, and A. E. Kuznetsov. "Experimental and computational studies of graphene oxide covalently functionalized by octylamine: electrochemical stability, hydrogen evolution, and corrosion inhibition of the AZ13 Mg alloy in 3.5% NaCl." RSC Advances 10, no. 19 (2020): 11426–34. http://dx.doi.org/10.1039/c9ra10702a.

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16

Krzyżek, Paweł, Grażyna Gościniak, Karol Fijałkowski, Paweł Migdał, Mariusz Dziadas, Artur Owczarek, Joanna Czajkowska, Olga Aniołek, and Adam Junka. "Potential of Bacterial Cellulose Chemisorbed with Anti-Metabolites, 3-Bromopyruvate or Sertraline, to Fight against Helicobacter pylori Lawn Biofilm." International Journal of Molecular Sciences 21, no. 24 (December 14, 2020): 9507. http://dx.doi.org/10.3390/ijms21249507.

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Helicobacter pylori is a bacterium known mainly of its ability to cause persistent inflammations of the human stomach, resulting in peptic ulcer diseases and gastric cancers. Continuous exposure of this bacterium to antibiotics has resulted in high detection of multidrug-resistant strains and difficulties in obtaining a therapeutic effect. The purpose of the present study was to determine the usability of bacterial cellulose (BC) chemisorbed with 3-bromopyruvate (3-BP) or sertraline (SER) to act against lawn H. pylori biofilms. The characterization of BC carriers was made using a N2 adsorption/desorption analysis, tensile strength test, and scanning electron microscopy (SEM) observations. Determination of an antimicrobial activity was performed using a modified disk-diffusion method and a self-designed method of testing antibacterial activity against biofilm microbial forms. In addition, bacterial morphology was checked by SEM. It was found that BC disks were characterized by a high cross-linking and shear/stretch resistance. Growth inhibition zones for BC disks chemisorbed with 2 mg of SER or 3-BP were equal to 26.5–27.5 mm and 27–30 mm, respectively. The viability of lawn biofilm H. pylori cells after a 4-h incubation with 2 mg SER or 3-BP chemisorbed on BC disks was ≥4 log lower, suggesting their antibacterial effect. SEM observations showed a number of morphostructural changes in H. pylori cells exposed to these substances. Concluding, SER and 3-BP chemisorbed on BC carriers presented a promising antibacterial activity against biofilm H. pylori cells in in vitro conditions.

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17

Palaniappan, N., I. S. Cole, A. E. Kuznetsov, Balasubramanian K., and K. R. Justin Thomas. "Experimental and computational studies of a graphene oxide barrier layer covalently functionalized with amino acids on Mg AZ13 alloy in salt medium." RSC Advances 9, no. 56 (2019): 32441–47. http://dx.doi.org/10.1039/c9ra06549k.

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18

TARANKO, EWA, and RYSZARD TARANKO. "THEORY OF CHEMISORPTION ON METAL SURFACES AT FINITE SUBMONOLAYER COVERAGES." International Journal of Modern Physics B 08, no. 14 (June 30, 1994): 1893–907. http://dx.doi.org/10.1142/s0217979294000786.

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A chemisorption theory of hydrogen-like atoms on metal surfaces at submonolayer coverages, based on the generalized Anderson-Newns Hamiltonian and Green’s Function formalism, is presented. A very general Hamiltonian with the terms proportional to three and four adion number operators was derived. The utility of this Hamiltonian in the context of the lattice gas model of the chemisorbed layer with non-additive lateral interactions is discussed. The coverage-dependence of the electronic structure of chemisorbed adlayer is investigated. It is shown, that the adatom ionization level’s self-energy is evidently coverage dependent as opposite to this one corresponding to the affinity level.

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19

Delgado-Jimenez, N., M. Canales-Lizaola, J. M. Ramirez-De-Arellano, and L. F. Magana. "Adsorption of NO and NO₂ on a M-doped graphene+ semifullerene (C₃₀) surface (M= Ti, Pt, Li): a DFT study." Journal of Physics: Conference Series 2307, no. 1 (September 1, 2022): 012048. http://dx.doi.org/10.1088/1742-6596/2307/1/012048.

