Accedi

Bibliografie tematiche / Oxidation reduction / Articoli di riviste

Segui questo link per vedere altri tipi di pubblicazioni sul tema: Oxidation reduction.

Articoli di riviste sul tema "Oxidation reduction"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 1 agosto 2024

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili

Scegli il tipo di fonte:

Vedi i top-50 articoli di riviste per l'attività di ricerca sul tema "Oxidation reduction".

Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.

Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.

Vedi gli articoli di riviste di molte aree scientifiche e compila una bibliografia corretta.

1

Nam, K. W., H. R. Jeong e S. H. Ahn. "VOCs Removal by Oxidation/Reduction Reaction of Cu-Doped Photocatalyst". International Journal of Chemical Engineering and Applications 7, n. 6 (dicembre 2016): 359–64. http://dx.doi.org/10.18178/ijcea.2016.7.6.605.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

2

Nan Yao and Yu Lin Hu, Nan Yao and Yu Lin Hu. "Recent Progress in the Application of Ionic Liquids in Electrochemical Oxidation and Reduction". Journal of the chemical society of pakistan 41, n. 2 (2019): 264. http://dx.doi.org/10.52568/000728/jcsp/41.02.2019.

Testo completo

Abstract (sommario):

Electrochemical oxidation and reduction, with clean power, are key to energy conversion and storage. For example, electrochemical oxidation is a determining step for fuel cells, combination of electrochemical oxidation and reduction can form a metal-air battery. Electrochemical oxidation and reduction make significant contributions to prepare valuable chemicals directly and improve yield efficiency and reduce the three wastes, which have become one of the green methodologies. Ionic liquids have attracted increasing attentions in the area of electrochemistry due to their significant properties including good chemical and thermal stability, wide liquid temperature range, considerable ionic conductivity, nonflammability, broad electrochemical potential window and tunable solvent properties. Up to now, abundant studies of ionic liquids have reported for their practical applications for electrochemical reactions. This review covers recent studies on the applications of ILs as green and universal replacements for the traditional reagents in electrochemical oxidation and reduction. The adaptabilities of ILs in these reactions are predicted as a solution to the problems of conventional electrochemical processes and to become a powerful method in electrochemical oxidation and reduction.

Gli stili APA, Harvard, Vancouver, ISO e altri

3

Hertz, Leif. "Brain Glutamine Synthesis Requires Neuronal Aspartate: A Commentary". Journal of Cerebral Blood Flow & Metabolism 31, n. 1 (10 novembre 2010): 384–87. http://dx.doi.org/10.1038/jcbfm.2010.199.

Testo completo

Abstract (sommario):

Inspired by the paper, ‘Brain glutamine synthesis requires neuronal-born aspartate as amino donor for glial glutamate formation’ by Pardo et al, a modified model of oxidation–reduction, transamination, and mitochondrial carrier reactions involved in aspartate-dependent astrocytic glutamine synthesis and oxidation is proposed. The alternative model retains the need for cytosolic aspartate for transamination of α-ketoglutarate, but the ‘missing’ aspartate molecule is generated within astrocytes during subsequent glutamate oxidation. Oxaloacetate formed during glutamate formation is used during glutamate degradation, and all transmitochondrial reactions, oxidations–reductions, and cytosolic and mitochondrial transaminations are stoichiometrically balanced. The model is consistent with experimental observations made by Pardo et al.

Gli stili APA, Harvard, Vancouver, ISO e altri

4

Cerciello, Francesca, Antonio Fabozzi, Christoph Yannakis, Sebastian Schmitt, Oğuzhan Narin, Viktor Scherer e Osvalda Senneca. "Kinetics of iron reduction upon reduction/oxidation cycles". International Journal of Hydrogen Energy 65 (maggio 2024): 337–47. http://dx.doi.org/10.1016/j.ijhydene.2024.04.008.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

5

HIROHASHI, Ryo. "Oxidation-Reduction of Organic Dyes". Journal of the Japan Society of Colour Material 64, n. 2 (1991): 92–99. http://dx.doi.org/10.4011/shikizai1937.64.92.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

