Hydrogen evolution by a metal-free electrocatalyst
Zheng, Yao, Jiao, Yan, Zhu, Yihan, Li, Lu Hua, Han, Yu, Chen, Ying, Du, Aijun, Jaroniec, Mietek, & Qiao, Shi Zhang (2014) Hydrogen evolution by a metal-free electrocatalyst. Nature Communications, 5(3783).
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.
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|Item Type:||Journal Article|
|ISSN:||2041-1723 (online) 1083-8155 (print)|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2014 Nature Publishing Group|
|Copyright Statement:||Author's Pre-print: author can archive pre-print (ie pre-refereeing)
Author's Post-print: subject to Restrictions below, author can archive post-print (ie final draft post-refereeing)
Restrictions: •6 months embargo
Publisher's Version/PDF: author cannot archive publisher's version/PDF
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|Deposited On:||29 Apr 2014 23:29|
|Last Modified:||18 Mar 2015 04:31|
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