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Journal articles on the topic 'Oxy-hydroxide nanoparticles'

Author: Grafiati
Published: 6 September 2023

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1

Dante, Silvia, Zhizhong Hou, Subhash Risbud, and Pieter Stroeve. "Nucleation of Iron Oxy-Hydroxide Nanoparticles by Layer-by-Layer Polyionic Assemblies." Langmuir 15, no. 6 (March 1999): 2176–82. http://dx.doi.org/10.1021/la980587j.

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2

Thakkar, Sachin G., Haiyue Xu, Xu Li, and Zhengrong Cui. "Uric acid and the vaccine adjuvant activity of aluminium (oxy)hydroxide nanoparticles." Journal of Drug Targeting 26, no. 5-6 (January 28, 2018): 474–80. http://dx.doi.org/10.1080/1061186x.2018.1428808.

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3

Suntako, Rudeerat. "Effect of ZnO Nanoparticles Synthesized by Precipitation Method on Cure Characteristics and Morphology of EPDM Foam." Advanced Materials Research 1025-1026 (September 2014): 525–30. http://dx.doi.org/10.4028/www.scientific.net/amr.1025-1026.525.

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ZnO nanoparticles synthesized by precipitation method using zinc nitrate tetrahydrate and sodium hydroxide as starting materials. ZnO nanoparticles synthesized exhibited a crystalline structure with hexagonal structure. The average primary size of ZnO synthesized around 22.71 nm and the specific surface area around 28.17 m2/g. EPDM foam used oxy-bis benzene sulfonylhydrazide (OBSH) as blowing agent and ZnO nanoparticles synthesized as activator of sulphur vulcanization. The effect of ZnO nanoparticles synthesized compared with conventional ZnO on cure characteristics and morphology of EPDM foam were investigated. The result showed that the maximum torque (MH) increased, optimum cure time (t90) and scorch time (T5) decreased with increasing ZnO nanoparticles synthesized loading. The cell structure of EPDM foam was spherulite and smaller when increased ZnO nanoparticles synthesized loading. The compressive load value increased with increasing ZnO nanoparticles synthesized loading which may be attributed to thickness of the cell wall and hardness increased. ZnO nanoparticles synthesized could be reduced successfully from 5 to 3 phr (40%) for EPDM foam.
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4

Fan, Guang-Yin, and Jie Wu. "Mild hydrogenation of quinoline to decahydroquinoline over rhodium nanoparticles entrapped in aluminum oxy-hydroxide." Catalysis Communications 31 (January 2013): 81–85. http://dx.doi.org/10.1016/j.catcom.2012.11.015.

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5

Kara, Belgüzar Yasemin, Benan Kılbaş, and Haydar Göksu. "Selectivity and activity in catalytic hydrogenation of azido groups over Pd nanoparticles on aluminum oxy-hydroxide." New Journal of Chemistry 40, no. 11 (2016): 9550–55. http://dx.doi.org/10.1039/c6nj01925k.

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6

Guaya, Diana, Hernán Cobos, César Valderrama, and José Luis Cortina. "Effect of Mn2+/Zn2+/Fe3+ Oxy(Hydroxide) Nanoparticles Doping onto Mg-Al-LDH on the Phosphate Removal Capacity from Simulated Wastewater." Nanomaterials 12, no. 20 (October 20, 2022): 3680. http://dx.doi.org/10.3390/nano12203680.

