Journal
ELECTROCATALYSIS
Volume 10, Issue 1, Pages 56-62Publisher
SPRINGER
DOI: 10.1007/s12678-018-0494-y
Keywords
Oxygen reduction reaction; B, N co-doped; Graphene aerogels; Three-dimensional porous structure
Categories
Funding
- National Nature Science Foundation of China [21575071]
- Qingdao Innovation Leading Expert Program
- Qingdao Basic AMP
- Applied Research Project [15-9-1-100-jch]
- Open Funds of the State Key Laboratory of Electroanalytical Chemistry [SKLEAC201601]
- Science AMP
- Technology Fund Planning Project of Shandong Colleges and Universities [J16LA13]
- Training Programme for Outstanding Young Teachers in Higher Education Institutions of Guangdong Province [YQ2015203]
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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 (0.1M KOH) with a much more positive onset potential (0.994V vs. RHE) than most of the existing B, N co-doped ones, a dominant four-electron transfer mechanism (n=3.73 at 0.6V), as well as excellent stability.
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