期刊
NATURE COMMUNICATIONS
卷 10, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-019-09845-z
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资金
- National Key Research Program of China [2017YFA0204800, 2016YFA0202403]
- Natural Science Foundation of China [21603136]
- National Science Basic Research Plan in Shaanxi Province of China [2017JM2007]
- Changjiang Scholar and Innovative Research Team [IRT_14R33]
- 111 Project [B14041]
- Fundamental Research Funds for the Central Universities [GK201602007, 2018CSLZ011]
- Thousand Talents Program of China
- Science and Technology Innovative Talents Support Program of Shenyang [RC180166]
- Australian Research Council (ARC) [DE150101306, LP160100927]
- Pan Deng Scholars Program of Liaoning Province
Electrocatalytic water oxidation is a rate-determining step in the water splitting reaction. Here, we report one single atom W6+ doped Ni(OH)(2) nanosheet sample (w-Ni(OH)(2)) with an outstanding oxygen evolution reaction (OER) performance that is, in a 1 M KOH medium, an overpotential of 237 mV is obtained reaching a current density of 10 mA/cm(2). Moreover, at high current density of 80 mA/cm(2), the overpotential value is 267 mV. The corresponding Tafel slope is measured to be 33 mV/dec. The d(0) W6+ atom with a low spin-state has more outermost vacant orbitals, resulting in more water and OH- groups being adsorbed on the exposed W sites of the Ni(OH)(2) nanosheet. Density functional theory (DFT) calculations confirm that the O radical and O-O coupling are both generated at the same site of W6+. This work demonstrates that W6+ doping can promote the electrocatalytic water oxidation activity of Ni(OH)(2) with the highest performance.
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