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Hydrogen evolution ...
Hydrogen evolution mediated by sulfur vacancies and substitutional Mn in few-layered molybdenum disulfide
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- Rafei, Mouna (författare)
- Umeå universitet,Institutionen för fysik
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- Piñeiro-García, Alexis (författare)
- Umeå universitet,Institutionen för fysik
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- Wu, Xiuyu, 1991- (författare)
- Umeå universitet,Institutionen för fysik
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- Perivoliotis, Dimitrios K. (författare)
- Umeå universitet,Institutionen för fysik
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- Wågberg, Thomas, 1971- (författare)
- Umeå universitet,Institutionen för fysik
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- Gracia-Espino, Eduardo (författare)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- Elsevier, 2024
- 2024
- Engelska.
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Ingår i: Materials Today Energy. - : Elsevier. - 2468-6069. ; 41
- Relaterad länk:
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https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- MoS2 is widely praised as a promising replacement for Pt as an electrocatalyst for the hydrogen evolution reaction (HER), but even today, it still suffers from low performance. This issue is tackled by using Mn3+ as a surface modifier to trigger sulfur vacancy formation and enhance electron transport in few-layered 2H MoS2. Only 10% of Mn is sufficient to transform the semiconductive MoS2 into an active HER electrocatalyst. The insertion of Mn reduces both HER onset potential and Tafel slope which allows reaching 100 mA/cm2 at an overpotential of 206 mV, ten times larger of what undoped MoS2 can achieve. The enhanced activity arises because Mn3+ introduces electronic states near the conduction band, promotes sulfur vacancies, and increases the hydrogen adsorption. In addition to its facile production and extended shelf-life, Mn–MoS2 exhibits an efficiency of 73% at 800 mA/cm2 and 2.0 V when used in proton exchange membrane water electrolyzers.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Nyckelord
- Hydrogen evolution reaction
- Manganese
- Proton exchange membrane
- Sulfur vacancy
- Water electrolysis
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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