dc.citation.conferencePlace |
KO |
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dc.citation.title |
2017 Spring Meeting of the Korean Chemical Society |
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dc.contributor.author |
백두산 |
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dc.contributor.author |
서보라 |
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dc.contributor.author |
주상훈 |
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dc.date.accessioned |
2023-12-19T19:09:00Z |
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dc.date.available |
2023-12-19T19:09:00Z |
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dc.date.created |
2018-01-09 |
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dc.date.issued |
2017-04-20 |
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dc.description.abstract |
More sluggish reaction kinetics and inferior stability of Pt catalysts for alkaline hydrogen evolution reaction (HER) compared to acidic HER represent a great challenge in alkaline electrolyzer technologies, which is an essential element in sustainable hydrogen economy. In this presentation, we have synthesized mesostructured molybdenum carbide supported Pt (Pt/MMC) catalyst for alkaline HER, and demonstrate that the alkaline HER activity of Pt nanoparticle catalyst can be promoted by exploiting metal−support interaction between Pt nanoparticles and molybdenum carbide support. X-ray absorption near edge structure and X-ray photoelectron spectroscopy analyses revealed that Pt atoms exist in more reduced oxidation states in Pt/MMC than those in commercial Pt/C catalysts (Pt nanoparticles dispersed on carbon black). Compared to carbon black support, MMC could donate more electrons to nearby Pt atoms, elevating d-band center of Pt. Electrochemical measurements demonstrated that mass activity and specific activity of the Pt/MMC are 1.6- and 1.5-fold higher than those of commercial Pt/C with the same Pt loading, respectively. This result suggested that the adsorption/desorption strength of reactants (i.e. hydrogen) and reaction intermediates (i.e. hydroxide) was adjusted to the optimized level for efficient HER in alkaline media. |
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dc.identifier.bibliographicCitation |
2017 Spring Meeting of the Korean Chemical Society |
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dc.identifier.uri |
https://scholarworks.unist.ac.kr/handle/201301/38498 |
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dc.language |
영어 |
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dc.publisher |
대한화학회 |
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dc.title |
Metal-Support Interaction between Platinum and Mesoporous Molybdenum Carbide for Efficient Alkaline Hydrogen Evolution Reaction |
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dc.type |
Conference Paper |
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dc.date.conferenceDate |
2017-04-19 |
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