KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Chemical Science Program
Advanced Membranes and Porous Materials Research Center
Nanostructured Functional Materials (NFM) laboratory
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AbstractElectrocatalytic 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. © 2014 Macmillan Publishers Limited. All rights reserved.
SponsorsThis research is financially supported by Australian Research Council (DP1095861, DP130104459). NEXAFS measurements were undertaken on the soft X-ray beamline at Australian Synchrotron. DFT calculations were undertaken on the NCI National Facility systems through the National Computational Merit Allocation Scheme.
PublisherNature Publishing Group
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