6

Khandelwal, Y., G. Moraes, N. J. de Souza, H. W. Fehihaber e E. F. Paulus. "Oxidation/reduction studies with forskolin". Tetrahedron Letters 27, n. 51 (gennaio 1986): 6249–52. http://dx.doi.org/10.1016/s0040-4039(00)85444-1.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

7

Millis, Kevin K., Kim H. Weaver e Dallas L. Rabenstein. "Oxidation/reduction potential of glutathione". Journal of Organic Chemistry 58, n. 15 (luglio 1993): 4144–46. http://dx.doi.org/10.1021/jo00067a060.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

8

Schrittwieser, Joerg H., Johann Sattler, Verena Resch, Francesco G. Mutti e Wolfgang Kroutil. "Recent biocatalytic oxidation–reduction cascades". Current Opinion in Chemical Biology 15, n. 2 (aprile 2011): 249–56. http://dx.doi.org/10.1016/j.cbpa.2010.11.010.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

9

Schink, Bernhard, e Michael Friedrich. "Phosphite oxidation by sulphate reduction". Nature 406, n. 6791 (luglio 2000): 37. http://dx.doi.org/10.1038/35017644.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

10

Davis, B. G. "ChemInform Abstract: Oxidation and Reduction". ChemInform 31, n. 17 (8 giugno 2010): no. http://dx.doi.org/10.1002/chin.200017252.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

11

FLEET, G. W. J. "ChemInform Abstract: Oxidation and Reduction". ChemInform 26, n. 36 (17 agosto 2010): no. http://dx.doi.org/10.1002/chin.199536309.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

12

Davis, B. G., e J. A. G. Williams. "ChemInform Abstract: Oxidation and Reduction". ChemInform 33, n. 50 (18 maggio 2010): no. http://dx.doi.org/10.1002/chin.200250270.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

13

FLEET, G. W. J. "ChemInform Abstract: Oxidation and Reduction". ChemInform 28, n. 30 (3 agosto 2010): no. http://dx.doi.org/10.1002/chin.199730262.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

14

Banerji, K. K. "ChemInform Abstract: Oxidation and Reduction". ChemInform 44, n. 33 (25 luglio 2013): no. http://dx.doi.org/10.1002/chin.201333243.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

15

Mehrotra, R. N. "ChemInform Abstract: Oxidation and Reduction". ChemInform 42, n. 46 (20 ottobre 2011): no. http://dx.doi.org/10.1002/chin.201146254.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

16

FLEET, G. W. J. "ChemInform Abstract: Oxidation and Reduction". ChemInform 24, n. 2 (21 agosto 2010): no. http://dx.doi.org/10.1002/chin.199302301.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

17

Elema, B. "Oxidation-reduction potentials of chlororaphine". Recueil des Travaux Chimiques des Pays-Bas 52, n. 7 (3 settembre 2010): 569–83. http://dx.doi.org/10.1002/recl.19330520706.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

18

Wang, Liang, e Feng-Shou Xiao. "Methane oxidation by catalyst reduction". Nature Catalysis 6, n. 10 (23 ottobre 2023): 866–67. http://dx.doi.org/10.1038/s41929-023-01044-w.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

19

Biswas, Salah Uddin, Kripasindhu Karmakar e Bidyut Saha. "Oxidation‐reduction reactions in geochemistry". Vietnam Journal of Chemistry 59, n. 2 (aprile 2021): 133–45. http://dx.doi.org/10.1002/vjch.202000196.

Testo completo

Abstract (sommario):

AbstractThere are more than hundred elements in the periodic table and many of them are associated with various geochemical processes. Most of the elements can show more than one oxidation states, therefore, reactions involving oxidation and reduction are of very much importance in geochemistry. Since every change (chemical or physical) is associated with the change of energy, hence for every single process, there should be a reliable way for quantitative measurement of energy change. In case of any redox process, the energy change can be quantitatively expressed in terms of reduction potential of that process. For better understanding of a geochemical process, previously known reduction potentials can be used. The main importance of reduction potentials in geochemistry is for understanding the frequent concentration and enrichment of various elements in deposits formed under extremely reducing or oxidizing conditions.

