• 文献标题:   Catalysts for ORR Based on Silver-Modified Graphene Oxide and Carbon Nanotubes
  • 文献类型:   Article
  • 作  者:   VINOGRADOV KY, SHAFIGULIN RV, TOKRANOVA EO, VOSTRIKOV SV, MARTYNENKO EA, PODLIPNOV VV, KAZAKEVICH PV, SHELDAISOVMESHCHERYAKOV AA, VINOGRADOV NA, BULANOVA AV
  • 作者关键词:   electrochemical oxygen reduction, palladium, silver, orr, carbon nanotube, graphene oxide, bimetallic electrocatalyst
  • 出版物名称:   ENERGIES
  • ISSN:  
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.3390/en16031526
  • 出版年:   2023

▎ 摘  要

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 E1/2 = -0.23 V. The studied catalysts have characteristics comparable to those presented in the literature.