Highly Active and Stable Hydrogen Evolution Electrocatalysts Based on Molybdenum Compounds on Carbon Nanotube-Graphene Hybrid Support
SCIE
SCOPUS
- Title
- Highly Active and Stable Hydrogen Evolution Electrocatalysts Based on Molybdenum Compounds on Carbon Nanotube-Graphene Hybrid Support
- Authors
- Youn, DH; Han, Seunghoon; Kim, JY; Kim, JY; Park, Hunmin; Choi, SH; Lee, Jae Sung
- Date Issued
- 2014-05
- Publisher
- AMER CHEMICAL SOC
- Abstract
- Highly active and stable electrocatalysts for hydrogen evolution have been developed on the basis of molybdenum compounds (MO2C, MO2N, and MoS2) on carbon nanotube (CNT)-graphene hybrid support via a modified urea-glass route. By a simple modification of synthetic variables, the final phases are easily controlled from carbide, nitride to sulfide with homogeneous dispersion of nanocrystals on the CNT-graphene support. Among the prepared catalysts, Mo2C/CNT-graphene shows the highest activity for hydrogen evolution reaction with a small onset overpotential of 62 mV and Tafel slope of 58 mV/dec as well as an excellent stability in acid media. Such enhanced catalytic activity may originate from its low hydrogen binding energy and high conductivity. Moreover, the CNT-graphene hybrid support plays crucial roles to enhance the activity of molybdenum compounds by alleviating aggregation of the nanocrystals, providing a large area to contact with electrolyte, and facilitating the electron transfer.
- Keywords
- TRANSITION-METAL CARBIDES; TUNGSTEN CARBIDE; NANOPARTICLES; REDUCTION; EFFICIENT; MOS2; CATALYST; WATER; OXIDE; NITRIDES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/92281
- DOI
- 10.1021/NN5012144
- ISSN
- 1936-0851
- Article Type
- Article
- Citation
- ACS NANO, vol. 8, no. 5, page. 5164 - 5173, 2014-05
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- There are no files associated with this item.
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