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Issue 24, 2015
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Electrocatalytic hydrogen evolution using graphitic carbon nitride coupled with nanoporous graphene co-doped by S and Se

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Abstract

Electrocatalytic hydrogen evolution using non-precious metals or metal-free catalysts is critically necessary because platinum-based electrocatalysts are greatly limited in scalable commercialization of hydrogen generation due to their high cost. Here, we report the facile synthesis of metal-free hybrid catalysts, in which graphitic carbon nitride (g-C3N4) is coupled with nanoporous graphene doped by S and Se. The S and Se co-doped hybrid catalyst (g-C3N4@S–Se-pGr) reveals superior electrocatalytic performances, including an exchange current density of 6.27 × 10−6 A cm−2, an on-set potential of 0.092 V, a Tafel slope of 86 mV dec−1, an adsorption free energy of −0.13 eV, and long-term stability comparable to those of commercial Pt/C catalysts. Volcano plots showing the hydrogen evolution activity versus adsorption free energy are also compatible with those of the conventional metal catalysts. Our strategy has the potential to allow a new paradigm for the development of high-performance metal-free electrocatalysts for energy conversion devices.

Graphical abstract: Electrocatalytic hydrogen evolution using graphitic carbon nitride coupled with nanoporous graphene co-doped by S and Se

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Publication details

The article was received on 13 apr. 2015, accepted on 08 maí 2015 and first published on 11 maí 2015


Article type: Paper
DOI: 10.1039/C5TA02656C
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J. Mater. Chem. A, 2015,3, 12810-12819

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    Electrocatalytic hydrogen evolution using graphitic carbon nitride coupled with nanoporous graphene co-doped by S and Se

    S. S. Shinde, A. Sami and J. Lee, J. Mater. Chem. A, 2015, 3, 12810
    DOI: 10.1039/C5TA02656C

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