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Abstract In this study Density Functional Theory (DFT) was used to explore the adsorption of NO, and NO2 molecules on a carbon nanostructure formed by an hexagonal semi-fullerene (C30) chemisorbed in a graphene layer doped with titanium, platinum or lithium. The NO molecule is chemisorbed for the Pt-doped system, with an adsorption energy of -4.28 eV. For the Ti-doped system, the NO molecule is physisorbed, with an energy of -0.401 eV. Finally, we found that the NO 2 molecule is physisorbed by the Li-doped system, with an adsorption energy of -0.163 eV.

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20

He, Jing Hui, Wei Mao, Wei Chen, Kai Wu, Han Song Cheng, and Guo Qin Xu. "Resolving molecular orbitals self-decoupled from semiconductor surfaces." Chem. Sci. 5, no. 11 (2014): 4447–52. http://dx.doi.org/10.1039/c4sc01293c.

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21

Baetzold, R. C. "Properties of chemisorbed ethylene and butadiene." Langmuir 3, no. 2 (March 1987): 189–97. http://dx.doi.org/10.1021/la00074a008.

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22

Pimbley, J. M., T. ‐M Lu, and G. ‐C Wang. "Island coalescence in a chemisorbed overlayer." Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films 4, no. 3 (May 1986): 1357–61. http://dx.doi.org/10.1116/1.573570.

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23

Bartolucci, F., R. Franchy, J. C. Barnard, and R. E. Palmer. "Two Chemisorbed Species ofO2on Ag(110)." Physical Review Letters 80, no. 23 (June 8, 1998): 5224–27. http://dx.doi.org/10.1103/physrevlett.80.5224.

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24

Vratislav, S., M. Dlouhá, and V. Bosácek. "Zeolitic catalysts with chemisorbed methyl groups." Acta Crystallographica Section A Foundations of Crystallography 56, s1 (August 25, 2000): s389. http://dx.doi.org/10.1107/s0108767300028129.

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25

Patrito, E. M., P. Paredes Olivera, and Harrell Sellers. "The nature of chemisorbed hydroxyl radicals." Surface Science 306, no. 3 (April 1994): 447–58. http://dx.doi.org/10.1016/0039-6028(94)90085-x.

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26

Ryberg, R. "Vibrational line shape of chemisorbed CO." Physical Review B 32, no. 4 (August 15, 1985): 2671–73. http://dx.doi.org/10.1103/physrevb.32.2671.

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27

Christmann, K. "Phase Transitions in Chemisorbed Hydrogen Layers." Berichte der Bunsengesellschaft für physikalische Chemie 90, no. 3 (March 1986): 307–16. http://dx.doi.org/10.1002/bbpc.19860900331.

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28

Yates, John T. "Bond directionality in chemisorbed species (invited)." Surface and Interface Analysis 10, no. 2-3 (March 1987): 168. http://dx.doi.org/10.1002/sia.740100218.

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29

Satyanarayana, Nalam, Sujeet K. Sinha, and Seh-Chun Lim. "Highly wear resistant chemisorbed polar ultra-high-molecular-weight polyethylene thin film on Si surface for micro-system applications." Journal of Materials Research 24, no. 11 (November 2009): 3331–37. http://dx.doi.org/10.1557/jmr.2009.0397.

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We report deposition and tribological studies of a chemisorbed UHMWPE (ultra-high-molecular-weight polyethylene) film on an Si surface. UHMWPE molecules containing carboxyl and hydroxyl chemical groups were chemisorbed onto an Si surface using an intermediate GPTMS SAM (glycidoxypropyltrimethoxy silane self-assembled monolayer) layer. The carboxyl and hydroxyl groups of UHMWPE molecules react with the terminal epoxy groups of GPTMS SAM during chemisorption. The resultant film (∼1.4 µm thick) has shown low coefficient of friction (∼0.1) and high wear life (exceeding 100,000 cycles) in a sliding test against a 4 mm diameter Si3N4 ball at a normal load of 0.3 N and a sliding velocity of 0.042 m/s measured on a micro-tribometer. In contrast, bare Si or GPTMS SAM modified Si has shown a higher coefficient of friction and failed within a few tens of sliding cycles. The high wear durability of the chemisorbed polymer film is attributed to the excellent adhesion of the UHMWPE film with the substrate due to chemisorption and to the good lubrication properties of UHMWPE molecules. This wear resistant film has potential applications in micro-electro-mechanical systems made of Si.

