Heteroatom Doping Synergistic Iron Nitride Induced Charge Redistribution of Carbon based Electrocatalyst with Boosted Oxygen Reduction Reaction

Abstract

Oxygen reduction reaction (ORR) is Achilles' heel of zinc-air battery. The ideal electrocatalyst for ORR should combine both high activity and high stability. In order to achieve this goal, a new N, S co-doped carbon coated Fe 3 N nanoparticles electrocatalyst with redistributed charge was designed and synthesized. The doping of S elements destroyed the ordered structure of carbon matrix, which cooperated with Fe 3 N nanoparticles to cause charge redistribution of carbon atoms.Furthermore, the carbon shell protected Fe 3 N from corrosion during the electrocatalytic process. Fe 3 N/NSC electrocatalyst showed excellent ORR property with E 1/2 = 0.86 V, and the zincair battery assembled based on it could run stably for more than 650 hours. This work provides a strategy to regulate the redistributed charge of carbon atoms to boost its electrocatalytic activity and stability together.

Cobalt(ii)-bridged triphenylamine and terpyridine-based donor–acceptor coordination polymer as an efficient trifunctional electrocatalyst

“…But the chemistry of materials with inherent limitations makes it difficult to meet the growing needs. [1][2][3][4][5][6][7] Electrochemical redox reactions such as the oxygen reduction reaction (ORR), 8,9 oxygen evolution reaction (OER), 10,11 and hydrogen evolution reaction (HER) 12,13 occur at the electrodes of these devices. The electrocatalyst should promote the ORR in fuel cells, OER in metal-air batteries, and HER for dihydrogen fuel generation.…”