Gli stili APA, Harvard, Vancouver, ISO e altri

20

Paul, Amal. "Oxidation-reduction equilibrium in glass". Journal of Non-Crystalline Solids 123, n. 1-3 (agosto 1990): 354–62. http://dx.doi.org/10.1016/0022-3093(90)90808-y.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

21

FLEET, G. W. J. "ChemInform Abstract: Oxidation and Reduction". ChemInform 22, n. 32 (22 agosto 2010): no. http://dx.doi.org/10.1002/chin.199132283.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

22

Emerenciano, Vicente P., D. Cabrol-Bass, Marcelo J. P. Ferreira, Sandra A. V. Alvarenga, Antonio J. C. Brant, Marcus T. Scotti e Karina O. Barbosa. "Chemical Evolution in the Asteraceae. The Oxidation– Reduction Mechanism and Production of Secondary Metabolites". Natural Product Communications 1, n. 6 (giugno 2006): 1934578X0600100. http://dx.doi.org/10.1177/1934578x0600100612.

Testo completo

Abstract (sommario):

This work describes the application of partial least squares (PLS) regression to variables that represent the oxidation data of several types of secondary metabolite isolated from the family Asteraceae. The oxidation states were calculated for each carbon atom of the involved compounds after these had been matched with their biogenetic precursor. The states of oxidation variations were named oxidation steps. This methodology represents a new approach to inspect the oxidative changes in taxa. Partial least square (PLS) regression was used to inspect the relationships among terpenoids, coumarins, polyacetylenes, and flavonoids from a data base containing approximately 27,000 botanical entries. The results show an interdependence between the average oxidation states of each class of secondary metabolite at tribe and sub tribe levels.

Gli stili APA, Harvard, Vancouver, ISO e altri

23

Tapalova, A., e O. Suleimenova. "Electrochemical analysis of oxidation-reduction reactions". Chemical Bulletin of Kazakh National University, n. 1 (14 maggio 2013): 148. http://dx.doi.org/10.15328/chemb_2013_1148-154.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

24

Carter, Dean E. "Oxidation-Reduction Reactions of Metal Ions". Environmental Health Perspectives 103 (febbraio 1995): 17. http://dx.doi.org/10.2307/3432005.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

25

Carter, D. E. "Oxidation-reduction reactions of metal ions." Environmental Health Perspectives 103, suppl 1 (febbraio 1995): 17–19. http://dx.doi.org/10.1289/ehp.95103s117.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

26

Lovley, D. R., J. D. Coates, J. C. Woodward e E. Phillips. "Benzene oxidation coupled to sulfate reduction." Applied and environmental microbiology 61, n. 3 (1995): 953–58. http://dx.doi.org/10.1128/aem.61.3.953-958.1995.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

27

Merica, Simona G., Wojceich Jedral, Susan Lait, Peter Keech e Nigel J. Bunce. "Electrochemical reduction and oxidation of DDT". Canadian Journal of Chemistry 77, n. 7 (1 luglio 1999): 1281–87. http://dx.doi.org/10.1139/v99-113.

Testo completo

Abstract (sommario):

Electrolysis has been studied as a possible method to treat DDT wastes. In methanol, the major process was dehydrochlorination to DDE followed by further reduction. In an aqueous emulsion containing 1% heptane and 0.1% Triton SP-175®, DDT was reduced at a deposited lead electrode with sodium sulphate as the supporting electrolyte by sequential hydrodechlorination of the aliphatic chlorine atoms. An excellent material balance was achieved, but the current efficiency was poor, even at low current densities. Electrooxidation of DDT was also investigated; in aqueous solutions or emulsion, little oxidation occurred because of competing oxidation of water at the highly positive potentials needed to oxidize DDT. In acetonitrile, electrooxidation occurred with high current efficiency by way of "electrochemical combustion" of DDT and its intermediate oxidation products to CO2. We conclude that development of an electrolytic technology for destroying DDT wastes is unlikely.Key words: electroreduction, electrooxidation, voltammetry, surfactant media.

