Scholarlink

Abstract <p>The energy crisis and environmental pollution have made the development of highly efficient oxygen reduction reaction (ORR) electrocatalysts a research priority to improve fuel cell performance. A simple one-pot hydrothermal method was successfully used to synthesize the Fe<sub>3</sub>O<sub>4</sub>@MnO<sub>2</sub>/NC composite material, and the performance of catalyst was enhanced by adjusting the molar ratio of Fe–Mn and the addition of coconut shell carbon (CSC). The characterization results show that the Fe<sub>3</sub>O<sub>4</sub>@MnO<sub>2</sub>/NC with core–shell structure has a high specific surface area (751 m<sup>2</sup> g<sup>–1</sup>) and provides abundant active sites for ORR. The electrochemical test results show that Fe<sub>3</sub>O<sub>4</sub>@MnO<sub>2</sub>/NC exhibits a superior ORR activity among the as-prepared catalysts due to strong interfacial coupling interaction. In addition, it also has a high specific capacitance, a small Tafel slope, and the lowest impedance in ORR. This not only verifies its excellent performance, but also provides a new approach and idea for developing non-precious metal ORR catalysts.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A Novel Application of Fe3O4@MnO2/NC Bimetallic Oxide Catalyst with Core–Shell Structure toward Oxygen Reduction Reaction

  • 期刊论文

  • 发表日期：

    2025年3月1日

查看全文
  • Aiai Zhang,
  • Chunli Li,
  • Zheng Liu,
  • Shisi Yuan,
  • Yang Chen,
  • Qiong Wang,
  • Fengzhen Zhang

摘要

Abstract

The energy crisis and environmental pollution have made the development of highly efficient oxygen reduction reaction (ORR) electrocatalysts a research priority to improve fuel cell performance. A simple one-pot hydrothermal method was successfully used to synthesize the Fe3O4@MnO2/NC composite material, and the performance of catalyst was enhanced by adjusting the molar ratio of Fe–Mn and the addition of coconut shell carbon (CSC). The characterization results show that the Fe3O4@MnO2/NC with core–shell structure has a high specific surface area (751 m2 g–1) and provides abundant active sites for ORR. The electrochemical test results show that Fe3O4@MnO2/NC exhibits a superior ORR activity among the as-prepared catalysts due to strong interfacial coupling interaction. In addition, it also has a high specific capacitance, a small Tafel slope, and the lowest impedance in ORR. This not only verifies its excellent performance, but also provides a new approach and idea for developing non-precious metal ORR catalysts.