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A parent Mg-Al-LDH was upgraded in its adsorption properties due to the incorporation of tri-metal species oxy(hydroxide) nanoparticles obtaining Mn2+/Zn2+/Fe3+/Mg-Al-LDH composite for the phosphate recovery from simulated urban treated wastewater. The physicochemical properties of the synthesized Mn2+/Zn2+/Fe3+/Mg-Al-LDH make promising for real application without being environmentally harmful. The performance of Mn2+/Zn2+/Fe3+/Mg-Al-LDH composite was evaluated through batch adsorption assays. The support of iron, manganese, and zinc (oxy)hydroxide nanoparticles onto the parent Mg-Al-LDH structure was performed by precipitation, isomorphic substitution, and complexation reactions. The main improvement of the Mn2+/Zn2+/Fe3+/Mg-Al-LDH composite was the highest phosphate adsorption capacity (82.3 mg∙g−1) in comparison to the parent Mg-Al-LDH (65.3 mg∙g−1), in a broad range of concentrations and the effective phosphate adsorption at neutral pH (7.5) near to the real wastewater effluents conditions in comparison to the conventional limitations of other adsorbents. The effectiveness of Mn2+/Zn2+/Fe3+/Mg-Al-LDH composite was higher than the conventional metal LDHs materials synthesized in a single co-precipitation step. The phosphate adsorption onto Mn2+/Zn2+/Fe3+/Mg-Al-LDH composite was described to be governed by both physical and chemical interactions. The support of Mn2+/Zn2+/Fe3+ oxy(hydroxide) nanoparticles over the parent Mg-Al-LDH was a determinant for the improvement of the phosphate adsorption that was governed by complexation, hydrogen bonding, precipitation, and anion exchange. The intra-particular diffusion also described well the phosphate adsorption onto the Mn2+/Zn2+/Fe3+/Mg-Al-LDH composite. Three specific stages of adsorption were determined during the phosphate immobilization with an initial fast rate, followed by the diffusion through the internal pores and the final equilibrium stage, reaching 80% of removal and the equilibrium within 1 h. The Mn2+/Zn2+/Fe3+/Mg-Al-LDH was strongly selective towards phosphate adsorption in presence of competing ions reducing the adsorption capacity at 20%. The Mn2+/Zn2+/Fe3+/Mg-Al-LDH has limited reusability, only 51% of the adsorbed phosphate could be recovered in the second cycle of the adsorption-desorption process. Around 14% of phosphate was loosely-bond to Mn2+/Zn2+/Fe3+/Mg-Al-LDH which brings the opportunity to be a new source of phosphorus. The use of eluted concentrates and the final disposal of the exhausted adsorbent for soil amendment applications can be an integral nutrient system (P, Mn, Zn, Fe) for agriculture purposes.
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7

Ghiasi, Mahnaz, and Azim Malekzadeh. "Synthesis, characterization and photocatalytic properties of lanthanum oxy-carbonate, lanthanum oxide and lanthanum hydroxide nanoparticles." Superlattices and Microstructures 77 (January 2015): 295–304. http://dx.doi.org/10.1016/j.spmi.2014.09.027.

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8

Rajakaruna, Tharindu P. B., Chandana P. Udawatte, Rohana Chandrajith, and Rajapakse Mudiyanselage Gamini Rajapakse. "Formulation of Iron Oxide and Oxy-hydroxide Nanoparticles from Ilmenite Sand through a Low-Temperature Process." ACS Omega 6, no. 28 (July 7, 2021): 17824–30. http://dx.doi.org/10.1021/acsomega.1c00938.

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9

Fan, Guang Yin, and Chun Zhang. "Effective Hydrogenation of p-Chloronitrobenzene over Iridium Nanoparticles Entrapped in Aluminum Oxy-Hydroxide under Mild Conditions." Advanced Materials Research 881-883 (January 2014): 267–70. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.267.

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The Ir/AlO(OH) catalyst was prepared by sol-gel method and used for selective hydrogenation of p-chloronitrobenzene (p-CNB) to p-chloroniamine (p-CAN). The mechanism of p-CNB hydrogenation over the catalyst was discussed. The hydrogen bond between the surface hydroxyl groups of the catalyst and the nitrogen present in p-CNB facilitated the hydrogenation of nitro group. On the other hand, the formation of hydrogen bond between the hydrogenation product and water promotes the rapid desorption of the hydrogenation product on the surface of the catalyst. Thus the activity and selectivity were greatly promoted.
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10

Lee, Eunjik, Ah-Hyeon Park, Hyun-Uk Park, and Young-Uk Kwon. "Facile sonochemical synthesis of amorphous NiFe-(oxy)hydroxide nanoparticles as superior electrocatalysts for oxygen evolution reaction." Ultrasonics Sonochemistry 40 (January 2018): 552–57. http://dx.doi.org/10.1016/j.ultsonch.2017.07.048.

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11

Du, Xinyu, Junling Guo, Mingpeng Chen, Weng-Chon Cheong, Yuyun Chen, Dong Liu, Shi Chen, et al. "Surface reconstruction on silver nanoparticles decorated trimetallic hydroxide nanosheets to generate highly active oxygen-deficient (oxy)hydroxide layer for high-efficient water oxidation." Chemical Engineering Journal 425 (December 2021): 131662. http://dx.doi.org/10.1016/j.cej.2021.131662.

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12

Simeonidis, Konstantinos, Kyriaki Kalaitzidou, Efthimia Kaprara, Georgia Mitraka, Theopoula Asimakidou, Lluis Balcells, and Manassis Mitrakas. "Uptake of Sb(V) by Nano Fe3O4-Decorated Iron Oxy-Hydroxides." Water 11, no. 1 (January 21, 2019): 181. http://dx.doi.org/10.3390/w11010181.

