Hollow Nanocages of NixCo1−xSe for Efficient Zinc–Air Batteries and Overall Water Splitting

A facile strategy for fabricating NixCo1−xSe hollow nanocages was developed, and the formation mechanism was well explained. Ni0.2Co0.8Se outperformed a Pt/C + RuO2 catalyst in rechargeable and all-solid-state Zn–air battery tests, as well as in overall water splitting. The hydrogen adsorption onto NixCo1−xSe was simulated, and Gibbs free energies were calculated.