| Texto completo | |
| 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: | 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais |
| Beneficiário: | Munir Salomao Skaf |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 16/12340-9 - Propriedades Estruturais e Mecânicas de Espumas Baseadas no Carbono |
| Beneficiário: | Cristiano Francisco Woellner |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |