title: Layered Transition Metal Oxynitride Co3Mo2OxN6-x/C Catalyst for Oxygen Reduction Reaction.
abstract: Transition metal oxynitrides have now garnered growing interest in our quest for highly efficient alternatives to Pt in direct methanol alkaline fuel cells. Herein, carbon supported Co3Mo2OxN6-xwas synthesized via a simple two-step approach wherein the reactants undergo refluxing and heat treatment in NH3. For the as-prepared Co3Mo2OxN6-xcatalyst, uniformly dispersed on XC-72, with the particle size averaged at 5 nm, the catalytic activities toward oxygen reduction reaction in alkaline media are related to the commercial Pt/C, such as the comparable onset potential (0.9 V vs RHE), half-wave potential (0.8 V vs RHE), and even higher specific activity (82.7 mA cm-2at 0.7 V). Significantly, the Co3Mo2OxN6-xcatalyst was highly stable in terms of 95% current retention after 12 h chronoamperometry measurement, indicative of favorable prospect for the non-noble cathodic catalyst in alkaline fuel cell.
authors.affiliation: Beijing Key Lab for Theory and Technology of Advanced Batteries Materials, College of Engineering, Peking University , Beijing 100871, People's Republic of China.
authors.forename: Li
authors.initials: L
authors.lastname: An
authors.affiliation: Beijing Key Lab for Theory and Technology of Advanced Batteries Materials, College of Engineering, Peking University , Beijing 100871, People's Republic of China.
authors.forename: Zhonghong
authors.initials: Z
authors.lastname: Xia
authors.affiliation: Beijing Key Lab for Theory and Technology of Advanced Batteries Materials, College of Engineering, Peking University , Beijing 100871, People's Republic of China.
authors.forename: Peikai
authors.initials: P
authors.lastname: Chen
authors.affiliation: Beijing Key Lab for Theory and Technology of Advanced Batteries Materials, College of Engineering, Peking University , Beijing 100871, People's Republic of China.
authors.forename: Dingguo
authors.initials: D
authors.lastname: Xia
keywords: Co3Mo2OxN6−x /C; alkaline fuel cell; catalyst; layered transition metal oxynitride; oxygen reduction reaction