期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 4, 期 42, 页码 16516-16523出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta06314d
关键词
-
资金
- Innovation Funding of HUST for International Collaborations [2014ZZGH018]
- National Natural Science Foundation of China [51371084, 91545131]
Transition metal oxides with hierarchically porous structures supported by conductive substrates have been considered as promising electrodes for electrochemical energy storage and catalysis. Herein we configure porous Co3O4/C nanowire arrays (NAs) by thermally annealing a Co-based metal-organic framework (Co-MOF) in Ar and air, respectively. The hybrid Co3O4/C NAs demonstrate a high specific capacitance of 1.32 F cm(-2) at a current density of 1 mA cm(-2), which is much superior to that of bare Co3O4 NAs. A highly stable symmetric supercapacitor based on Co3O4/C exhibits an excellent durability with only 21.7% capacitance decay after 5000 cycles. Besides electrochemical energy storage, the Co3O4/C hybrids demonstrate an outstanding electrochemical catalysis ability for the oxygen evolution reaction, identified by the high current density of 30 mA cm(-2) at low overpotential (eta(30) = 318 mV) and a small Tafel slope (81 mV dec(-1)). The electrical conductivity of the interconnected C infrastructures and ion diffusion within the hierarchical pores are intrinsic causes to promote the pseudo-capacitive performance and enhance catalytic activity. The synthesis strategy reported here opens an avenue to design high performance electrodes for energy storage and electrochemical catalysis.
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