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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Thermoelectricity Enhanced Electrocatalysis

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Autor(es):
Sharifi, Tiva [1, 2] ; Zhang, Xiang [1] ; Costin, Gelu [3] ; Yazdi, Sadegh [1] ; Woellner, Cristiano F. [1, 4] ; Liu, Yang [1] ; Tiwary, Chandra Sekhar [1] ; Ajayan, Pulickel [1]
Número total de Autores: 8
Afiliação do(s) autor(es):
[1] Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 - USA
[2] Umea Univ, Dept Phys, SE-90187 Umea - Sweden
[3] Rice Univ, Dept Earth Sci, Houston, TX 77005 - USA
[4] Univ Estadual Campinas, Appl Phys Dept, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: Nano Letters; v. 17, n. 12, p. 7908-7913, DEC 2017.
Citações Web of Science: 3
Resumo

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 nano-structured 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 similar to 50 mA/cm(2) is produced at zero potential for Bi0.5Sb1.5Te3 in the presence of a temperature gradient of 90 degrees 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. (AU)

Processo FAPESP: 16/12340-9 - Propriedades estruturais e mecânicas de espumas baseadas no carbono
Beneficiário:Cristiano Francisco Woellner
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
Processo FAPESP: 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais
Beneficiário:Munir Salomao Skaf
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs