期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 241, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2023.124604
关键词
Oxygen evolution reaction; Oxygen reduction reaction; Synergistic effects
A novel porous carbon microspheres (CMS2) modified by NiCo2O4 nanoflower (CMS2-NiCo2O4) were prepared as an ORR and OER catalyst. The efficient oxygen catalytic activity is gained by creating a coupling interface between NiCo2O4 and CMS. The optimized CMS2-NiCo2O4 shows excellent performance in zinc-air batteries.
It is significant to explore and design outstanding bifunctional oxygen electrocatalysts to promote the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) in zinc-air batteries. Herein, a novel porous carbon microspheres (CMS2) modified by NiCo2O4 nanoflower (CMS2-NiCo2O4) have been prepared as an ORR and OER catalyst. The hierarchical porous structure of CMS provides high conductivity and abundant active sites for ORR, whereas the synergistic effect of NiCo2O4 nanosheets and a small amount of Fe-Zn oxides act as the positive phase for OER. The efficient oxygen catalytic activity is gained by creating a coupling interface between NiCo2O4 and CMS. The optimized CMS2-NiCo2O4 shows a half-wave potential of 0.82 V toward ORR and an overpotential of 392 mV toward OER. Particularly, CMS2-NiCo2O4 also exhibits an excellent peak power density (175.5 mW cm-2) as a catalyst for zinc-air batteries, which is superior to the commercial Pt/C + RuO2 catalyst (120.5 mW cm-2), and it also demonstrates a remarkable stability even after the charge-discharge cycles of 167 h. The prepared CMS2-NiCo2O4 is promising for the application of the bimetallic oxide catalyst for zinc-air battery.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据