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Revealing the Contribution of Individual Factors to Hydrogen Evolution Reaction Catalytic Activity
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.
Yale Univ, Dept Mech Engn & Mat Sci, New Haven, CT 06511 USA;Energy Sci Inst, Yale West Campus, West Haven, CT 06525 USA.
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2018 (Engelska)Ingår i: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 30, nr 18, artikel-id 1706076Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

For the electrochemical hydrogen evolution reaction (HER), the electrical properties of catalysts can play an important role in influencing the overall catalytic activity. This is particularly important for semiconducting HER catalysts such as MoS2, which has been extensively studied over the last decade. Herein, on-chip microreactors on two model catalysts, semiconducting MoS2 and semimetallic WTe2, are employed to extract the effects of individual factors and study their relations with the HER catalytic activity. It is shown that electron injection at the catalyst/current collector interface and intralayer and interlayer charge transport within the catalyst can be more important than thermodynamic energy considerations. For WTe2, the site-dependent activities and the relations of the pure thermodynamics to the overall activity are measured and established, as the microreactors allow precise measurements of the type and area of the catalytic sites. The approach presents opportunities to study electrochemical reactions systematically to help establish rational design principles for future electrocatalysts.

Ort, förlag, år, upplaga, sidor
WILEY-V C H VERLAG GMBH , 2018. Vol. 30, nr 18, artikel-id 1706076
Nyckelord [en]
2D TMD materials, electrochemical microreactors, hydrogen evolution reaction, individual factors, overall performance
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Fysikalisk kemi
Identifikatorer
URN: urn:nbn:se:uu:diva-356393DOI: 10.1002/adma.201706076ISI: 000431615100009PubMedID: 29573299OAI: oai:DiVA.org:uu-356393DiVA, id: diva2:1235462
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VetenskapsrådetStandUpTillgänglig från: 2018-07-25 Skapad: 2018-07-25 Senast uppdaterad: 2018-07-25Bibliografiskt granskad

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Silva, Jose LuisBrena, BarbaraAraujo, Carlos Moyses

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