Hits:

Indexed by:Journal Papers

Date of Publication:2020-04-15

Journal:APPLIED SURFACE SCIENCE

Included Journals:EI、SCIE

Volume:509

ISSN No.:0169-4332

Key Words:Electrocatalysis; Oxygen reduction reaction; Porous carbon; ZnS; Heteroatom doping

Abstract:Developing low cost, environmentally friendly and high efficiency oxygen reduction reaction (ORR) electrocatalysts is critical for clean energy conversion and storage devices including fuel cells and metal-air batteries. Herein, we developed a facile method to doping N, S and ZnS into carbon framework simultaneously. The N, S co-doping and extra ZnS active sites could prominently enhance the ORR performance of the carbon. The optimized sample ZnS@NC-3 exhibit an onset potential of 0.94 V and a half-wave potential of 0.84 V, which is comparable to 20 wt% PVC. In addition, the methanol tolerance and cycle ability are obvious superior than that of PVC. Moreover, when used as electrocatalysts for Zn-air battery, the battery exhibits an open circuit voltage of 1.524 V, a high specific capacity of 736 mA h g(-1) and a max power density of 176 mW cm(-2), demonstrating its great potential for clean energy conversion.