期刊
APPLIED CLAY SCIENCE
卷 165, 期 -, 页码 277-283出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.clay.2018.07.036
关键词
Layered double hydroxides; Nanoplates; Hydrothermal; Electrocatalyst; Oxygen evolution reaction
资金
- National Natural Science Foundation of China [51372279]
- Hunan Provincial Natural Science Foundation of Chinan [13JJ1005]
- Central South University
- JSPS KAKENNHI [15H03534, 15K13296]
Active, stable and low-cost electrocatalysts are in high demand to replace the traditional noble metal catalysts towards efficient water splitting. Here we report a type of nickel-manganese (Ni-Mn) layered double hydroxide (LDH) with controllable doping content of cobalt as an oxygen evolution reaction (OER) electrocatalyst with excellent performance in alkaline media. Co-doped Ni-Mn LDH nanoplates were synthesized via a facile hydrothermal method. It was found that the doping content of cobalt significantly affected the OER activities. The best electrocatalyst was based on a doping ratio of 21.1% Co, exhibiting a low overpotential of similar to 310 mV at a current density of 10 mA cm(-2), a Tafel slope of similar to 59 mV dec(-1) as well as excellent stability. This work demonstrates a facile synthetic method of rationally doping transition-metal hydroxides to develop new OER electrocatalysts with remarkable performance in water splitting.
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