TY - JOUR
T1 - A novel structure of quasi-monolayered NiCo-bimetalphosphide for superior electrochemical performance
AU - Zhao, Long
AU - Wen, Ming
AU - Tian, Yakun
AU - Wu, Qingsheng
AU - Fu, Yongqing
N1 - 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.
Publisher Copyright:
© 2022 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences
PY - 2022/11
Y1 - 2022/11
N2 - 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.
AB - 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.
KW - 2D quasi-monolayer
KW - Bimetal phosphide
KW - Hydrogen evolution reaction
KW - Oxygen evolution reaction
KW - Ultrasonic-cavitation
UR - http://www.scopus.com/inward/record.url?scp=85135707160&partnerID=8YFLogxK
U2 - 10.1016/j.jechem.2022.07.017
DO - 10.1016/j.jechem.2022.07.017
M3 - Article
SN - 2095-4956
VL - 74
SP - 203
EP - 211
JO - Journal of Energy Chemistry
JF - Journal of Energy Chemistry
ER -
