Department of Chemistry and Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Tsinghua University , Beijing 100084, China.
ACS Appl Mater Interfaces. 2014 Mar 12;6(5):3587-93. doi: 10.1021/am405771y. Epub 2014 Feb 4.
Composites of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and reduced graphene oxide (rGO) have been prepared by solution mixing and applied as electrocatalysts for oxygen reduction reaction (ORR) after treatment with concentrated H2SO4. The blending of rGO induces the conformational change of PEDOT chains from benzoid to quionoid structure and charge transfer from rGO to PEDOT. H2SO4 post-treatment can remove part of insulating PSS from the surface of the PEDOT:PSS/rGO composite film, resulting in a significant conductivity enhancement of the composite. This synergistic effect makes the H2SO4-treated PEDOT:PSS/rGO composite a promising catalyst for ORR. It exhibits enhanced electrocatalytic activity, better tolerance to a methanol crossover effect and CO poisoning, and longer durability than those of the platinum/carbon catalyst.
聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）和还原氧化石墨烯（rGO）的复合材料通过溶液混合制备，并在经过浓硫酸处理后用作氧还原反应（ORR）的电催化剂。rGO 的掺入诱导 PEDOT 链从苯并型到醌型结构的构象变化，并从 rGO 到 PEDOT 的电荷转移。H2SO4 后处理可以从 PEDOT：PSS/rGO 复合膜的表面去除部分绝缘 PSS，从而显著提高复合材料的电导率。这种协同效应使得 H2SO4 处理的 PEDOT：PSS/rGO 复合材料成为一种有前途的 ORR 催化剂。它表现出增强的电催化活性，对甲醇交叉效应和 CO 中毒的更好耐受性，以及比铂/碳催化剂更长的耐久性。
