uu.seUppsala universitets publikationer
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Unveiling the Interfacial Effects for Enhanced Hydrogen Evolution Reaction on MoS2/WTe2 Hybrid Structures
Yale Univ, Dept Mech Engn & Mat Sci, New Haven, CT 06511 USA;Energy Sci Inst, Yale West Campus, West Haven, CT 06525 USA.
Yale Univ, Dept Mech Engn & Mat Sci, New Haven, CT 06511 USA;Energy Sci Inst, Yale West Campus, West Haven, CT 06525 USA.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Materialteori.
Yale Univ, Dept Mech Engn & Mat Sci, New Haven, CT 06511 USA;Energy Sci Inst, Yale West Campus, West Haven, CT 06525 USA.
Visa övriga samt affilieringar
2019 (Engelska)Ingår i: Small, ISSN 1613-6810, E-ISSN 1613-6829, Vol. 15, nr 19, artikel-id 1900078Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Using the MoS2-WTe2 heterostructure as a model system combined with electrochemical microreactors and density function theory calculations, it is shown that heterostructured contacts enhance the hydrogen evolution reaction (HER) activity of monolayer MoS2. Two possible mechanisms are suggested to explain this enhancement: efficient charge injection through large-area heterojunctions between MoS2 and WTe2 and effective screening of mirror charges due to the semimetallic nature of WTe2. The dielectric screening effect is proven minor, probed by measuring the HER activity of monolayer MoS2 on various support substrates with dielectric constants ranging from 4 to 300. Thus, the enhanced HER is attributed to the increased charge injection into MoS2 through large-area heterojunctions. Based on this understanding, a MoS2/WTe2 hybrid catalyst is fabricated with an HER overpotential of -140 mV at 10 mA cm(-2), a Tafel slope of 40 mV dec(-1), and long stability. These results demonstrate the importance of interfacial design in transition metal dichalcogenide HER catalysts. The microreactor platform presents an unambiguous approach to probe interfacial effects in various electrocatalytic reactions.

Ort, förlag, år, upplaga, sidor
WILEY-V C H VERLAG GMBH , 2019. Vol. 15, nr 19, artikel-id 1900078
Nyckelord [en]
electrochemical microreactors, heterostructures, hydrogen evolution reaction, interfacial effects, MoS2, WTe2 hybrid
Nationell ämneskategori
Fysikalisk kemi Materialkemi
Identifikatorer
URN: urn:nbn:se:uu:diva-390541DOI: 10.1002/smll.201900078ISI: 000472198100006PubMedID: 30957970OAI: oai:DiVA.org:uu-390541DiVA, id: diva2:1341981
Forskningsfinansiär
VetenskapsrådetStandUpTillgänglig från: 2019-08-12 Skapad: 2019-08-12 Senast uppdaterad: 2019-08-12Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextPubMed

Personposter BETA

Silva, Jose LuisBrena, BarbaraAraujo, Carlos Moyses

Sök vidare i DiVA

Av författaren/redaktören
Silva, Jose LuisBrena, BarbaraAraujo, Carlos Moyses
Av organisationen
Materialteori
I samma tidskrift
Small
Fysikalisk kemiMaterialkemi

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
pubmed
urn-nbn

Altmetricpoäng

doi
pubmed
urn-nbn
Totalt: 5 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf