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Nickel-cobalt (NiCo) alloys with bimetallic electronic modulation are considered promising candidates for urea electrolysis. However, their highly occupied?d-band states limit the adsorption of reaction intermediates, resulting in insufficient activity toward urea oxidation reaction (UOR) and hydrogen evolution reaction (HER). Herein, a phosphorus-doped amorphous NiCo alloy is synthesized, in which P incorporation modulates the electronic structure and upshifts the?d-band center of NiCo alloy, thus optimizing the adsorption of OH??and urea molecules. The sample with optimal P content exhibits low potentials for UOR (E10/1000?= 1.28/1.65 VRHE) and HER (E?10/?1000?= ?67/?206 mVRHE). Furthermore, it achieves an industrial-level current density of 500 mA cm?2?at a cell voltage of 1.72 V in the membrane electrode assembly, while maintaining stable activity for 150 h. Therefore, this work provides a new strategy to optimize reactant adsorption and ultimately enhance the electrocatalytic activity by modulating the?d-band center.
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CN 35–1112/TQ, ISSN 0254–5861, Online ISSN: 2949-768X Copyright @ 2022 Chinese Journal of Structural Chemistry-www.Chinese Journal of Structural Chemistry.net. All Rights Reserved 閩ICP備2022002645號-1