期刊
NANOSCALE
卷 10, 期 11, 页码 5163-5170出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nr00426a
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资金
- Natural Science Foundation of China [21701071, 21673105]
- Fundamental Research Funds for the Central University [lzujbky-2017-106, lzujbky-2016-K09]
- Science and Technology Program of Gansu Province of China [17JR5RA194]
- Foundation of Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) in Nankai University
Developing highly efficient oxygen evolution reaction (OER) electrocatalysts is critical to the cost-effective generation of clean fuels. Transition-metal selenides have been proposed to be OER catalyst alternatives to noble metal based catalysts, but generally exhibit limited electrocatalytic activity. We here report hierarchical Fe-doped Ni3Se4 ((Ni,Fe)(3)Se-4) ultrathin nanosheets as an efficient electrocatalyst for OER in alkaline electrolytes. The preparation involves a solvothermal synthesis and a topotactic conversion process. The prepared hierarchical (Ni,Fe)(3)Se-4 ultrathin nanosheets show abundant and accessible catalytically active sites, facile charge transfer and a high specific surface area. Relative to the Ni3Se4 nanosheets, the as -prepared (Ni,Fe)(3)Se-4 ultrathin nanosheets show a higher current density and a lower Tafel slope towards the OER. Remarkably, hierarchical (Ni,Fe)(3)Se-4 ultrathin nanosheets supported on Ni foam exhibit an electrocatalytic OER with a current density of 10 mA cm at a low overpotential of 225 mV and a small Tafel slope of about 41 mV dec(-1). This study establishes (Ni,Fe)(3)Se-4 ultrathin nanosheets as an efficient electrocatalyst for the OER that can be used in the fields of metal-air batteries and water splitting for hydrogen production.
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