Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5458623 | Journal of Alloys and Compounds | 2017 | 10 Pages |
Abstract
Developing catalysts with high bi-functional electrocatalytic activity for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is essential for the fuel cells and metal-air batteries because of the sluggish kinetics of oxygen electrochemical reaction. Herein, we prepared a porous and well dispersed spinel MnCo2O4 (MCO) catalyst through a facile solvothermal method followed by a calcination process. CH3COONH4 used in solvothermal process played an important role in control of the size and morphology of MCO. The as-prepared MCO submicrospheres feature a porous structure and a high specific surface area. Tested by the rotating ring disk electrode (RRDE) technique, the sample MCO-10 and MCO-5 shows best catalytic towards ORR and OER, respectively. In particular, MCO-10 exhibits a high diffusion limiting current density (5Â mAÂ cmâ2) and a better stability comparable to commercial Pt/C (20Â wt% Pt on carbon) catalyst.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Shuting Yang, Zhichao Wang, Zhaoxia Cao, Xinxin Mao, Mengjiao Shi, Yanlei Li, Ruirui Zhang, Yanhong Yin,