Journal
JOURNAL OF ENERGY CHEMISTRY
Volume 37, Issue -, Pages 13-17Publisher
ELSEVIER
DOI: 10.1016/j.jechem.2018.11.013
Keywords
Oxygen evolution reaction; Nanowires; Electrocatalysis; Porous structure; Cobalt Oxides
Funding
- National Natural Science Foundation of China [51728204, 51502263, 51772272]
- Fundamental Research Funds for the Central Universities [2018QNA4011]
- Qianjiang Talents Plan D [QJD1602029]
- Program for Innovative Research Team in University of Ministry of Education of China [IRT13037]
- Startup Foundation for Hundred-Talent Program of Zhejiang University
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Rational design of cost-effective high-performance electrocatalysts for oxygen evolution reaction (OER) is of great significance for electrochemical water splitting. Herein, we adopt a nitrogen doping method to fabricate self-supported N-doped CoO nanowire arrays (N-CoO) as active electrocatalysts via a facile hydrothermal combined doping method. The N-CoO nanowires are strongly composited with the carbon cloth substrate forming free-standing electrode with reinforced stability and high electronic conductivity. Owing to the increased accessible and electroactive areas, rich/short pathways for charge transfer and enhanced electronic conductivity, the N-CoO electrode exhibits excellent electrocatalytic performance for OER with a low overpotential (319 mV at 10 mA cm(-2 )and 410 mV at 100 mA cm(2)) and a low Tafel slope of 74 mV dec(-1) as well as superior long-term stability with no decay in 24h continuous test in alkaline solution. Our reported design and optimization strategy provide a promising way to construct interesting well-aligned arrays for application in energy storage and conversion. (C) 2018 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
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