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30

Waheed, Ammara, Changhai Cao, Yifei Zhang, Kai Zheng, and Gao Li. "Insight into Au/ZnO catalyzed aerobic benzyl alcohol oxidation by modulation–excitation attenuated total reflection IR spectroscopy." New Journal of Chemistry 46, no. 11 (2022): 5361–67. http://dx.doi.org/10.1039/d2nj00176d.

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31

Palaniappan, N., I. S. Cole, F. Caballero-Briones, S. Manickam, C. Lal, and J. Sathiskumar. "Neodymium-decorated graphene oxide as a corrosion barrier layer on Ti6Al4V alloy in acidic medium." RSC Advances 9, no. 15 (2019): 8537–45. http://dx.doi.org/10.1039/c9ra00106a.

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32

Cui, Zhiqing, Hongjian Zhou, Guozhong Wang, Yunxia Zhang, Haimin Zhang, and Huijun Zhao. "Enhancement of the visible-light photocatalytic activity of CeO2 by chemisorbed oxygen in the selective oxidation of benzyl alcohol." New Journal of Chemistry 43, no. 19 (2019): 7355–62. http://dx.doi.org/10.1039/c9nj01098j.

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33

Núñez, J. D., A. M. Benito, S. Rouzière, P. Launois, R. Arenal, P. M. Ajayan, and W. K. Maser. "Graphene oxide–carbon nanotube hybrid assemblies: cooperatively strengthened OH⋯OC hydrogen bonds and the removal of chemisorbed water." Chemical Science 8, no. 7 (2017): 4987–95. http://dx.doi.org/10.1039/c7sc00223h.

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34

Kapica-Kozar, Joanna, Beata Michalkiewicz, Rafal J. Wrobel, Sylwia Mozia, Ewa Piróg, Ewelina Kusiak-Nejman, Jarosław Serafin, Antoni W. Morawski, and Urszula Narkiewicz. "Adsorption of carbon dioxide on TEPA-modified TiO2/titanate composite nanorods." New Journal of Chemistry 41, no. 16 (2017): 7870–85. http://dx.doi.org/10.1039/c7nj01549f.

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35

Muniz-Miranda, Maurizio, Francesco Muniz-Miranda, and Alfonso Pedone. "Raman and DFT study of methimazole chemisorbed on gold colloidal nanoparticles." Physical Chemistry Chemical Physics 18, no. 8 (2016): 5974–80. http://dx.doi.org/10.1039/c5cp07597a.

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36

Anggara, Kelvin, Lydie Leung, Matthew J. Timm, Zhixin Hu, and John C. Polanyi. "Electron-induced molecular dissociation at a surface leads to reactive collisions at selected impact parameters." Faraday Discussions 214 (2019): 89–103. http://dx.doi.org/10.1039/c8fd00137e.

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37

CAMPLIN, J. P., J. K. EVE, and E. M. McCASH. "RAIRS OF SMALL HYDROCARBONS ON Pd(100)." Surface Review and Letters 04, no. 06 (December 1997): 1371–74. http://dx.doi.org/10.1142/s0218625x97001838.

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Ethyne was seen to physisorb on the Pd(100) surface at temperatures below 210 K and chemisorb at temperatures above. Physisorbed multilayers of propyne were observed above a chemisorbed monolayer in the temperature range of 80–130 K. Both alkynes exhibited chemisorption on the Pd surface with the C ≡ C bond parallel to the surface. This led to substantial rehybridisation of the C ≡ C carbon atoms, causing the C–H and C–CH 3 bonds to tilt well away from the surface plane. Ethene was found to form physisorbed multilayers on the Pd (100) surface at temperatures between 28 and 70 K. The RAIR spectra were dominated by crystal field effects and bore a close resemblance to spectra of the crystalline solid. This indicated that the Pd(100) surface does not play a dominant role in determining the structure of the phase formed on the surface.

