A novel structure of quasi-monolayered NiCo-bimetal-phosphide for superior electrochemical performance

Zhao, Long, Wen, Ming, Tian, Yakun, Wu, Qingsheng and Fu, Yong Qing (2022) A novel structure of quasi-monolayered NiCo-bimetal-phosphide for superior electrochemical performance. Journal of Energy Chemistry. ISSN 2095-4956

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Official URL: https://doi.org/10.1016/j.jechem.2022.07.017


Bimetallic transition metal phosphides (TMPs) as potential candidates for superior electrochemical performance are still facing great challenges in the controllable preparation of two-dimensional (2D) structures with high aspect ratio. Herein, a novel structure of quasi-monolayered NiCo-bimetal-phosphide (NiCoP) has been designed and successfully synthesized by the newly developed process combined with ultrasonic-cavitation and phase-transition. This is the first time to break through the controllable preparation of 2D bimetal-phosphides with a thickness of 0.98 nm in sub-nanoscale. Based on the advantages of 2D quasi-monolayer structure with dense crystalline-amorphous interface and the reconfigured electronic structure between Niδ+/Coδ+ and Pδ−, the optimized Ni5%CoP exhibits an outstanding bifunctional performance for electrocatalyzing both hydrogen evolution reaction and oxygen evolution reaction in an alkaline medium. Ni5%CoP presents lower overpotentials and voltage of 84 mV & 259 mV and 1.48 V at the current density of 10 mA·cm−2 for HER & OER and overall water splitting, respectively, which are superior to most other reported 2D bimetal-phosphides. This work provides a new strategy to optimize the performance of electrolytic water for bimetal-phosphates and it may be of significant value in extending the design of other ultrathin 2D structured catalysts.

Item Type: Article
Additional Information: Funding information: This work was financially supported by the National Natural Science Foundation (22171212), the Science and Technology Committee of Shanghai Municipality (21160710300, 19DZ2271500) of China, the International Exchange Grant (IEC/NSFC/201078) through Royal Society UK and NSFC
Uncontrolled Keywords: 2D quasi-monolayer, Hydrogen evolution reaction, Bimetal phosphide, Oxygen evolution reaction, Ultrasonic-cavitation
Subjects: F200 Materials Science
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: John Coen
Date Deposited: 02 Aug 2022 13:49
Last Modified: 22 Jul 2023 08:00
URI: https://nrl.northumbria.ac.uk/id/eprint/49691

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