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Hydrogen evolution by a metal-free electrocatalyst

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journal contribution
posted on 01.01.2014, 00:00 authored by Y Zheng, Y Jiao, Y Zhu, Luhua LiLuhua Li, Y Han, Ying (Ian) ChenYing (Ian) Chen, A Du, M Jaroniec, S Z Qiao
Electrocatalytic reduction of water to molecular hydrogen via the hydrogen evolution reaction may provide a sustainable energy supply for the future, but its commercial application is hampered by the use of precious platinum catalysts. All alternatives to platinum thus far are based on nonprecious metals, and, to our knowledge, there is no report about a catalyst for electrocatalytic hydrogen evolution beyond metals. Here we couple graphitic-carbon nitride with nitrogen-doped graphene to produce a metal-free hybrid catalyst, which shows an unexpected hydrogen evolution reaction activity with comparable overpotential and Tafel slope to some of well-developed metallic catalysts. Experimental observations in combination with density functional theory calculations reveal that its unusual electrocatalytic properties originate from an intrinsic chemical and electronic coupling that synergistically promotes the proton adsorption and reduction kinetics.

History

Journal

Nature communications

Volume

5

Article number

3783

Pagination

1 - 22

Publisher

Nature Publishing Group

Location

London, England

eISSN

2041-1723

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2014, Nature Publishing Group