Low-temperature construction of high-density Ni single-atom sites on nitrogen-doped carbon to boost dual-channel oxygen reduction†

Abstract

Herein, a low-temperature ligand pre-oxidation strategy is proposed to design high-density Ni single-atom sites on amorphous nitrogen-doped carbon substrates. The obtained Ni–O@NC boosts dual-channel oxygen reduction and exhibits about 92.6% hydrogen peroxide selectivity.