Atomic cobalt on nitrogen-doped graphene for hydrogen generation

Nature Communications - Tập 6 Số 1
Huilong Fei1, Juncai Dong2, M. Josefina Arellano-Jiménez3, Gonglan Ye4, Nam Dong Kim1, Errol L. G. Samuel1, Zhiwei Peng1, Zhuan Zhu5, Fan Qin5, Jiming Bao5, Miguel José Yacamán3, Pulickel M. Ajayan4, Dongliang Chen2, James M. Tour4
1Department of Chemistry, Rice University, 6100 Main Street, Houston, 77005, Texas, USA
2Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
3Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, 78249, Texas, USA
4Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, 77005, Texas, USA
5Department of Electrical and Computer Engineering, University of Houston, Houston, 77204, Texas, USA

Tóm tắt

AbstractReduction of water to hydrogen through electrocatalysis holds great promise for clean energy, but its large-scale application relies on the development of inexpensive and efficient catalysts to replace precious platinum catalysts. Here we report an electrocatalyst for hydrogen generation based on very small amounts of cobalt dispersed as individual atoms on nitrogen-doped graphene. This catalyst is robust and highly active in aqueous media with very low overpotentials (30 mV). A variety of analytical techniques and electrochemical measurements suggest that the catalytically active sites are associated with the metal centres coordinated to nitrogen. This unusual atomic constitution of supported metals is suggestive of a new approach to preparing extremely efficient single-atom catalysts.

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Tập 6 Số 1

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