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Low-Cost and Highly Efficient Metal-Free Electrocatalysts for Oxygen Reduction Reaction: Environment-Friendly Three-Dimensional B, N Co-doped Graphene Aerogels

Authors
  • Han, Jingrui1
  • Zhang, Yanlin2
  • Niu, Fushuang1
  • Chen, Tao1
  • Liu, Jingquan1
  • Xu, Yuanhong1
  • 1 Qingdao University, College of Life Sciences, College of Materials Science and Engineering, College Institute for Graphene Applied Technology Innovation, Qingdao, 266071, China , Qingdao (China)
  • 2 Guangdong Polytechnic of Environmental Protection Engineering, Department of Environmental Monitoring, Foshan, 528216, China , Foshan (China)
Type
Published Article
Journal
Electrocatalysis
Publisher
Springer US
Publication Date
Oct 08, 2018
Volume
10
Issue
1
Pages
56–62
Identifiers
DOI: 10.1007/s12678-018-0494-y
Source
Springer Nature
Keywords
License
Yellow

Abstract

Nitrogen (N) and boron (B) co-doped graphene materials have been certified as promising catalyst for oxygen reduction reaction (ORR), since the dual doping of foreign atoms could induce a unique electronic structure in graphene and create a synergistic coupling effect between heteroatoms. However, previously reported B, N co-doped graphene materials suffered from shortcomings such as needing highly toxic precursors or high cost or complex preparation procedures. Herein, one highly efficient metal-free ORR catalyst, three-dimensional graphene aerogels (GAs) co-doped with B and N using economical and environmentally friendly melamine and boric acid as heteroatom precursors, was prepared through a one-step hydrothermal method. The as-prepared microporous B, N co-doped GAs showed excellent electrochemical catalytic performances for ORR under alkaline condition (0.1 M KOH) with a much more positive onset potential (0.994 V vs. RHE) than most of the existing B, N co-doped ones, a dominant four-electron transfer mechanism (n = 3.73 at 0.6 V), as well as excellent stability. Graphical Abstractᅟ

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