期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 9, 期 38, 页码 13114-13123出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.1c05728
关键词
earth-abundant elements; heteronanostructure; heterogeneous catalysis; electrocatalysis; oxygen evolution; water splitting
资金
- Abu Dhabi Award for Research Excellence
- National Research Foundation of Korea [2019R1A2C2086747]
- National Research Foundation of Korea [2019R1A2C2086747] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The development of OER catalysts is complex and challenging, involving a four-electron transport process and conversion of O-H bonds into O-O bonds. This study proposes a simple one-step synthetic strategy for preparing Cu2Se/NiSe2 heteronanostructure electrodes, significantly enhancing OER activity and demonstrating high durability in 1 M KOH.
Developing oxygen evolution reaction (OER) catalysts is intricate and challenging, involving a four-electron transport process coupled with conversion of O-H bonds into O-O bonds. This paper proposes a simple one-step synthetic strategy for preparing self-supported Cu2Se/NiSe2 heteronanostructure electrodes for the OER with well-defined heterointerfaces by directly embedding onto the conductive nickel foam substrate. The prepared catalyst significantly enhances OER activity with low overpotentials of 277 and 290 mV at current densities of 50 and 100 mA cm(-2), respectively, which is attributed to electronic structure modulation by synergetic interactions and enhanced charge transportation between Cu2Se and NiSe2 nanostructures. The as-prepared electrodes achieved high durability in 1 M KOH, retaining initial activity levels after 24 h continuous operation. We performed comprehensive spectroscopic and microscopic characterization before and after the OER to clarify active species and relate them to OER catalysis. Enhanced catalyst efficiency arises from integrating multicomponent electrocatalytic systems, which has been emphasized by the present findings.
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