Self-Supporting Honeycomb Nickel Cobalt Phosphide on Nickel Foam as an Efficient Electrocatalyst for the Hydrogen Evolution Reaction

Abstract

Designing and synthesizing non-noble metal catalysts with efficient hydrogen evolution efficiency are of great significance for large-scale application. Here, a bimetallic compound-combined matrix strategy is developed for the synthesis of honeycomb NiCo-4-P nanosheets on nickel foam (NF). Due to the synergistic advantage of bimetallic atoms, improved conductivity and increased active sites were provided on the NF. The self-supporting NiCo-4-P/NF catalyst proved to be an excellent hydrogen evolution reaction (HER) catalyst in 1 M KOH with a low overpotential of 99 mV at a current density of 10 mA cm −2 , a Tafel slope of 47 mV dec −1 , and a good long-term stability for 12 h. In addition, the effect of bimetallic atom concentration on the hydrogen evolution performance of the catalyst has been discussed. This study provides an effective method for developing nonprecious metal HER electrocatalysts for industrial hydrogen production.

Ni−CeO2 Heterostructure Promotes Hydrogen Evolution Reaction via Tuning of the O−H Bond Length of Adsorbed Water at the Electrolyte/Electrode Interface

“…Supporting Information is available from the Wiley Online Library or from the author. Additional references cited within the Supporting Information [36,59–76] …”

“…Additional references cited within the Supporting Information. [36,[59][60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76]…”

Regulating catalytic kinetics in nanoclimbing-wall-like NiO/NiCoP hybrids for enhanced overall water splitting

“…Because of the synergy between nickel and cobalt and the enhanced water adsorption capacity of bimetallic NiCoP, NiCoP is expected to show more superior electrochemical activity. [14][15][16] However, NiCoP still has the disadvantage of insufficient OER activity, thereby showing unsatisfactory electrocatalytic water splitting performance. To synergistically address the issue of fewer active sites and sluggish catalytic kinetics toward the OER, hybridizing NiCoP with foreign active species could be considered as a feasible strategy to simultaneously regulate the adsorption equilibrium of intermediates during different reaction pathways.…”