li-hydrogenevolutionby-2014.pdf (2.33 MB)
Hydrogen evolution by a metal-free electrocatalyst
journal contribution
posted on 2014-01-01, 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 QiaoElectrocatalytic 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 communicationsVolume
5Article number
3783Pagination
1 - 22Publisher
Nature Publishing GroupLocation
London, EnglandPublisher DOI
Link to full text
eISSN
2041-1723Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2014, Nature Publishing GroupUsage metrics
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No categories selectedKeywords
CatalysisElectrochemistryGraphiteHydrogenKineticsMicroscopy, Electron, TransmissionMolecular StructureNitrilesNitrogenPhotoelectron SpectroscopyWaterX-Ray Absorption SpectroscopyScience & TechnologyMultidisciplinary SciencesScience & Technology - Other TopicsACTIVE EDGE SITESCATALYTIC-ACTIVITYOXYGEN REDUCTIONWATER OXIDATIONH-2 PRODUCTIONGRAPHENECARBONNANOSHEETSDESIGNMOS2
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