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Type: Artigo
Title: Thermoelectricity enhanced electrocatalysis
Author: Sharifi, T.
Zhang, X.
Costin, G.
Yazdi, S.
Woellner, C. F.
Liu, Y.
Tiwary, C. S.
Ajayan, P.
Abstract: 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.
Subject: Termoeletricidade
Gradiente de temperatura
Temperature gradient
Country: Estados Unidos
Editor: American Chemical Society
Rights: fechado
Identifier DOI: 10.1021/acs.nanolett.7b04244
Date Issue: 2017
Appears in Collections:IFGW - Artigos e Outros Documentos

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