Release time:2023-10-19  Hits:

• Key Words:HIGHLY EFFICIENT ELECTROCATALYST; METAL-ORGANIC FRAMEWORKS; PHOSPHIDE NANOPARTICLES; GENERATING HYDROGEN; PERFORMANCE; CATALYSTS; HYBRID; ARRAY
• Abstract:Tuning the structural features that furnish electrochemically active sites with improved kinetic diffusion can provide an alternative way to achieve high performance of electrocatalysis. Here, we report a nanostructure of Ni2P/C(NPC) nano-sheets supported on nickel foam (NF) that is prepared by sequenced nitrogen pyrolysis and gas phosphatization of Ni-MOF nanosheets. Initially, the passivated surface of nickel foam facilitates the oriented growth of Ni-MOF nanosheets, which is crucial for the maintenance of structure stability during the subsequent pyrolysis and phosphatization treatment. As a result, more catalytic active sites are exposed than the non-oriented NPC catalysts and diffusion kinetics is favorable. Consequently, the obtained composite can exhibit excellent hydrogen evolution catalytic activity in an alkaline electrolyte. For hydrogen evolution reaction, a current density of 10 mA cm(-2) is provided at an overpotential of 97 mV and its onset overpotential is only 29 mV. Meanwhile, good morphology and catalytic activity can be maintained after 12 h of stability testing. This excellent performance is believed to be the result of NPC nanosheet structure on NF derived from the facet-oriented control of pris-tine Ni-MOF, enabling excellent reaction kinetics. (C) 2020 Elsevier Inc. All rights reserved.
• Volume:572
• Issue:
• Translation or Not:no