Facile synthesis of well dispersed spinel cobalt manganese oxides microsphere as efficient bi-functional electrocatalysts for oxygen reduction reaction and oxygen evolution reaction

作者：Yang, Shuting; Wang, Zhichao; Cao, Zhaoxia^*; Mao, Xinxin; Shi, Mengjiao; Li, Yanlei; Zhang, Ruirui; Yin, Yanhong^*

来源：Journal of Alloys and Compounds, 2017, 721: 482-491.

DOI：10.1016/j.jallcom.2017.05.221

• Spinel cobalt manganese oxides
• Electrocatalyst
• ORR
• OER

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 (5 mA cm(-2)) and a better stability comparable to commercial Pt/C (20 wt% Pt on carbon) catalyst.

• 出版日期2017-10-15
• 单位河南师范大学