Straw-like phosphorus-doped Co2MnO4 nanoneedle arrays supported on nickel foam for high-efficiency hydrogen evolution reaction in wide pH range of electrolytes

Developing high-performance and cut-price non-noble-metal electrocatalysts for hydrogen evolution reaction (HER) is desirable yet challenging. Herein, straw-like phosphorus-doped Co2MnO4 nanoneedle arrays supported on nickel foam (P-Co2MnO4/NF) were prepared by successive hydrothermal treatment, oxidation and P doping for high-efficiency HER. Benefiting from the unique needle-like arrays and compositions advantages, P-Co2MnO4/NF exhibited excellent HER activities with the overpotentials of 33, 43 and 102 mV to afford a current density of 10 mA cm(-2) in alkaline, acidic and neutral media, respectively, coupled with the long-term electrochemical stability. This work affords an effective avenue for preparation of cost-effectiveness, high-efficiency and wide-pH HER catalysts for electrochemical energy technologies.

Automated summary

The study successfully prepared straw-like phosphorus-doped Co2MnO4 nanoneedle arrays supported on nickel foam (P-Co2MnO4/NF), which exhibited excellent hydrogen evolution reaction (HER) activities in alkaline, acidic, and neutral media. The catalyst shows promise for electrochemical energy technologies with its cost-effectiveness, high efficiency, and wide pH adaptability.