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

Title
Electrocatalytic hydrogen evolution using graphitic carbon nitride coupled with nanoporous graphene co-doped by S and Se
Author
이정호
Keywords
OXYGEN REDUCTION; EFFICIENT ELECTROCATALYST; MOLYBDENUM PHOSPHIDE; MOS2 NANOSHEETS; CATALYST; OXIDATION; NITROGEN; OXIDE; NANOPARTICLES; ELECTRODES
Issue Date
2015-05
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v. 3, No. 24. Page. 12810-12819
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.
URI
http://pubs.rsc.org/-/content/articlehtml/2015/ta/c5ta02656chttp://repository.hanyang.ac.kr/handle/20.500.11754/100759
ISSN
2050-7488; 2050-7496
DOI
10.1039/c5ta02656c
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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