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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Thermoelectricity Enhanced Electrocatalysis

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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]
Total Authors: 8
[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
Total Affiliations: 4
Document type: Journal article
Source: Nano Letters; v. 17, n. 12, p. 7908-7913, DEC 2017.
Web of Science Citations: 3

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)

FAPESP's process: 13/08293-7 - CCES - Center for Computational Engineering and Sciences
Grantee:Munir Salomao Skaf
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 16/12340-9 - Structural and mechanical properties of carbon-based foams
Grantee:Cristiano Francisco Woellner
Support type: Scholarships abroad - Research Internship - Post-doctor