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Thermoelectricity Enhanced Electrocatalysis
Umeå University, Faculty of Science and Technology, Department of Physics. Department of Material Science and Nanoengineering, Rice University, Houston, Texas, United States.
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2017 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 17, no 12, p. 7908-7913Article in journal (Refereed) Published
Abstract [en]

We show that thermoelectric materials can function as electrocatalysts and use thermoelectric voltage generated to initiate and boost electrocatalytic reactions. The electrocatalytic activity is promoted by the use of nanostructured thermoelectric materials in a hydrogen evolution reaction (HER) by the thermoelectricity generated from induced temperature gradients. This phenomenon is demonstrated using two-dimensional layered thermoelectric materials Sb2Te3 and Bi0.5Sb1.5Te3 where a current density approaching ∼50 mA/cm2 is produced at zero potential for Bi0.5Sb1.5Te3 in the presence of a temperature gradient of 90 °C. In addition, the turnover frequency reaches to 2.7 s–1 at 100 mV under this condition which was zero in the absence of temperature gradient. This result adds a new dimension to the properties of thermoelectric materials which has not been explored before and can be applied in the field of electrocatalysis and energy generation.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2017. Vol. 17, no 12, p. 7908-7913
Keyword [en]
Thermoelectrocatalysis, thermoelectric materials, electrocatalysis, temperature gradient, hydrogen olution reaction
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:umu:diva-143944DOI: 10.1021/acs.nanolett.7b04244ISI: 000418393300102PubMedID: 29116809OAI: oai:DiVA.org:umu-143944DiVA, id: diva2:1174264
Available from: 2018-01-15 Created: 2018-01-15 Last updated: 2018-06-09Bibliographically approved

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Sharifi, Tiva

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