fabrication of a 3D self-supported porous Ni-Mo-Cu catalyst for an efficient hydrogen evolution reaction

• Published in: Dalton transactions : an international journal of inorganic chemistry Vol. 52; no. 25; pp. 8654 - 866
• Main Authors: Miao, Fang, Cui, Peng, Yu, Shijie, Gu, Tao
• Format: Journal Article
• Published: 27.06.2023
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/d3dt00699a

It is still a challenge to develop very effective and stable non-noble catalysts for the hydrogen evolution reaction (HER). Here, a self-supported porous Ni-Mo-Cu coating is prepared by the dynamic hydrogen bubble template (DHBT) method. This three-dimensional (3D) porous Ni-Mo-Cu coating can offer a large surface area, which helps expose more active sites and promote the transmission of electrons and materials. To achieve this, the 3D porous Ni-Mo-Cu coating catalyst requires a low overpotential value of 70 mV at 10 mA cm −2 in 1 M KOH and stable catalytic properties at a high current density of 500 mA cm −2 for more than 10 h with no obvious evidence of degradation. DFT calculations show the source of the excellent catalytic performance of the 3D porous Ni-Mo-Cu catalyst in alkaline media, including the kinetic energy and adsorption energy. This work provides significant insight into the design of efficient 3D porous materials. A 3D self-supported porous Ni-Mo-Cu coating catalyst was prepared, which exhibits a high HER activity and excellent catalytic stability even at a high current density of 500 mA cm −2 in alkaline media.