Enhancing Electrocatalytic Performance via Thickness-Tuned Hollow N-Doped Mesoporous Carbon with Embedded Co Nanoparticles for Oxygen Reduction Reaction

Yingji Zhao, Liyang Zhu, Jing Tang*, Lei Fu, Dong Jiang, Xiaoqian Wei, Hiroki Nara*, Toru Asahi, Yusuke Yamauchi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Improving catalytic performance relies heavily on the rational design of the spatial structure of electrocatalysts, achieved through exposure of active sites, acceleration of the charge/mass transfer rate, and confinement of the reactants. In this study, we have fabricated Co nanoparticles embedded in overhang eave-like hollow N-doped mesoporous carbon (Co@EMPC) by adjusting the thickness of mesoporous polydopamine (mPDA). Thanks to the abundance of short mesoporous channels within the porous structure and the tuned electronic properties resulting from heterojunction structures between metal and carbon, the prepared Co@EMPC provides increased accessibility to active sites and enhanced mass and charge transfer rates. These features contribute to superior performance in the oxygen reduction reaction (ORR), with a half-wave potential of 0.874 V vs RHE, as well as exceptional durability in alkaline media. This study introduces a useful approach to enhance the ORR using eave-like hollow nanoreactors.

Original languageEnglish
Pages (from-to)373-382
Number of pages10
JournalACS Nano
Volume18
Issue number1
DOIs
Publication statusPublished - 2024 Jan 9

Keywords

  • geometrical construction
  • heterojunction structures
  • hollow mesoporous materials
  • overhang eave-like structure
  • oxygen reduction reaction

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering
  • General Physics and Astronomy

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