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Atomic layered tita...
Atomic layered titanium sulfide quantum dots as electrocatalysts for enhanced hydrogen evolution reaction
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Liu, Yang (author)
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Liang, Chenglu (author)
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Wu, Jingjie (author)
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- Sharifi, Tiva (author)
- Umeå universitet,Institutionen för fysik,Department of Materials Science and NanoEngineering, Rice University, Houston, TX, USA
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Xu, Hui (author)
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Nakanishi, Yusuke (author)
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Yang, Yingchao (author)
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Woellne, Cristiano F. (author)
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Aliyan, Amir (author)
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Martí, Angel A. (author)
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Xie, Banghu (author)
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Vajtai, Robert (author)
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Yang, Wei (author)
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Ajayan, Pulickel M. (author)
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(creator_code:org_t)
- 2017-10-25
- 2018
- English.
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In: Advanced Materials Interfaces. - : John Wiley & Sons. - 2196-7350. ; 5:1
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The overall electrocatalytic activity toward hydrogen evolution reaction for layered transition metal dichalcogenides is governed by their intrinsic activity, the corresponding density of active sites, and the electron transfer resistance. Here, nanoengineering strategies to scale down both the lateral size and thickness of layered 1T-TiS2 powder to quantum dots (QDs) by bath sonication and probing sonication incision are employed. Uniform lateral size of 3-6 nm in the resulting QDs enhances the density of edge sites while the atomic layer thickness (1-2 nm) facilitates the electron transfer from the substrate to the edge sites. The obtained TiS2 QDs exhibit superior hydrogen evolution reaction activity over TiS2 nanosheets and MoS2 QDs prepared by the same method. The turnover frequency of TiS2 QDs with a small loading of 0.7 ng cm(-2) in an optimal deposition on electrode reached approximate to 2.0 s(-1) at an overpotential of -0.2 V versus RHE, several orders of magnitude higher than TiS2 nanosheets (0.01 s(-1)) and MoS2 QDs (0.07 s(-1)).
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- atomic layer
- electrocatalysis
- hydrogen evolution reaction
- quantum dots
- transition metal chalcogenides
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Liu, Yang
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Liang, Chenglu
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Wu, Jingjie
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Sharifi, Tiva
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Xu, Hui
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Nakanishi, Yusuk ...
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show more...
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Yang, Yingchao
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Woellne, Cristia ...
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Aliyan, Amir
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Martí, Angel A.
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Xie, Banghu
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Vajtai, Robert
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Yang, Wei
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Ajayan, Pulickel ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Physical Chemist ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
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Advanced Materia ...
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Umeå University