Catalysts for Oxygen Reduction on a Vulcan XC-72 Carbon Substrate Modified with Transition Metals

K. Yu. Vinogradov; Виноградов К. Ю.; R. V. Shafigulin; Шафигулин Р. В.; S. V. Vostrikov; Востриков С. В.; E. A. Martynenko; Мартыненко Е. А.; V. V. Podlipnov; Подлипнов В. В.; A. V. Bulanova; Буланова А. В.

doi:10.31857/S0044185623700729

Catalysts for Oxygen Reduction on a Vulcan XC-72 Carbon Substrate Modified with Transition Metals

Autores: Vinogradov K.¹, Shafigulin R.¹, Vostrikov S.², Martynenko E.², Podlipnov V.¹, Bulanova A.¹
Afiliações:
1. Samara National Research University
2. Samara State Technical University
Edição: Volume 59, Nº 6 (2023)
Páginas: 577-585
Seção: ФИЗИКО-ХИМИЧЕСКИЕ ПРОЦЕССЫ НА МЕЖФАЗНЫХ ГРАНИЦАХ
URL: https://journals.rcsi.science/0044-1856/article/view/233772
DOI: https://doi.org/10.31857/S0044185623700729
EDN: https://elibrary.ru/ABIIVP
ID: 233772

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Resumo

This paper presents the results of a study of the catalytic activity of bimetallic materials synthesized based on Vulcan XC-72 carbon black modified with nickel, cobalt, and molybdenum in the electrochemical oxygen reduction reaction. The studies of the synthesized catalysts by adsorption–desorption of nitrogen in vacuum show that they are mesoporous and possess low porosity and surface area. After modification with metals, the surface area of the catalyst and pore volume decrease. The Raman spectra of the samples evidence probable formation of intermetallics or mixed molybdenum oxides on the surface of the MoCo/C and NiMo/C catalysts, which is in agreement with the published data. Scanning electron microscopy shows the formation of spherical metal parties on amorphous Vulcan XC-72. All the studied bimetallic catalysts possess similar kinetic characteristics of the electrochemical oxygen reduction reaction; nevertheless, NiMo/C and NiNi/C catalysts manifest a higher activity. The verification of the robustness of operation of the synthesized catalysts shows their high corrosion resistance.

Palavras-chave

electrochemical oxygen reduction, alkaline fuel cells, catalysts for oxygen reduction, carbon, substrates for catalysts, oxygen reduction reaction

Bibliografia

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