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The presence of antimony in water remains a major problem for drinking water technology, defined by the difficulty of available adsorbents to comply with the very low regulation limit of 5 μg/L for the dominant Sb(V) form. This study attempts to develop a new class of water adsorbents based on the combination of amorphous iron oxy-hydroxide with Fe3O4 nanoparticles and optimized to the sufficient uptake of Sb(V). Such a Fe3O4/FeOOH nanocomposite is synthesized by a two-step aqueous precipitation route from iron salts under different oxidizing and acidity conditions. A series of materials with various contents of Fe3O4 nanoparticles in the range 0–100 wt % were prepared and tested for their composition, and structural and morphological features. In order to evaluate the performance of prepared adsorbents, the corresponding adsorption isotherms, in the low concentration range for both Sb(III) and Sb(V), were obtained using natural-like water. The presence of a reducing agent such as Fe3O4 results in the improvement of Sb(V) uptake capacity, which is found around 0.5 mg/g at a residual concentration of 5 μg/L. The intermediate reduction of Sb(V) to Sb(III) followed by Sb(III) adsorption onto FeOOH is the possible mechanism that explains experimental findings.
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13

Göksu, Haydar. "Recyclable aluminium oxy-hydroxide supported Pd nanoparticles for selective hydrogenation of nitro compounds via sodium borohydride hydrolysis." New Journal of Chemistry 39, no. 11 (2015): 8498–504. http://dx.doi.org/10.1039/c5nj01492a.

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14

Göksu, Haydar, and Emine Gültekin. "Pd nanoparticles Incarcerated in Aluminium Oxy-Hydroxide: An Efficient and Recyclable Heterogeneous Catalyst for Selective Knoevenagel Condensation." ChemistrySelect 2, no. 1 (January 3, 2017): 458–63. http://dx.doi.org/10.1002/slct.201601721.

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15

Du, Peng, Yuren Wen, Fu-Kuo Chiang, Ayan Yao, Jun-Qiang Wang, Jianli Kang, Luyang Chen, Guoqiang Xie, Xingjun Liu, and Hua-Jun Qiu. "Corrosion Engineering To Synthesize Ultrasmall and Monodisperse Alloy Nanoparticles Stabilized in Ultrathin Cobalt (Oxy)hydroxide for Enhanced Electrocatalysis." ACS Applied Materials & Interfaces 11, no. 16 (April 2019): 14745–52. http://dx.doi.org/10.1021/acsami.8b22268.

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16

Goeksu, Haydar. "ChemInform Abstract: Recyclable Aluminum Oxy-Hydroxide Supported Pd Nanoparticles for Selective Hydrogenation of Nitro Compounds via Sodium Borohydride Hydrolysis." ChemInform 47, no. 10 (February 2016): no. http://dx.doi.org/10.1002/chin.201610071.

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17

Guaya, Diana, Luz Maza, Adriana Angamarca, Eda Mendoza, Luis García, César Valderrama, and José Luis Cortina. "Fe3+/Mn2+ (Oxy)Hydroxide Nanoparticles Loaded onto Muscovite/Zeolite Composites (Powder, Pellets and Monoliths): Phosphate Carriers from Urban Wastewater to Soil." Nanomaterials 12, no. 21 (October 31, 2022): 3848. http://dx.doi.org/10.3390/nano12213848.

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The development of an efficient adsorbent is required in tertiary wastewater treatment stages to reduce the phosphate–phosphorous content within regulatory levels (1 mg L−1 total phosphorous). In this study, a natural muscovite was used for the preparation of muscovite/zeolite composites and the incorporation of Fe3+/Mn2+ (oxy)hydroxide nanoparticles for the recovery of phosphate from synthetic wastewater. The raw muscovite MC and the obtained muscovite/sodalite composite LMC were used in the powder form for the phosphate adsorption in batch mode. A muscovite/analcime composite was obtained in the pellets PLMCT3 and monolith SLMCT2 forms for the evaluation in fixed-bed mode for continuous operation. The effect of pH, equilibrium and kinetic parameters on phosphate adsorption and its further reuse in sorption–desorption cycles were determined. The characterization of the adsorbents determined the Fe3+ and Mn2+ incorporation into the muscovite/zeolite composite’s structure followed the occupancy of the extra-framework octahedral and in the framework tetrahedral sites, precipitation and inner sphere complexation. The adsorbents used in this study (MC, LMC, PLMCT3 and SLMCT2) were effective for the phosphate recovery without pH adjustment requirements for real treated wastewater. Physical (e.g., electrostatic attraction) and chemical (complexation reactions) adsorption occurred between the protonated Fe3+/Mn2+ (oxy)hydroxy groups and phosphate anions. Higher ratios of adsorption capacities were obtained by powder materials (MC and LMC) than the pellets and monoliths forms (PLMCT3 and SLMCT2). The equilibrium adsorption of phosphate was reached within 30 min for powder forms (MC and LMC) and 150 min for pellets and monoliths forms (PLMCT3 and SLMCT2); because the phosphate adsorption was governed by the diffusion through the internal pores. The adsorbents used in this study can be applied for phosphate recovery from wastewater treatment plants in batch or fixed-bed mode with limited reusability. However, they have the edge of environmentally friendly final disposal being promissory materials for soil amendment applications.
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18