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38

Vempati, Sesha, Fatma Kayaci-Senirmak, Cagla Ozgit-Akgun, Necmi Biyikli, and Tamer Uyar. "Surface ionic states and structure of titanate nanotubes." RSC Advances 5, no. 101 (2015): 82977–82. http://dx.doi.org/10.1039/c5ra14323c.

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39

Hedström, Svante, Joakim Halldin Stenlid, Chang Liu, and Lars G. M. Pettersson. "Photodriven CO dimerization on Cu2O from an electronic-structure perspective." Sustainable Energy & Fuels 4, no. 2 (2020): 670–77. http://dx.doi.org/10.1039/c9se00753a.

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40

Palaniappan, N., I. Cole, F. Caballero-Briones, S. Manickam, K. R. Justin Thomas, and D. Santos. "Experimental and DFT studies on the ultrasonic energy-assisted extraction of the phytochemicals of Catharanthus roseus as green corrosion inhibitors for mild steel in NaCl medium." RSC Advances 10, no. 9 (2020): 5399–411. http://dx.doi.org/10.1039/c9ra08971c.

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41

Yang, Liu, Xiaochen You, Zhongyi Sheng, Dingren Ma, Danqing Yu, Xiang Xiao, and Sheng Wang. "The promoting effect of noble metal (Rh, Ru, Pt, Pd) doping on the performances of MnOx–CeO2/graphene catalysts for the selective catalytic reduction of NO with NH3at low temperatures." New Journal of Chemistry 42, no. 14 (2018): 11673–81. http://dx.doi.org/10.1039/c8nj01417e.

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42

Pутьков, E. B., Е. Ю. Афанасьева, Н. П. Лавровская, and H. P. Галль. "Объемные и поверхностные эффекты при образовании и разрушении графена на родии." Физика твердого тела 63, no. 10 (2021): 1711. http://dx.doi.org/10.21883/ftt.2021.10.51428.101.

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Growth and destruction of graphene islands on Rh have been studied accounting processes on the surface and in the substrate bulk simultaneously. Atomic carbon was shown to be distributed between three equilibrium phases: graphene, solid solution in the metal substrate, and chemisorbed carbon. An increase in graphene island area results in corresponding increase in carbon concentration in the solid solution and chemisorbed phase. Atomic carbon concentrations are measured for all three phases for various stages of graphene growth and decomposition. The activation energy of atomic carbon detachment from the graphene island perimeter on Rh has been determined, Edet = 2.7 eV. Surface concentration of graphene islands has been estimated to be about 1010 per сm2.

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43

Souda, Ryutaro, Takashi Aizawa, Naoyuki Sugiyama, and Masaki Takeguchi. "Nucleation and growth of water ice on oxide surfaces: the influence of a precursor to water dissociation." Physical Chemistry Chemical Physics 22, no. 36 (2020): 20515–23. http://dx.doi.org/10.1039/d0cp01897j.

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44

Skodras, Georgios, Sofia Panagiotidou, Paris Kokorotsikos, and Maria Serafidou. "Potassium catalyzed hydrogasification of low-rank coal for synthetic natural gas production." Open Chemistry 14, no. 1 (January 1, 2016): 92–109. http://dx.doi.org/10.1515/chem-2016-0009.

