Free-standing ternary NiWP film for efficient water oxidation reaction
By Yang, Yunpeng; Zhou, Kuo; Ma, Lili; Liang, Yanqin; Yang, Xianjin; Cui, Zhenduo; Zhu, Shengli; Li, Zhaoyang
Published in Applied Surface Science
2018
Abstract
High-efficient catalysts for oxygen evolution reaction (OER) is of great concern in improving energy efficiency for water splitting. Here we report a high-performance {OER} electrocatalyst of nickel-tungsten-phosphorus (NiWP) film prepared by template method. This free-standing ternary electrocatalyst exhibits a remarkable electrocatalytic activity of {OER} in alkaline medium due to the synergetic effect among these elements and the good electrical conductivity. The reported NiWP composite catalyst has an overpotential of as low as 0.4 V (vs. RHE) at 30 mA cm?2, better than that of the commercial RuO2 catalyst. Moreover, a small charge transfer resistance of 4.06 ? and a Tafel slope of 68 mV dec?1 demonstrate the outstanding catalytic activity.
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