Facile synthesis of N, S co-doped CoMoO4 nanosheets as high-efficiency electrocatalysts for hydrogen evolution reaction

The development of low-cost and high-efficiency hydrogen evolution reaction (HER) electrocatalysts has become extremely essential to address global energy issues. Herein, we have fabricated arrays of nitrogen and sulfur co-doped CoMoO 4 ultrathin nanosheets grown on nickel foam (N, S-CoMoO 4 /NF 400 ). The experimental results demonstrate that modulating the electronic structure of CoMoO 4 by co-doping N and S atoms is one of the most powerful methods to boost the performance of HER. N, S-CoMoO 4 /NF 400 displays superior HER activity under alkaline environment, with overpotentials of 58 and 119 mV at 10 and 100 mA cm −2 . The excellent performance of the N, S-CoMoO 4 /NF 400 electrode proves that the N, S co-doping engineering can significantly improve the catalytic activity of transition metal-based oxide HER.