Jump to main content
Jump to site search


One-pot synthesis of Co/N-doped mesoporous graphene with embedded Co/CoOx nanoparticles for efficient oxygen reduction reaction

Abstract

Exploration of sustainable electrocatalysts toward oxygen reduction reaction (ORR) with high catalytic activity remains a key challenge in the development of metal-air batteries and fuel cells. In this work a hybrid electrocatalyst composed of cobalt (Co/CoOx) nanoparticles encapsulated in Co/N-doped mesoporous graphene (Co/CoOx@Co/N-graphene) is reported for efficient ORR catalysis. The catalyst is rationally designed and synthesized via a facile combination of spontaneous one-pot polymerization of dopamine in the presence of graphene oxide (GO) and Co2+ ions and subsequent carbonization process. The morphology, doping nature and ORR activity of as-prepared catalyst are systematically investigated. It is found that there are abundant active Co/N sites and Co/CoOx nanoparticles in this hybrid catalyst, leading to synergistic enhancement effect for improved ORR activity. In alkaline environment, this Co/CoOx@Co/N-graphene catalyst displays Pt/C comparable ORR activity in terms of half-wave potential and four-electron reduction selectivity, while higher limiting current density, better methanol tolerant ability and long-term durability. When being evaluated in a Zn-air battery, it demonstrates superior performance to the commercial Pt/C catalyst.

Back to tab navigation

Supplementary files

Publication details

The article was accepted on 15 Jun 2017 and first published on 16 Jun 2017


Article type: Paper
DOI: 10.1039/C7NR03897F
Citation: Nanoscale, 2017, Accepted Manuscript
  •   Request permissions

    One-pot synthesis of Co/N-doped mesoporous graphene with embedded Co/CoOx nanoparticles for efficient oxygen reduction reaction

    Y. Niu, X. Huang, X. Wu, L. Zhao, W. Hu and C. M. Li, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR03897F

Search articles by author

Spotlight

Advertisements