双功能
催化作用
氧化剂
化学
双金属片
过氧化氢
碳纤维
铁质
无机化学
活性炭
多相催化
双功能催化剂
复合数
材料科学
有机化学
吸附
复合材料
作者
Yuanyuan Yao,Yuqi Pan,Yanxi Yu,Zixun Yu,Leo Lai,Fangzhou Liu,Li Wei,Yuan Chen
标识
DOI:10.1007/s10311-022-01453-6
摘要
Abstract Fenton processes allow to degrade and mineralize toxic organic contaminants, yet classical Fenton processes require continuously adding hydrogen peroxide and ferrous ions, costly solution pH adjustment, and treatment of secondary iron sludge pollution. Heterogeneous electro-Fenton processes deliver oxidizing radicals with only oxygen and electricity consumed. Bifunctional catalysts allow the synthesis and activation of hydrogen peroxide simultaneously, eliminate additional chemical reagents, and yield no metal residues in treated water. Here, we review bifunctional catalysts for heterogeneous electro-Fenton processes. We describe the mechanisms of oxidizing radical generation from oxygen. Then, we compare different types of bifunctional catalysts based on their elemental compositions: (1) metal/carbon composite catalysts, i.e., monometallic iron/carbon composite catalysts, bimetallic/trimetallic carbon composite catalysts, and transition metal single-atom catalysts; (2) metal composite catalysts without carbon; and (3) metal-free carbon catalysts. Then, we present five other approaches beyond electrocatalysts, which have been used to improve the performance of heterogeneous electro-Fenton processes.
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