Co nanoparticle-decorated pomelo-peel-derived carbon enabled high-efficiency electrocatalytic nitrate reduction to ammonia

Cobalt nanoparticle-decorated pomelo-peel-derived carbon acts as a highly active electrocatalyst for NO 3 − –to–NH 3 conversion, capable of attaining a large faradaic efficiency of 90.1% and an ultrahigh NH 3 yield of 1.1 mmol h −1 mg cat . −1 .