Electroactive and sustainable Cu-MoF/PEDOT composite electrocatalysts for multiple redox mediators and for high-performance dye-sensitized solar cells

Ai Nin Yang, Jiann T. Lin, Chun Ting Li*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

3 引文 斯高帕斯(Scopus)

摘要

An electrically conductive Cu-MOF, {[Cu2(6mercaptonicotinic acid)(6-mercaptonicotinate)]·NH4}n, was successfully electrodeposited on the conductive substrates via using poly(3,4-ethylenedioxythiophene) (PEDOT) as the binder. Multiple functionalities of the Cu-MOF microparticle within the Cu-MOF/PEDOT composite electrode were systematically vindicated as (1) releasing the cohesive strength among the PEDOT matrix, thus enhancing the film adhesion to substrate, (2) providing excellent intrinsic heterogeneous rate constant via lowering the reaction active energy, (3) supplying numerous active sites at the center or edges on its (−Cu−S−)n honeycomb-like planes, (4) facilitating the electron transfer through its two-dimensional (−Cu−S−)n plains, and (5) benefiting the penetration of the redox mediators through its porous frameworks. In multiple redox mediators (i.e., I/I3, cobalt(II/III)-complex, and copper(I/II)complex), the composite Cu-MOF/PEDOT electrode exhibited superior electrocatalyst activity and kept almost 100% of its initial redox peak currents after continuous cyclic voltammetric scanning for 300 cycles. As a high-performance electrocatalyst for the counter electrode in dye-sensitized solar cells (DSSCs), the composite Cu-MOF/PEDOT electrode rendered its cell a decent solar-to-electricity conversion efficiency of up to 9.45% at 1 sun and 22.80% at room light illumination. Compared to the traditional platinum electrode (7.67%), the low-cost Cu-MOF/PEDOT composite electrode has great possibility to be used for various electrochemical devices and the Internet-of-things applications.

原文英語
頁(從 - 到)8435-8444
頁數10
期刊ACS Applied Materials and Interfaces
13
發行號7
DOIs
出版狀態已發佈 - 2021 二月 24

ASJC Scopus subject areas

  • 材料科學(全部)

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