Electrochemical water splitting has been known as a promising and environmental approach to produce hydrogen by avoiding relying on fossil fuels. Unfortunately, the efficient and large-scale $H_2$ production is still hindered by the sluggish kinetics of the oxygen evolution reaction (OER) at the anode side of a water electrolyzer. Herein, we report a novel amorphous sulfide doped cobalt oxide (amorphous Co-S-O) nanosphere as an efficient electrocatalyst for OER. The Co-S-O electrode exhibits high HER activity and good stability.

Hydrogen evolution reaction (HER) is long considered as a promising chemical reaction that can produce the clean fuel hydrogen to resolve the energy crisis and environmental pollution. Herein, we report the in situ growth of Co-Ni-Se network on a 3D porous Ni foam support (Co-Ni-Se/NF) as an efficient electrocatalyst for HER. The obtained Co-Ni-Se/NF electrode exhibits high HER activity that only needs a low overpotential of 106 mV at 10 mA cm$^{-2}.$

The development of efficient catalysts for the hydrogen evolution reaction (HER) is of extreme importance for future renewable energy systems. In this work, we report on the synthesis of a novel hybrid electrode that boracic nanospheres grown on the top of some ${\rm NiCo}_2{\rm O}_4$ nanowires with nickel foam as the baseboard$({\rm B-NiCo}_2{\rm O}_4{\rm /NF}).$ Due to this unique structural features, the electrocatalyst has a good activity for HER, which needs overpotential of 150 mV to afford the current density of 10 mA ${\rm cm}^{-2},$ the catalytic activity is maintained for at least 18 h. This work provides a promising methodology for the designing and fabricating highly efficient boracic catalysts for HER.