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Abstract <p>The degradation resistance of modified SiO<sub>2</sub> carbon supports for electrocatalysts was evaluated using accelerated stress testing under model conditions. No direct correlations were found between the degradation resistance of the supports and that of the electrocatalysts based on them. The intensification of electrochemical corrosion processes is attributed to the presence of oxygen-containing groups in the silicon dioxide modifier on the carbon support surface. Conversely, electrocatalysts based on modified carbon supports exhibit an increase in electrochemically active surface area and degradation resistance by an average of 10‒25%.</p>

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Electrochemical Evaluation of Degradation Stability in Nanostructured Electrocatalysts Based on SiO2-modified Carbon Supports for PEM Fuel Cell Cathodes

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • D. E. Grineva,
  • A. A. Zasypkina,
  • R. M. Mensharapov,
  • D. D. Spasov,
  • N. V. Panchenko,
  • T. D. Patsaev,
  • P. V. Dmitryakov,
  • N. A. Ivanova

摘要

Abstract

The degradation resistance of modified SiO2 carbon supports for electrocatalysts was evaluated using accelerated stress testing under model conditions. No direct correlations were found between the degradation resistance of the supports and that of the electrocatalysts based on them. The intensification of electrochemical corrosion processes is attributed to the presence of oxygen-containing groups in the silicon dioxide modifier on the carbon support surface. Conversely, electrocatalysts based on modified carbon supports exhibit an increase in electrochemically active surface area and degradation resistance by an average of 10‒25%.