Laser-controlled tandem catalytic sites of CuNi alloys with ampere-level electrocatalytic nitrate-to-ammonia reduction activities for Zn–nitrate batteries

Laser-constructed CuNi alloy electrodes with tandem sites of Ni provide H* and Cu for NO 3 − reduction, achieving ampere-level NO 3 − reduction and high-performance Zn–NO 3 − batteries.