Catalysts for ORR Based on Silver-Modified Graphene Oxide and Carbon Nanotubes

Kirill Yurievich Vinogradov, Roman Vladimirovich Shafigulin, Elena Olegovna Tokranova, Sergey Vladimirovich Vostrikov, Evgeniya Andreevna Martynenko, Vladimir Vladimirovich Podlipnov, Pavel Vladimirovich Kazakevich, Artem Anatolevich Sheldaisov-Meshcheryakov, Nikolai Aleksandrovich Vinogradov and Andzhela Vladimirovna Bulanova ()
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Kirill Yurievich Vinogradov: Institute of Natural Sciences, Samara University, 443086 Samara, Russia
Roman Vladimirovich Shafigulin: Institute of Natural Sciences, Samara University, 443086 Samara, Russia
Elena Olegovna Tokranova: Institute of Natural Sciences, Samara University, 443086 Samara, Russia
Sergey Vladimirovich Vostrikov: Chemical Engineering Faculty, Samara State Technical University, 443100 Samara, Russia
Evgeniya Andreevna Martynenko: Chemical Engineering Faculty, Samara State Technical University, 443100 Samara, Russia
Vladimir Vladimirovich Podlipnov: Institute of Natural Sciences, Samara University, 443086 Samara, Russia
Pavel Vladimirovich Kazakevich: Samara Branch of Р.N. Lebedev Physical Institute, Russian Academy of Sciences, 443011 Samara, Russia
Artem Anatolevich Sheldaisov-Meshcheryakov: Chemical Engineering Faculty, Samara State Technical University, 443100 Samara, Russia
Nikolai Aleksandrovich Vinogradov: Chemical Engineering Faculty, Samara State Technical University, 443100 Samara, Russia
Andzhela Vladimirovna Bulanova: Institute of Natural Sciences, Samara University, 443086 Samara, Russia

Energies, 2023, vol. 16, issue 3, 1-13

Abstract: The main obstacle to the widespread dissemination of fuel cells is the high cost, so researchers are actively searching for ways to replace the expensive platinum catalyst with cheaper analogs. In this paper we studied the Ag- and Pd-containing carbon catalysts based on carbon nanotubes and graphene oxide. The study of the textural characteristics of the catalysts showed that the greatest specific surface area has a catalyst based on MWCNT containing 10% silver, all synthesized catalysts are mainly mesoporous, and the content of micropores is insignificant. Raman spectroscopy and SEM data indicate a significant change in the structure of the modified carriers compared to pure MWCNT and GO. An electrochemical experiment was performed and linear voltammetric diagrams were obtained and compared with the voltammetric diagrams obtained on the platinum catalyst. GO_Ag 10% and MWCNT_Ag 10% Pd 10% are closest in the values of kinetic parameters in both kinetic and diffusion regions. GO_Ag 10% has the highest initial potential E onset = −0.145 V and MWCNT_Ag 10% Pd 10% has the highest half-wave potential E½ = −0.23 V. The studied catalysts have characteristics comparable to those presented in the literature.

Keywords: electrochemical oxygen reduction; palladium; silver; ORR; carbon nanotubes; graphene oxide; bimetallic electrocatalysts (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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