催化作用
过氧化氢
溶解
降级(电信)
化学
氧气
活性氧
化学工程
甲基橙
激进的
光化学
无机化学
有机化学
光催化
生物化学
计算机科学
工程类
电信
作者
Weixin Li,J.P. Tu,Jikai Sun,Yuanbao Zhang,Jiale Fang,Mingda Wang,Xiangyu Liu,Zhong‐Qun Tian,Feng Ru Fan
标识
DOI:10.1002/anie.202413246
摘要
Contact Electro-Catalysis (CEC) using commercial dielectric materials in contact-separation cycles with water triggers interfacial electron transfer, generating reactive oxygen species (ROS). However, the hydrophobicity of these materials limits reaction sites, and the generated ROS often combine to form hydrogen peroxide (H2O2), which does not decompose further, leading to suboptimal rates. Addressing H2O2 generation and activation is crucial for advancing CEC. Here, we synthesized a catalyst by loading polytetrafluoroethylene (PTFE) onto ZSM-5 (PZ), achieving uniform dispersion in water. Introducing an FeIII-initiated self-cycling Fenton system (SF-CEC), with synergistic O2 activation and FeIII-activated H2O2, enhanced ROS generation. This system enabled nearly 99% degradation of azo dyes within 10 minutes, a sixfold improvement over traditional CEC. It represents the fastest ultrasound-induced degradation rate of methyl orange dye to date. Without extra oxidants, it also achieved stable dissolution of precious metals in weakly acidic solutions at room temperature, with 80% gold dissolution within 2 hours-2.5 times faster than similar systems. This study corrects the perception of CEC under acidic conditions, offering new insights for dye degradation and precious metal recovery.
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