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Operando Characteri...
Operando Characterization of an Amorphous Molybdenum Sulfide Nanoparticle Catalyst during the Hydrogen Evolution Reaction
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Casalongue, Hernan G. Sanchez (author)
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Benck, Jesse D. (author)
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Tsai, Charlie (author)
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- Karlsson, Rasmus K. B. (author)
- KTH,Tillämpad elektrokemi
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Kaya, Sarp (author)
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Ng, May Ling (author)
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- Pettersson, Lars G. M. (author)
- Stockholms universitet,Fysikum
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Abild-Pedersen, Frank (author)
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Norskov, J. K. (author)
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Ogasawara, Hirohito (author)
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Jaramillo, Thomas F. (author)
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Nilsson, Anders (author)
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(creator_code:org_t)
- 2014-11-12
- 2014
- English.
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In: The Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 118:50, s. 29252-29259
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
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- Molybdenum sulfide structures, particularly amorphous MoS3 nanoparticles, are promising materials in the search for cost-effective and scalable water-splitting catalysts. Ex situ observations show that the nanoparticles exhibit a composition change from MoS3 to defective MoS2 when subjected to hydrogen evolution reaction (HER) conditions, raising questions regarding the active surface sites taking part in the reaction. We tracked the in situ transformation of amorphous MoS3 nanoparticles under HER conditions through ambient pressure X-ray photoelectron spectroscopy and performed density functional theory studies of model MoSx systems. We demonstrate that, under operating conditions, surface sites are converted from MoS3 to MoS2 in a gradual manner and that the electrolytic current densities are proportional to the extent of the transformation. We also posit that it is the MoS2 edge-like sites that are active during HER, with the high activity of the catalyst being attributed to the increase in surface MoS2 edge-like sites after the reduction of MoS3 sites.
Subject headings
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Casalongue, Hern ...
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Benck, Jesse D.
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Tsai, Charlie
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Karlsson, Rasmus ...
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Kaya, Sarp
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Ng, May Ling
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show more...
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Pettersson, Lars ...
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Abild-Pedersen, ...
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Norskov, J. K.
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Ogasawara, Hiroh ...
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Jaramillo, Thoma ...
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Nilsson, Anders
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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 Physical Chemist ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
- Articles in the publication
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The Journal of P ...
- By the university
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Royal Institute of Technology
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Stockholm University