期刊
ELECTROCHIMICA ACTA
卷 354, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2020.136645
关键词
Bifunctional electrocatalysts; Structure modulation; Hydrogen evolution; Oxygen evolution; Overall water splitting
资金
- National Natural Science Foundation of China [51571063, 51727801, 11622545, U1732268, 51672049]
- Natural Science Foundation of Shanghai
- Shanghai Sailing Program [20YF1432300]
- China Postdoctoral Science Foundation [KLH2021056]
- Recruitment Program of Global Youth Experts (National Thousand Young Talents Program)
Precisely controlling the morphology of electrocatalyst which is critical to its activity and stability remains a key challenge toward efficient overall water splitting. Herein, a distinct temperature-dependent structure modulation effect of electroless plating technique is reported and consequently several bifunctional electrocatalysts with various structures are developed. The optimized bifunctional electrode with cobalt-phosphorus-boron nanoflowers growing on the carbon cloth demands overpotentials of only 91 mV and 294 mV to achieve a current density of 50 mA cm(-2) for the hydrogen evolution reaction and oxygen evolution reaction in 1.0 M potassium hydroxide at 25 degrees C. Moreover, an overall water-splitting device assembled by this electrode can also work at high temperature of 60 degrees C with excellent long term durability and achieve a current density of 20 mA cm(-2) at a cell voltage of around 1.39 V. This work uncovers some structure design principles of highly active electrocatalyst and provides a versatile strategy for structure modulation of the electrocatalyst for pratctical water electrolysis. (C) 2020 Elsevier Ltd. All rights reserved.
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