Chang, Fei, Hakwon Kim, Byeongno Lee, Sungho Park, and Jaiwook Park. "Highly efficient solvent-free catalytic hydrogenation of solid alkenes and nitro-aromatics using Pd nanoparticles entrapped in aluminum oxy-hydroxide." Tetrahedron Letters 51, no. 32 (August 2010): 4250–52. http://dx.doi.org/10.1016/j.tetlet.2010.06.024.

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19

Chang, Fei, Hakwon Kim, Byeongno Lee, Sungho Park, and Jaiwook Park. "ChemInform Abstract: Highly Efficient Solvent-Free Catalytic Hydrogenation of Solid Alkenes and Nitro-Aromatics Using Pd Nanoparticles Entrapped in Aluminum Oxy-Hydroxide." ChemInform 41, no. 47 (October 28, 2010): no. http://dx.doi.org/10.1002/chin.201047039.

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20

Hong, Xiaoling, Qilu Yao, Meiling Huang, Hongxia Du, and Zhang-Hui Lu. "Bimetallic NiIr nanoparticles supported on lanthanum oxy-carbonate as highly efficient catalysts for hydrogen evolution from hydrazine borane and hydrazine." Inorganic Chemistry Frontiers 6, no. 9 (2019): 2271–78. http://dx.doi.org/10.1039/c9qi00848a.

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La2O2CO3-supported NiIr nanoparticles (NPs) have been facilely synthesized via a sodium–hydroxide-assisted reduction approach and used as highly efficient catalysts for hydrogen generation from hydrazine borane and hydrous hydrazine.
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21

Boettcher, Shannon W., Aaron James Kaufman, and Meikun Shen. "(Invited) Nanoscale Electrocatalyst/Semiconductor Interfaces As Charge-Carrier-Selective Contacts in Photocatalytic and Photoelectrochemical Systems." ECS Meeting Abstracts MA2022-01, no. 36 (July 7, 2022): 1570. http://dx.doi.org/10.1149/ma2022-01361570mtgabs.

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Charge-carrier-selective interfaces between electrocatalyst particles and semiconductor light absorbers are critical for solar photochemistry but controlling their properties is challenging. In this talk I will show that the nanoelectrode tip of an atomic-force-microscope cantilever can sense the surface electrochemical potential of thin-film and nanoscale electrocatalysts coating semiconductor photoelectrodes during operation. This technique allowed us to unambiguously show that metal (oxy)hydroxide layers act as both hole collectors and oxygen-evolution catalysts on metal-oxide photoanodes such as Fe2O3 and BiVO4. We also discovered the critical role that heterogeneous interfacial barrier heights, and a related nanoscale pinch-off effect, play in building carrier-selective interfaces in semiconductor photoelectrodes for generating fuel from sunlight. As specific example, thin films and nanoparticle of Pt hydrogen-evolution catalysts on p-InP, a high-performance photocathode material, along with macroscopic and nanoscopic electrical and chemical analysis, are used to show how hydrogen alloying, the pinch-off effect for nanoscale contacts, and the formation of a native surface oxides all play different roles in creating charge-carrier-selective junctions. The sum of these new insights can be broadly applied to photocathodes, photoanodes, and overall water-splitting systems to control charge-carrier selectivity and improve performance.
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22

Boettcher, Shannon W., Aaron James Kaufman, and Meikun Shen. "(Invited) Local and Macroscopic Probes of Semiconductor/Electrocatalyst Photochemical Interfaces." ECS Meeting Abstracts MA2022-02, no. 48 (October 9, 2022): 1814. http://dx.doi.org/10.1149/ma2022-02481814mtgabs.

