期刊
APPLIED SURFACE SCIENCE
卷 557, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2021.149831
关键词
Nanotubes; Heterostructure; Bifunctional electrocatalyst; OER; HER
类别
资金
- Hunan Provincial Natural Science Foundation [2019JJ40028]
- Hunan Provincial Science and Technology Department [2019GK5001]
In this study, a hierarchical heterostructure bifunctional electrocatalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) was fabricated, showing excellent electrocatalytic performance in alkaline environment and providing a promising candidate for high-efficiency overall water splitting.
Development of highly active and stable bifunctional electrocatalysts for electrolysis of water is important for future renewable energy systems. Herein, the hierarchical heterostructure bifunctional electrocatalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is fabricated by coupling NiCo-layered double hydroxide (NiCo-LDH) nanosheets with NiCoP nanotubes on Ni foam. The NiCo-layered double hydroxide (NiCo-LDH) nanosheets/NiCoP nanotubes/Ni foam exhibits excellent electrocatalytic performance in alkaline environment, which is determined by a low overpotential of 112 mV and 219 mV to reach 10 mA.cm(-2) for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. The as-prepared electrocatalyst as the anode and cathode only requires a cell voltage of 1.54 V to afford 10 mA.cm(-2). The excellent electrocatalytic performance originates from the heterostructure and nanotubes structure, improving the intrinsic activity, providing a large specific surface area. This work provides a promising candidate for highefficiency overall water splitting.
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