Phosphorus and Nitrogen Dual Doped and Simultaneously Reduced Graphene Oxide with High Surface Area as Efficient Metal-Free Electrocatalyst for Oxygen Reduction

Catalysts

Xiaochang Qiao²  Shijun Liao¹  Chenghang You²  Rong Chen² 

[1]The Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China

关键词: phosphorus and nitrogen dual doped;    graphene;    carbon catalyst;    fuel cell;    oxygen reduction reaction;   

DOI  :  10.3390/catal5020981

来源: mdpi

【 摘 要 】

A P, N dual doped reduced graphene oxide (PN-rGO) catalyst with high surface area (376.20 m²·g⁻¹), relatively high P-doping level (1.02 at. %) and a trace amount of N (0.35 at. %) was successfully prepared using a one-step method by directly pyrolyzing a homogenous mixture of graphite oxide (GO) and diammonium hydrogen phosphate ((NH₄)₂HPO₄) in an argon atmosphere, during which the thermal expansion, deoxidization of GO and P, N co-doping were realized simultaneously. The catalyst exhibited enhanced catalytic performances for oxygen reduction reaction (ORR) via a dominated four-electron reduction pathway, as well as superior long-term stability, better tolerance to methanol crossover than that of commercial Pt/C catalyst in an alkaline solution.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.