Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Autoxidation Core@Anti-Oxidation Shell Structure as a Catalyst Support for Oxygen Reduction Reaction in Proton Exchange Membrane Fuel Cell

  • Heo, Yong-Kang (Advanced Research Team, Hyundai Steel) ;
  • Lee, Seung-Hyo (Department of Ocean Advanced Materials Convergence Engineering, Korea Maritime and Ocean University)
  • Received : 2022.06.27
  • Accepted : 2022.06.30
  • Published : 2022.11.02
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Abstract

Proton exchange membrane fuel cells (PEMFCs) provide zero emission power sources for electric vehicles and portable electronic devices. Although significant progresses for the widespread application of electrochemical energy technology have been achieved, some drawbacks such as catalytic activity, durability, and high cost of catalysts still remain. Pt-based catalysts are regarded as the most efficient catalysts for sluggish kinetics of oxygen reduction reaction (ORR). However, their prohibitive cost limits the commercialization of PEMFCs. Therefore, we proposed a NiCo@Au core shell structure as Pt-free ORR electrocatalyst in PEMFCs. NiCo alloy was synthesized as core to introduce ionization tendency and autoxidation reaction. Au as a shell was synthesized to prevent oxidation of core NiCo and increase catalytic activity for ORR. Herein, we report the synthesis, characterization, electrochemical properties, and PEMFCs performance of the novel NiCo@Au core-shell as a catalyst for ORR in PEMFCs application. Based on results of this study, possible mechanism for catalytic of autoxidation core@anti-oxidation shell in PEMFCs is suggested.

Keywords

Acknowledgement

This work was supported by the Korea Maritime And Ocean University Research Fund.

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