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AbstractPotassium catalyzed isothermal coal hydrogasification was investigated, as an alternative route for synthetic natural gas production. Potassium chemisorption occurred on oxygen sites in the coal structure and was strongly affected by the solution pH and followed the Cation Exchange Capability (CEC) which is also pH-dependent. A quadratic function described the relation between the solution pH and the fraction of the chemisorbed potassium, while; the cumulative distribution function of two Weibull probability density functions correlated the solution pH with the CEC that was linearly correlated with the fraction of the chemisorbed potassium. Coal hydrogasification is strongly affected by the increased alkalinity of the impregnating solution and increased methane yields were obtained while carbon conversion was slightly affected. This was attributed to the formation of profuse K+ substituted active sites that decompose under H2 attacks and trigger scission of the aromatic rings followed by K+ migration to neighboring complexes, thus, the hydrogasification reaction continuous to yield CH4, as codified in a three stage reaction mechanism. The relative specific hydrogasification rate was found to increase linearly with the CEC of the coal samples, suggesting that the oxygen functional groups, on which potassium is chemisorbed, act as “active sites” and are linked with the carbon’s reactivity.

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Raimondo, Corinna, Bart Kenens, Federica Reinders, Marcel Mayor, Hiroshi Uji-i, and Paolo Samorì. "Au nanoparticle scaffolds modulating intermolecular interactions among the conjugated azobenzenes chemisorbed on curved surfaces: tuning the kinetics of cis–trans isomerisation." Nanoscale 7, no. 33 (2015): 13836–39. http://dx.doi.org/10.1039/c5nr03688g.

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Hladík, Martin, Aliaksei Vetushka, Antonín Fejfar, and Héctor Vázquez. "Tuning of the gold work function by carborane films studied using density functional theory." Physical Chemistry Chemical Physics 21, no. 11 (2019): 6178–85. http://dx.doi.org/10.1039/c9cp00346k.

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Ma, Yuhui, Ting-Wing Choi, Sin Hang Cheung, Yuanhang Cheng, Xiuwen Xu, Yue-Min Xie, Ho-Wa Li, et al. "Charge transfer-induced photoluminescence in ZnO nanoparticles." Nanoscale 11, no. 18 (2019): 8736–43. http://dx.doi.org/10.1039/c9nr02020a.

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Eduok, Ubong, Omar Faye, and Jerzy Szpunar. "Corrosion inhibition of X70 sheets by a film-forming imidazole derivative at acidic pH." RSC Advances 6, no. 110 (2016): 108777–90. http://dx.doi.org/10.1039/c6ra23099g.

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49

Walck, Scott D. "Notes On Vacuum Techniques For Microscopists." Microscopy Today 2, no. 4 (July 1994): 13–14. http://dx.doi.org/10.1017/s1551929500065536.

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It was suggsted by a few that since the film is outgassing it is OK to backfill a TEM with lab air which has a high moisture content because the film in the camera chamber has a significant outgassing rate. My general comment is that you want to keep as much water and oxygen out of a vacuum system as possible. There is no need to add more to what may already be there.In a vacuum system without any leaks or severe outgassing problems and with properly cleaned surfaces, the major factor which limits the ultimate pressure and pumpdown time is the water adsorbed on the exposed surfaces of the system. Depending on the type of surface, water molecules car either adsorb or chemisorb onto the surface. A chemisorbed species is characterized by having an exchange of electrons with the atoms on the surface and will have a higher energy associated with the desorption of the molecule from the surface.

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Ramirez-de-Arellano, J. M., A. Fransuani Jiménez G., and L. F. Magaña. "Catalytic Effect of Ti or Pt in a Hexagonal Boron Nitride Surface for Capturing CO2." Crystals 11, no. 6 (June 10, 2021): 662. http://dx.doi.org/10.3390/cryst11060662.

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We investigated the effect of doping a hexagonal boron nitride surface (hBN) with Ti or Pt on the adsorption of CO2. We performed first-principles molecular dynamics simulations (FPMD) at atmospheric pressure, and 300 K. Pristine hBN shows no interaction with the CO2 molecule. We allowed the Ti and Pt atoms to interact separately, with either a B-vacancy or an N-vacancy. Both Ti and Pt ended chemisorbed on the surface. The system hBN + Ti always chemisorbed the CO2 molecule. This chemisorption happens in two possible ways. One is without dissociation, and in the other, the molecule breaks in CO and O. However, in the case of the Pt atom as dopant, the resulting system repels the CO2 molecule.

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