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Park, Noejung
Computational Physics & Electronic Structure Lab
Research Interests
  • Electronic structure calculation, computational physics, computational material science

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Ruthenium anchored on carbon nanotube electrocatalyst for hydrogen production with enhanced Faradaic efficiency

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Title
Ruthenium anchored on carbon nanotube electrocatalyst for hydrogen production with enhanced Faradaic efficiency
Author
Kweon, Do HyungOkyay, Mahmut SaitKim, Seok-JinJeon, Jong-PilNoh, Hyuk-JunPark, NoejungMahmood, JaveedBaek, Jong-Beom
Issue Date
2020-03
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE COMMUNICATIONS, v.11, no.1, pp.1278
Abstract
Developing efficient and stable electrocatalysts is crucial for the electrochemical production of pure and clean hydrogen. For practical applications, an economical and facile method of producing catalysts for the hydrogen evolution reaction (HER) is essential. Here, we report ruthenium (Ru) nanoparticles uniformly deposited on multi-walled carbon nanotubes (MWCNTs) as an efficient HER catalyst. The catalyst exhibits the small overpotentials of 13 and 17 mV at a current density of 10 mA cm(-2) in 0.5M aq. H2SO4 and 1.0M aq. KOH, respectively, surpassing the commercial Pt/C (16 mV and 33 mV). Moreover, the catalyst has excellent stability in both media, showing almost "zeroloss" during cycling. In a real device, the catalyst produces 15.4% more hydrogen per power consumed, and shows a higher Faradaic efficiency (92.28%) than the benchmark Pt/C (85.97%). Density functional theory calculations suggest that Ru-C bonding is the most plausible active site for the HER.
URI
https://scholarworks.unist.ac.kr/handle/201301/31665
URL
https://www.nature.com/articles/s41467-020-15069-3
DOI
10.1038/s41467-020-15069-
ISSN
2041-1723
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PHY_Journal Papers
ECHE_Journal Papers
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