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Carbon-Based Electrocatalysts for Acidic Oxygen Reduction Reaction.

Pengbo Cui1, Linjie Zhao1, Yongde Long1

  • 1State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.

Angewandte Chemie (International Ed. in English)
|January 16, 2023
PubMed
Summary

Metal-free carbon electrocatalysts offer a low-cost alternative to platinum for the oxygen reduction reaction (ORR) in clean energy technologies like fuel cells. This review highlights advances in carbon-based metal-free electrochemical catalysts (C-MFECs) for ORR in acidic media.

Keywords:
Acidic MediaCarbon-Based Metal-Free ElectrocatalystsFuel CellsFuture OpportunitiesOxygen Reduction Reaction

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Conversion

Background:

  • The oxygen reduction reaction (ORR) is crucial for clean energy technologies but relies heavily on expensive platinum catalysts.
  • High cost and scarcity of platinum hinder the widespread application of renewable energy devices, such as fuel cells.
  • Earth-abundant carbon materials are emerging as promising alternatives for metal-free electrocatalysts.

Purpose of the Study:

  • To critically review carbon-based metal-free electrochemical catalysts (C-MFECs) for ORR in acidic media.
  • To emphasize advances in the design, synthesis, and understanding of C-MFECs.
  • To discuss the application of C-MFECs in proton exchange membrane fuel cells.

Main Methods:

  • Review of recent scientific literature on C-MFECs for ORR.
  • Analysis of structure-property relationships and electrocatalytic mechanisms.
  • Evaluation of C-MFECs performance in proton exchange membrane fuel cells.

Main Results:

  • C-MFECs demonstrate significant potential as low-cost, high-performance electrocatalysts for ORR in acidic environments.
  • Advances in synthesis and structural design have improved the efficiency and durability of C-MFECs.
  • Understanding the structure-property relationships is key to optimizing C-MFEC performance.

Conclusions:

  • C-MFECs represent a viable and sustainable alternative to platinum for ORR catalysis.
  • Further research into C-MFEC design and mechanistic understanding is needed for commercialization.
  • C-MFECs hold great promise for the future of clean energy technologies, particularly fuel cells.