Gli stili APA, Harvard, Vancouver, ISO e altri

28

Raber, Douglas J., e Walter Rodriguez. "Conformational properties of oxidation-reduction cofactors". Journal of the American Chemical Society 107, n. 14 (luglio 1985): 4146–47. http://dx.doi.org/10.1021/ja00300a009.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

29

Anselme, Jean-Pierre. "Understanding Oxidation - Reduction in Organic Chemistry". Journal of Chemical Education 74, n. 1 (gennaio 1997): 69. http://dx.doi.org/10.1021/ed074p69.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

30

Pace, Charles, e Marian Stankovich. "Oxidation-reduction properties of glycolate oxidase". Biochemistry 25, n. 9 (maggio 1986): 2516–22. http://dx.doi.org/10.1021/bi00357a035.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

31

Barcelona, Michael J., e Thomas R. Holm. "Oxidation-reduction capacities of aquifer solids". Environmental Science & Technology 25, n. 9 (settembre 1991): 1565–72. http://dx.doi.org/10.1021/es00021a006.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

32

Silverstein, Todd P. "Oxidation and Reduction: Too Many Definitions?" Journal of Chemical Education 88, n. 3 (marzo 2011): 279–81. http://dx.doi.org/10.1021/ed100777q.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

33

Kim, Geumsoo, Stephen J. Weiss e Rodney L. Levine. "Methionine oxidation and reduction in proteins". Biochimica et Biophysica Acta (BBA) - General Subjects 1840, n. 2 (febbraio 2014): 901–5. http://dx.doi.org/10.1016/j.bbagen.2013.04.038.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

34

Davies, Peter K., e Cynthia M. Katzan. "Oxidation and reduction of BaLa4Cu5O13+δ". Journal of Solid State Chemistry 88, n. 2 (ottobre 1990): 368–83. http://dx.doi.org/10.1016/0022-4596(90)90231-l.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

35

Readey, Dennis W. "Oxidation and Reduction of Ceramic Composites". Materials Science Forum 251-254 (ottobre 1997): 861–68. http://dx.doi.org/10.4028/www.scientific.net/msf.251-254.861.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

36

Hong, Yi-Zhe, Wei-Huan Chiang, Hung-Chieh Tsai, Min-Chiang Chuang, Yan-Chien Kuo, Lo-Yueh Chang, Chia-Hao Chen, Jonathon-David White e Wei-Yen Woon. "Local oxidation and reduction of graphene". Nanotechnology 28, n. 39 (6 settembre 2017): 395704. http://dx.doi.org/10.1088/1361-6528/aa802d.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

37

Coombs, P. G., e Z. A. Munir. "Cyclic reduction-oxidation of haematite powders". Journal of Materials Science 24, n. 11 (novembre 1989): 3913–23. http://dx.doi.org/10.1007/bf01168954.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

38

Rahman, Md Abdur, David R. Kelly, Prasad Ravi, Russell Underwood e Bert Fraser-Reid. "Controlled reduction and oxidation of actinobolin". Tetrahedron 42, n. 9 (gennaio 1986): 2409–16. http://dx.doi.org/10.1016/0040-4020(86)80003-5.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

39

Swarts, Pieter J., e Jeanet Conradie. "Oxidation and reduction data of subphthalocyanines". Data in Brief 28 (febbraio 2020): 105039. http://dx.doi.org/10.1016/j.dib.2019.105039.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

40

Becker, James Y. "Electrochemical Oxidation and Reduction of Allenes". Israel Journal of Chemistry 26, n. 2 (1985): 196–206. http://dx.doi.org/10.1002/ijch.198500093.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

41

Yang, Chia-Hsi, e You-Chung Lin. "The Self Oxidation Reduction ofN-Arylhydroxylamines". Journal of the Chinese Chemical Society 34, n. 1 (marzo 1987): 19–24. http://dx.doi.org/10.1002/jccs.198700004.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

42

Jellinek, Max. "Oxidation-Reduction Maintenance in Organ Preservation". Archives of Surgery 120, n. 4 (1 aprile 1985): 439. http://dx.doi.org/10.1001/archsurg.1985.01390280033008.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

43

Sadasivan, Sajanikumari, Ronan M. Bellabarba e Robert P. Tooze. "Size dependent reduction–oxidation–reduction behaviour of cobalt oxide nanocrystals". Nanoscale 5, n. 22 (2013): 11139. http://dx.doi.org/10.1039/c3nr02877a.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

44

Jung, S.-C., e W.-S. Yoon. "Modelling and parametric investigation of NOx reduction by oxidation precatalyst-assisted ammonia-selective catalytic reduction". Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 223, n. 9 (1 settembre 2009): 1193–206. http://dx.doi.org/10.1243/09544070jauto1099.

