Ultrathin two-dimensionalcobalt-organic framework nanosheets for high-performance electrocatalytic oxygen evolution

School of Chemistry and Chemical Engineering, Yangzhou University

Ultrathin two-dimensional cobalt-organic framework (Co-MOF) nanosheets[Co₂(OH)₂BDC, BDC = 1,4-benzenedicarboxylate]with good catalytic activity for the oxygen evolution reaction were synthesized by a simple surfactant-assisted hydrothermal method. The resulting material shows a low overpotential of 263 mV at 10 mA cm^-2and a Tafel slope of 74 mV dec^-1in 1.0 M KOH. The morphology and properties of the material before and after electrocatalysis did not change significantly over a long period of time and maintained electrochemical stability in 12000 s. Theunsaturated Co^IIactive center on the surface of ultrathintwo-dimensional cobalt-organic frameworknanosheets enhances theoxygen evolution reactionperformance.These results are significantly superior to most of the previously reported transition metal-organic framework or metal oxide electrocatalysts. We believe that the ultrathintwo-dimensional metal-organic frameworknanosheets synthesized by the simple process will be widely used in future energy conversion devices.

J. Mater. Chem. A2018, DOI: 10.1039/c8ta03128b; IF：9.93，SCI

链接:http://dx.doi.org/10.1039/C8TA03128B

Yuxia Xu, Bing Li, Shasha Zheng,Ping Wu, Jingyi Zhan,Huaiguo Xue,Qiang Xu, and Huan Pang*