期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 4, 期 32, 页码 12583-12590出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta04654a
关键词
-
资金
- Natural Science Foundation of China [51272167, 51572181]
- Natural Science Foundation of Jiangsu Province, China [BK20141199, BK20151226]
- Natural Science Foundation of the Higher Education Institutions of Jiangsu Province, China [14KJB480005]
The sluggish kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) has been one of the bottlenecks hindering the commercial application of rechargeable metal-air batteries. It is urgent and necessary to develop non-noble bifunctional catalysts for both the ORR and the OER with high catalytic activity. Herein, an in situ synthetic route to obtain Mo2C-C hybrid microspheres as bifunctional catalysts has been reported. In this route, the synchronously prepared C microspheres act not only as the template, but also as the reactant. Interestingly, SEM, TEM and XPS results show that core-shell, yolk-shell and pierced structured microspheres could be formed by increasing the content of Mo2C in the Mo2C-C hybrids. Additionally, the formation of a non-crystalline amorphous MoOx (MoO2 and MoO3) nano-film appears to improve the conductivity of the as-prepared Mo2C-C hybrids. Rotating-ring-disk electrode (RRDE) results show that the Mo2C-C hybrids exhibit enhanced catalytic activity for the ORR and OER compared with that of the C microspheres and Mo2C. In particular, Mo2CC-5 displays excellent bifunctional activity and stability, which is close to the behavior of a commercial Pt/ C electrocatalyst for the ORR and a RuO2 electrocatalyst for the OER.
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