Contact-Electro-Catalysis Through Electret Behavior to Facilitate Electron Transfer

作者：Xinnan Li, Wangshu Tong, Jing Shi, Xinyue Zhang, Yunfan Chen, X Liu, Yihe Zhang · 发表于：ACS Applied Materials & Interfaces · 年份：2024 · DOI：10.1021/acsami.4c09206 · 被引用次数：17 · 研究领域：Electrocatalysts for Energy Conversion、Fuel Cells and Related Materials、Molecular Junctions and Nanostructures

Contact-electro-catalysis (CEC) usually uses polymer dielectrics as its catalysts under mechanical stimulation conditions, which although has a decent catalytic dye degradation effect still warrants performance improvement. A carrier separation promotion strategy based on an internal electric field by polarization can effectively improve ferroelectric material performance in photocatalysis and piezocatalysis. Therefore, carrier separation as a necessary process of CEC also can be promoted and is largely expected to improve CEC performance theoretically. However, the carrier separation enhancement by the internal electric field strategy has not been achieved in the CEC experiment yet, because of the difficulty of building an internal electric field in an inert polymer dielectric. Herein, a polytetrafluoroethylene (PTFE) dielectric was charged through an electret process, which was believed to establish an internal electric field for CEC catalysts proved by KPFM, XPS, and triboelectric nanogenerator voltage output analysis. The fastest degradation rate of methyl orange reached over 90% at 1.5 h, while the hydroxyl free radical (•OH) yield of the PTFE electret was nearly three times that of the original PTFE. Density functional theory (DFT) calculations verified that the potential barrier of interatomic electron transfer between PTFE and H 2 O was reduced by 37% under the internal electric field. The electret strategy used herein to optimize the PTFE catalyst provides a base for...