Testo completo

Abstract (sommario):

Nitrogen oxide (NO x) reduction by the selective catalytic reduction (SCR) system assisted by an oxidation precatalyst is modelled and analytically investigated. The Langmuir—Hinshelwood SCR kinetic scheme with vanadium-based catalyst and ammonia (NH3) reductant in conjunction with the NO—NO2 conversion reaction over a platinum-based catalyst is used. The effects of the ratio of the oxidation precatalyst to the SCR monolith volume, the gas temperature, the space velocity, and the NH3-to-NO x concentration ratio on the de-NO x performance are parametrically examined. The oxidation precatalyst promotes NO x conversion at low temperatures. At intermediate temperatures, the NO x reduction is either activated or deactivated with increase in the space velocity. A higher oxidation precatalyst-to-SCR monolith volume ratio tends to promote the NO x reduction of higher space velocities. At high temperatures, the de-NO x efficiency is very high and insensitive to the space velocity. The NO x conversion efficiency depends on the NH3-to-NO x ratio at low temperatures.

Gli stili APA, Harvard, Vancouver, ISO e altri

45

Yeow, Jonathan, Amandeep Kaur, Matthew D. Anscomb e Elizabeth J. New. "A novel flavin derivative reveals the impact of glucose on oxidative stress in adipocytes". Chem. Commun. 50, n. 60 (2014): 8181–84. http://dx.doi.org/10.1039/c4cc03464c.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

46

Wang, Tao, Yan Hong Leng e Lian Sheng Chen. "The Study on High-Temperature Oxidation Law of 20CrMo Steel in the Regenerative Heating Furnace". Advanced Materials Research 291-294 (luglio 2011): 778–81. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.778.

Testo completo

Abstract (sommario):

The special atmosphere of oxidation and reduction combustion in regenerative heating furnace is confirmed by anglicizing working principle of the furnace, and the growth and nature of steel’s oxide layer is influenced by the special combustion atmosphere. From the respects of thermodynamics and kinetics, the high-temperature oxidation regular of 20CrMo steel is studied. The oxidative production include steady oxide of Fe2O3、Fe3O4、FeO.The oxide layer grow slowly when temperature below 1100°C, but speedily when it is over1100°C. With the commutation of valve, the combustion atmosphere of regenerative heating furnace alternates between oxidation and reduction. Following the "intermittent" growth law, 20CrMo steel is in the process of “growth - decomposition –growth”.

Gli stili APA, Harvard, Vancouver, ISO e altri

47

Rael, Leonard T., Raphael Bar-Or, Charles W. Mains, Denetta S. Slone, A. Stewart Levy e David Bar-Or. "Plasma Oxidation-Reduction Potential and Protein Oxidation in Traumatic Brain Injury". Journal of Neurotrauma 26, n. 8 (agosto 2009): 1203–11. http://dx.doi.org/10.1089/neu.2008.0816.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

48

Mishchenko, Denis D., Zakhar S. Vinokurov, Tatyana N. Afonasenko, Andrey A. Saraev, Mikhail N. Simonov, Evgeny Yu Gerasimov e Olga A. Bulavchenko. "Insights into the Contribution of Oxidation-Reduction Pretreatment for Mn0.2Zr0.8O2−δ Catalyst of CO Oxidation Reaction". Materials 16, n. 9 (2 maggio 2023): 3508. http://dx.doi.org/10.3390/ma16093508.

