Atomic cobalt on nitrogen-doped graphene for hydrogen generation

Huilong Fei, Juncai Dong, M. Josefina Arellano-Jiménez, Gonglan Ye, Nam Dong Kim, Errol L.G. Samuel, Zhiwei Peng, Zhuan Zhu, Fan Qin, Jiming Bao, Miguel Jose Yacaman, Pulickel M. Ajayan, Dongliang Chen () and James M. Tour ()
Additional contact information
Huilong Fei: Rice University
Juncai Dong: Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences
M. Josefina Arellano-Jiménez: University of Texas at San Antonio
Gonglan Ye: Rice University
Nam Dong Kim: Rice University
Errol L.G. Samuel: Rice University
Zhiwei Peng: Rice University
Zhuan Zhu: University of Houston
Fan Qin: University of Houston
Jiming Bao: University of Houston
Miguel Jose Yacaman: University of Texas at San Antonio
Pulickel M. Ajayan: Rice University
Dongliang Chen: Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences
James M. Tour: Rice University

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract Reduction 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.

Date: 2015
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DOI: 10.1038/ncomms9668

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