Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 26, Issue 13, Pages 2793-2797Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201904510
Keywords
cobalt nickel phosphate; high valence states; oxygen evolution reaction; pulsed laser ablation in liquids
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Funding
- Natural Science Foundation of China [51671079, 51871160, 51671141]
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Cost-effective, highly efficient and stable non-noble metal-based catalysts for the oxygen evolution reaction (OER) are very crucial for energy storage and conversion. Here, an amorphous cobalt nickel phosphate (CoNiPO4), containing a considerable amount of high-valence Ni3+ species as an efficient electrocatalyst for OER in alkaline solution, is reported. The catalyst was converted from Co-doped Ni2P through pulsed laser ablation in liquid (PLAL) and exhibits a large specific surface area of 162.5 m(2) g(-1) and a low overpotential of 238 mV at 10 mA cm(-2) with a Tafel slope of 46 mV dec(-1), which is much lower than those of commercial RuO2 and IrO2. This work demonstrates that PLAL is a powerful technology for generating amorphous CoNiPO4 with high-valence Ni3+, thus paving a new way towards highly effective OER catalysts.
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