Testo completo

Abstract (sommario):

A Mn0.2Zr0.8O2−δ mixed oxide catalyst was synthesized via the co-precipitation method and studied in a CO oxidation reaction after different redox pretreatments. The surface and structural properties of the catalyst were studied before and after the pretreatment using XRD, XANES, XPS, and TEM techniques. Operando XRD was used to monitor the changes in the crystal structure under pretreatment and reaction conditions. The catalytic properties were found to depend on the activation procedure: reducing the CO atmosphere at 400–600 °C and the reaction mixture (O2 excess) or oxidative O2 atmosphere at 250–400 °C. A maximum catalytic effect characterized by decreasing T50 from 193 to 171 °C was observed after a reduction at 400 °C and further oxidation in the CO/O2 reaction mixture was observed at 250 °C. Operando XRD showed a reversible reduction-oxidation of Mn cations in the volume of Mn0.2Zr0.8O2−δ solid solution. XPS and TEM detected the segregation of manganese cations on the surface of the mixed oxide. TEM showed that Mn-rich regions have a structure of MnO2. The pretreatment caused the partial decomposition of the Mn0.2Zr0.8O2−δ solid solution and the formation of surface Mn-rich areas that are active in catalytic CO oxidation. In this work it was shown that the introduction of oxidation-reduction pretreatment cycles leads to an increase in catalytic activity due to changes in the origin of active states.

Gli stili APA, Harvard, Vancouver, ISO e altri

49

Schoeller, Harry, e Junghyun Cho. "Oxidation and reduction behavior of pure indium". Journal of Materials Research 24, n. 2 (febbraio 2009): 386–93. http://dx.doi.org/10.1557/jmr.2009.0040.

Testo completo

Abstract (sommario):

Fundamental knowledge on the oxidation behavior of pure indium, commonly used as a low-temperature, fluxless soldering material in micro-electro-mechanical system (MEMS) devices, is of importance as it influences the solder joint reliability. A thermodynamic model of the oxidation and reduction behavior of indium is developed by constructing an Ellingham diagram, and by using H2(g) reactions. Partial pressure (p) of H2O was shown to be the critical parameter in creating a reducing environment in the applicable solder reflow temperature range. Verification of the thermodynamic models was then carried out through heating and melting of indium in controlled glove box environments by adjusting p(H2)/p(H2O). The nanometer scale thickness of the oxide layer grown on indium was measured by a spectroscopic ellipsometer. The growth mechanism for oxidation in air below 220 °C follows Uhlig's logarithmic law where electron transport is the rate-controlling mechanism, implying that there is an incubation period for the onset of initial oxidation. Its activation energy was found to be 0.65 eV.

Gli stili APA, Harvard, Vancouver, ISO e altri

50

Goodby, Brian E., e Jeanne E. Pemberton. "XPS Characterization of a Commercial Cu/ZnO/Al2O3 Catalyst: Effects of Oxidation, Reduction, and the Steam Reformation of Methanol". Applied Spectroscopy 42, n. 5 (luglio 1988): 754–60. http://dx.doi.org/10.1366/0003702884429148.

Testo completo

Abstract (sommario):

X-ray photoelectron spectroscopy (XPS) is used to characterize the surface region of a commercial Cu/ZnO/Al2O3 (33/66/1 wt %) catalyst. A systematic study of the effects of oxidation, reduction, and the steam reformation of methanol on the oxidative state of the Cu component is presented. The Zn XPS features show no changes due to the various treatments. Peak fitting procedures were developed to quantitate the Cu oxidation states on the basis of the XPS Cu 2P3/2 main and satellite features. After oxidation in pure O2 at 300°C, all Cu exists as Cu+2. The Cu/Zn ratio changes from 0.28 to 0.37 as a result of this oxidation, in comparison to the ratio in the catalyst as-received. The reduction studies involved different H2/N2 mixtures (15 to 100% H2) and temperatures (250 to 300°C). The catalyst always contains Cu+1 (7.0 ± 5.0%) and Cu° (93.0 ± 5.0%) sifter reduction. The Cu/Zn ratio decreases from approximately 0.37 in the oxidized catalyst to 0.13 after reduction. After methanol-steam reformation with a 50/50 vol % mixture, the Cu 2P3/2 and Auger features are indicative of complete reduction of all Cu in the catalyst to a reduced Cu° state not seen previously. Changes in the Cu/ Zn ratio of the surface are interpreted in terms of changes in surface morphology of the Cu species.

Gli stili APA, Harvard, Vancouver, ISO e altri

Offriamo sconti su tutti i piani premium per gli autori le cui opere sono incluse in raccolte letterarie tematiche. Contattaci per ottenere un codice promozionale unico!