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Influence of Vanadium Doping on the Activity of Nanocomposite Electrocatalysts Based on Molybdenum Carbide and Reduced Graphene Oxide in the Process of Hydrogen Evolution from Water
Theoretical and Experimental Chemistry ( IF 1 ) Pub Date : 2022-03-09 , DOI: 10.1007/s11237-022-09711-y
D. O. Mazur , Ya. I. Kurys , V. G. Koshechko , V. D. Pokhodenko

It has been found that pyrolysis of hybrid precursors containing polypyrrole, H4PVMo11O40, and reduced graphene oxide (rGO) contributes to the production of nanocomposites based on V-doped Mo2C and N,P-doped rGO, which are promising electrocatalysts for hydrogen evolution reaction (HER). It has been shown that vanadium doping increases the activity of electrocatalysts in HER (both in acidic and alkaline electrolytes) when compared to the analog obtained by unsubstituted H3PMo12O40. In particular, it is manifested in a significant reduction of hydrogen evolution overpotential, anodic displacement of a process onset potential, and reduction of a Tafel slope dependence.



中文翻译:

钒掺杂对碳化钼和还原氧化石墨烯纳米复合电催化剂在水制氢过程中活性的影响

已经发现,含有聚吡咯、H 4 PVMo 11 O 40和还原氧化石墨烯 (rGO) 的混合前体的热解有助于生产基于 V 掺杂 Mo 2 C 和 N,P 掺杂 rGO 的纳米复合材料,它们是用于析氢反应(HER)的有前途的电催化剂。已经表明,与未取代的 H 3 PMo 12 O 40获得的类似物相比,钒掺杂增加了 HER(酸性和碱性电解质中的)电催化剂的活性. 特别是,它表现在显着降低析氢过电位、过程起始电位的阳极位移和降低塔菲尔斜率依赖性。

更新日期:2022-03-09
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