MXene (Ti₃C₂T_<i>x</i>)‐Supported Binary Co‐, Zn‐Doped Carbon as Oxygen Reduction Reaction Catalyst for Anion Exchange Membrane Fuel Cells

Abstract

Transition metal–nitrogen–carbon materials are used as catalysts for the oxygen reduction reaction (ORR) because of their low cost, high activity, and stability in the alkaline medium. Herein, CoZn/nitrogen–carbon (NC)–Ti 3 C 2 as an ORR electrocatalyst is prepared by one‐step pyrolysis of zeolitic imidazolate framework (ZIF)‐67/ZIF‐8 on the Ti 3 C 2 surface. The CoZn/NC–Ti 3 C 2 catalyst presents considerable kinetics with a half‐wave potential (E 1/2 ) of 0.847 V, and the fuel cell peak power density reaches 245 mW cm −2 . Furthermore, this catalyst exhibits an excellent stability with only 4.83% drop of relative current after 30000 s of testing. Herein, a new strategy for high‐effective and high‐stability non‐precious metal catalysts for anion exchange membrane fuel cells is provided.