Please use this identifier to cite or link to this item: https://doi.org/10.1002/advs.201800036
Title: B, N Codoped and Defect-Rich Nanocarbon Material as a Metal-Free Bifunctional Electrocatalyst for Oxygen Reduction and Evolution Reactions
Authors: Sun, Tao 
Wang, Jun
Qiu, Chuntian
Ling, Xiang
Tian, Bingbing 
Chen, Wei 
Su, Chenliang 
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Chemistry
Science & Technology - Other Topics
Materials Science
boron and nitrogen codoping
carbon defects
metal-free bifunctional electrocatalysts
oxygen evolution reactions
oxygen reduction reactions
HIGH-PERFORMANCE
DOPED GRAPHENE
CARBON NANOTUBES
POROUS CARBON
ACTIVE-SITES
FUEL-CELLS
NITROGEN
BORON
CATALYSTS
SULFUR
Issue Date: 1-Jul-2018
Publisher: WILEY
Citation: Sun, Tao, Wang, Jun, Qiu, Chuntian, Ling, Xiang, Tian, Bingbing, Chen, Wei, Su, Chenliang (2018-07-01). B, N Codoped and Defect-Rich Nanocarbon Material as a Metal-Free Bifunctional Electrocatalyst for Oxygen Reduction and Evolution Reactions. ADVANCED SCIENCE 5 (7). ScholarBank@NUS Repository. https://doi.org/10.1002/advs.201800036
Abstract: © 2018 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim The development of highly active, inexpensive, and stable bifunctional oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) catalysts to replace noble metal Pt and RuO2 catalysts remains a considerable challenge for highly demanded reversible fuel cells and metal–air batteries. Here, a simple approach for the facile construction of a defective nanocarbon material is reported with B and N dopants (B,N-carbon) as a superior bifunctional metal-free catalyst for both ORR and OER. The catalyst is prepared by pyrolyzing the composites of ethyl cellulose and high-boiling point 4-(1-naphthyl)benzeneboronic acid in NH3 atmosphere with an inexpensive Zn-based template. The obtained porous B,N-carbon with rich carbon defects exhibits excellent ORR and OER performances, including high activity and stability. In alkaline medium, B,N-carbon material shows high ORR activity with an onset potential (Eonset) reaching 0.98 V versus reversible hydrogen electrode (RHE), very close to that of Pt/C, a high electron transfer number and excellent stability. This catalyst also presents the admirable ORR activity in acidic medium with a high Eonset of 0.81 V versus RHE and a four-electron process. The OER activity of B,N-carbon is superior to that of the precious metal RuO2 and Pt/C catalysts. A Zn–air battery using B,N-carbon as the air cathode exhibits a low voltage gap between charge and discharge and long-term stability. The excellent electrocatalytic performance of this porous nanocarbon material is attributed to the combined positive effects of the abundant carbon defects and the heteroatom codopants.
Source Title: ADVANCED SCIENCE
URI: https://scholarbank.nus.edu.sg/handle/10635/168929
ISSN: 2198-3844
DOI: 10.1002/advs.201800036
Appears in Collections:Staff Publications
Elements

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Advanced Science_201800036.pdfPublished version4.53 MBAdobe PDF

OPEN

PublishedView/Download

SCOPUSTM   
Citations

55
checked on Nov 23, 2020

Page view(s)

72
checked on Nov 20, 2020

Download(s)

4
checked on Nov 20, 2020

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.