期刊
ACS OMEGA
卷 4, 期 15, 页码 16612-16618出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.9b02504
关键词
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资金
- National Natural Science Foundation of China [61671206]
- Shanghai Science and Technology Innovation Action Plan [17JC1402500]
- Natural Science Foundation of Shanghai [18ZR1410900]
Layered cobalt hydroxides are cost-efficient electrocatalysts for oxygen evolution reaction (OER) in the field of energy conversion. Herein, we developed a facile synthesis method of 3d transition-metal-doped alpha-Co(OH)(2) nanomaterials mediated with ammonia in water-methanol at room temperature. The doping of Cu2+ and Ni2+ leads to flower-like nanostructures similar to pure alpha-Co(OH)(2) whereas the doping of Fe2+ produces nanoparticles with more than 2 times larger surface area in comparison with the Cu2+ and Ni2+-doped nanoflowers. The obtained dispersion with the addition of Nafion can be used directly as an electrocatalyst for OER with excellent catalytic activity, especially that the overpotential of Fe2+ doped is as low as 290 mV at 10 mA cm(-2). and the turnover frequency is improved by 3 times as compared with that of alpha-Co(OH)(2). Furthermore, the catalyst can be loaded onto foam nickel, which presents excellent durability with the current density unchanged under continuous chronoamperometry reaction for as long as 12 h and almost quantitative faradaic efficiency. The superior electrocatalytic properties combined with the simple synthesis without the tedious purification procedure is very promising for OER.
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