Atomically well-mixed quad-metallic sulfide as multi-functional electrocatalyst for overall water electrolysis and zinc-air battery

Precious-metal-free medium entropy sulfide nanoparticles embedded in the sulfur-doped polyacrylonitrile-derived carbon fiber, maximizing the synergistic effects through atomically well-mixed composition, exhibit breakthrough electrocatalytic activities toward water electrolysis and rechargeable ZAB.