NH4F-Induced Morphology Control of CoP Nanostructures to Enhance the Hydrogen Evolution Reaction

• DOI: 10.1021/acs.inorgchem.1c01484
• Publication Date: 2021-06-30T19:21:47Z
• Authors: Tingting Xu; Liu Yang; Jing Li; Natalia Usoltseva; Vladimir An; Xin Jin; Cai Zhang; Xinglai Zhang; Baodan Liu
• Keywords: Overpotential; Nanorod; Phosphide

Developing non-noble metal catalysts with superior catalytic activity and excellent durability is critically essential to promote electrochemical water splitting for hydrogen production. Morphology control as a promising effective strategy widely implemented change the surface atomic coordination thus enhance intrinsic performance of current electrocatalysts. Herein, series cobalt phosphide (CoP) electrocatalysts tunable morphologies nanosheets, nanowires, nanorods, nanoblocks have been prepared enhanced evolution reaction (HER) by only adjusting amount ammonium fluoride (NH4F) in hydrothermal process. Benefiting from large active area, high activity, favorable ion gas diffusion channels, clustered CoP nanorods obtained at concentration 0.15 M NH4F show best HER an overpotential 71 mV density 10 mA cm–2 low Tafel slope 60.75 dec–1 1 KOH. After 3000 CV cycles 24 h tests, there very slight degradation owing its outstanding stability robust substrate adhesion.