Coordination Effect-Promoted Durable Ni(OH)₂ for Energy-Saving Hydrogen Evolution from Water/Methanol Co-Electrocatalysis.

ABSTRACT: Electrocatalytic water splitting is a viable technique for generating hydrogen but is precluded from the sluggish kinetics of oxygen evolution reactions (OER). Small molecule oxidation reactions with lower working potentials, such as methanol oxidation reactions, are good alternatives to OER with faster kinetics. However, the typically employed Ni-based electrocatalysts have poor activity and stability. Herein, a novel three-dimensional (3D)-networking Mo-doped Ni(OH)₂ with ultralow Ni-Ni coordination is synthesized, which exhibits a high MOR activity of 100 mA cm^-2 at 1.39 V, delivering 28 mV dec^-1 for the Tafel slope. Meanwhile, hydrogen evolution with value-added formate co-generation is boosted with a current density of more than 500 mA cm^-2

SUBMITTER: Fu G 

PROVIDER: S-EPMC9537394 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature