Electrocatalytic hydrogen evolution using graphitic carbon nitride coupled with nanoporous graphene co-doped by S and Se
- Authors
- Shinde, S. S.; Sami, Abdul; Lee, Jung-Ho
- Issue Date
- May-2015
- Publisher
- Royal Society of Chemistry
- Keywords
- OXYGEN REDUCTION; EFFICIENT ELECTROCATALYST; MOLYBDENUM PHOSPHIDE; MOS2 NANOSHEETS; CATALYST; OXIDATION; NITROGEN; OXIDE; NANOPARTICLES; ELECTRODES
- Citation
- Journal of Materials Chemistry A, v.3, no.24, pp.12810 - 12819
- Indexed
- SCIE
SCOPUS
- Journal Title
- Journal of Materials Chemistry A
- Volume
- 3
- Number
- 24
- Start Page
- 12810
- End Page
- 12819
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/20679
- DOI
- 10.1039/c5ta02656c
- ISSN
- 2050-7488
- 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 x 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.
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