A “Superaerophobic” Se-Doped CoS2 Porous Nanowires Array for Cost-Saving Hydrogen Evolution

The pursuit of low-cost and high-efficiency catalyst is imperative for the development utilization hydrogen energy. Heteroatomic doping which conducive to redistribution electric density one promising strategies improve catalytic activity. Herein, Se-doped CoS2 porous nanowires array with a superaerophobic surface was constructed on carbon fiber. Due electronic modulation unique structure, it showed improved evolution activity stability in urea-containing electrolyte. At current 10 mA cm−2, overpotentials are 188 mV reaction (HER) 1.46 V urea oxidation (UOR). When set as cell, voltage low 1.44 V. Meanwhile, densities HER UOR, well cell remained basically unchanged after continuous operation 48 h. This work opens up new idea designing cost-saving electrocatalysts.