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Charge-carrier-selective interfaces between electrocatalyst particles and semiconductor light absorbers are critical for solar photochemistry but controlling their properties is challenging. In this talk I will show that the nanoelectrode tip of an atomic-force-microscope cantilever can sense the surface electrochemical potential of thin-film and nanoscale electrocatalysts coating semiconductor photoelectrodes during operation. This technique allowed us to unambiguously show that metal (oxy)hydroxide layers act as both hole collectors and oxygen-evolution catalysts on metal-oxide photoanodes such as Fe2O3 and BiVO4. We also discovered the critical role that heterogeneous interfacial barrier heights, and a related nanoscale pinch-off effect, play in building carrier-selective interfaces in semiconductor photoelectrodes for generating fuel from sunlight. As specific example, thin films and nanoparticle of Pt hydrogen-evolution catalysts on p-InP, a high-performance photocathode material, along with macroscopic and nanoscopic electrical and chemical analysis, are used to show how hydrogen alloying, the pinch-off effect for nanoscale contacts, and the formation of a native surface oxides all play different roles in creating charge-carrier-selective junctions. These measurements are compared and contrasted to a new approach to “wirelessly” measure interfacial for different contact materials by analyzing shifts in element-specific shifts in x-ray photoelectron emission energies. The sum of these new insights can be broadly applied to photocathodes, photoanodes, and overall water-splitting systems to control charge-carrier selectivity and improve performance.
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23

Grandjean, Stephane, Chapelet-Arab Bénédicte, Lemonnier Stéphane, Robisson Anne-Charlotte, and Vigier Nicolas. "Innovative Synthesis Methods of Mixed Actinides Compounds with Control of the Composition Homogeneity at a Molecular or Nanometric Scale." MRS Proceedings 893 (2005). http://dx.doi.org/10.1557/proc-0893-jj08-03.

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AbstractActinides contained in the used nuclear fuel need to be managed in the future fuel cycles for the sustainability of this source of energy. The major ones such as uranium or plutonium are very valuable for energy production within a new fuel. The minor ones such as neptunium, americium or curium are responsible for the long-term radiotoxicity of the ultimate waste if not separated and transmuted within new fuels or dedicated targets. Whatever the choice of management in the present or future, innovative synthesis methods are studied in many research institutions to elaborate new actinides based materials.Innovative concepts for future fuels or transmutation targets focus on mixed actinides or mixed actinide-inert element materials. For their synthesis, wet methods fulfill very useful requirements such as flexibility, compatibility with a hydrometallurgical fuel processing, less dissemination of radioactive dusts during processing, and above all a better accessibility to very homogeneous compounds and interesting nanostructures. When dealing with plutonium or minor actinides, this last characteristic is of great importance in order to avoid the so-called “hot spots” and to limit macroscopic defects in the fuel material.In this communication, experimental results are given to illustrate interesting achievements to control the composition or the structure of mixed actinides compounds at a molecular or at a nanometric scale using co-precipitating techniques or sol-gel methods.The first illustration describes the flexibility of the oxalate ligand to modulate the nanostructure of actinides-based solid precursors and obtain mixed actinides oxide following a thermal treatment of the oxalate precursor. New mixed oxalate structures which present original features such as accepting in the same crystallographic site either a tetravalent actinide or a trivalent one are noticeably detailed. Monocharged cations equilibrate the charge in the 3D structure depending on the molar ratio of trivalent to tetravalent actinides. These oxalate compounds are particularly suitable precursors of oxide solid solutions for various actinides systems.The second illustration deals with the control of inorganic condensation reactions of tri- and tetravalent cations in solution by using suitable ligands with a view to obtaining homogeneous oxy-hydroxyde mixtures. The results obtained using Zr(IV), Y(III) and Am(III) or Nd(III) are quite original: a very stable colloidal sol is obtained at pH 5-6 and a nanostructured mixed oxy-hydroxide phase is formed by adapting the sol-gel transition conditions. The initial interactions between the oxy-hydroxide Zr nanoparticles, the ligand and the trivalent cations at a nanometric scale in the sol give access, after gel formation and thermal treatment, to a crystallized phase (Am-bearing cubic Y-stabilized Zirconia) at comparatively low temperatures.In both cases, the simultaneous co-precipitation or co-gelation of the involved actinides remains a challenge because of the specific properties of each actinide, properties which moreover differ according to various possible oxidation states.
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24

Ji, Pengxia, Deyong Zheng, Huihui Jin, Ding Chen, Xu Luo, Jinlong Yang, Zhenbo Wang, and Shichun Mu. "Ultra‐Fast In Situ Reconstructed Nickel (Oxy)Hydroxide Nanoparticle Crosslinked Structure for Super‐Efficient Alkaline Water Electrolysis by Sacrificing Template Strategy." Small Structures, March 29, 2023. http://dx.doi.org/10.1002/sstr.202300013.

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