期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 8, 期 3, 页码 1105-1112出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta12377f
关键词
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资金
- National Natural Science Foundation of China [11974303, 11574263]
- Key Laboratory of Ministry of Industry and Information Technology in Nanjing University of Science and Technology
- Qinglan Project of Jiangsu Province
- Personnel Plan of Yangzhou University
The oxygen evolution reaction (OER) is vital for a series of renewable energy solutions including water splitting and metal-air batteries. Great effort focused on nanostructure engineering has enabled a substantial advance in cost-efficient OER catalysts. In contrast, this work reports a simple and feasible strategy to improve OER performance via integrating photo-electro activation. Herein, for the first time, we present an interesting photo-enhanced effect on electrocatalytic OER activity for layered double hydroxides (LDHs). Defect-rich ultrathin CoFe-LDH nanosheets (NSs) are demonstrated as a typical semiconducting catalyst to exhibit a nearly 3-fold increase in mass activity upon 1 sun irradiation (100 mW cm(-2)), higher than those of the most advanced OER catalysts. Photo-induced charge kinetic analyses reveal dynamic optimization in terms of photon harvesting, charge separation and transfer, and surface catalysis. This work describes the compatibility of photo-electro activation over semiconducting LDHs, opening a new avenue to improve catalytic activity with free solar energy.
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