3,4-亚乙基二氧基取代的导电聚合物对 2,5-二巯基-1,3,5-噻二唑的电催化作用。

Electrocatalysis of 2,5-dimercapto-1,3,5-thiadiazole by 3,4-ethylenedioxy-substituted conducting polymers.

机构信息

Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States.

出版信息

Langmuir. 2011 Nov 15;27(22):13904-9. doi: 10.1021/la202706s. Epub 2011 Oct 14.

DOI:10.1021/la202706s

PMID:21955097

Abstract

The electronic properties of electropolymerized films of the 3,4-ethylenedioxy-substituted conducting polymers (CP) poly(3,4-ethylenedioxythiophene) (PEDOT), poly(3,4-ethylenedioxypyrrole) (PEDOP) and poly(3,4-ethylenedioxyselenophene) (PEDOS) have been investigated, along with their electrocatalytic activity toward 2,5-dimercapto-1,3,4-thiadiazole (DMcT). For the electropolymerized films, the conductivity onset potential was most negative for PEDOP (-1.50 V), followed by PEDOS (-1.35 V) and with PEDOT possessing the most positive onset (-1.15 V). The heterogeneous charge transfer rate constant for DMcT in solution at polymer-film-modified glassy carbon electrodes (GCEs) was studied. It was found that compared to PEDOP, both PEDOS and PEDOT performed better as electrocatalysts, with PEDOS having a heterogeneous charge transfer rate constant of 1.8 × 10(-3) cm/s. The film morphology of the electropolymerized films was investigated via SEM, and some film characteristics could be correlated with electrocatalytic activity. The potential use of CP/DMcT composites for lithium ion batteries (LIBs) is discussed.

摘要

已研究了 3,4-亚乙基二氧基取代的导电聚合物（CP）聚（3,4-亚乙基二氧噻吩）（PEDOT）、聚（3,4-亚乙基二氧吡咯）（PEDOP）和聚（3,4-亚乙基二氧硒吩）（PEDOS）的电聚合膜的电子特性及其对 2,5-二巯基-1,3,4-噻二唑（DMcT）的电催化活性。对于电聚合膜，PEDOP 的电导率起始电位最负（-1.50 V），其次是 PEDOS（-1.35 V），而 PEDOT 的起始电位最正（-1.15 V）。研究了在聚合物膜修饰的玻碳电极（GCE）上的溶液中 DMcT 的非均相电荷转移速率常数。结果发现，与 PEDOP 相比，PEDOS 和 PEDOT 作为电催化剂的性能更好，其中 PEDOS 的非均相电荷转移速率常数为 1.8×10(-3) cm/s。通过 SEM 研究了电聚合膜的形态，一些膜特性可以与电催化活性相关联。还讨论了 CP/DMcT 复合材料在锂离子电池（LIBs）中的潜在用途。