文献类型：期刊文献

英文题名：Enhancing effect of dual-atom catalysts on tetrabromobisphenol S degradation via peroxydisulfate activation: Synergism of Fe-Cu and electron-transfer mechanism

作者：Wang, Qi[1];Zhou, Dongmei[2];Liu, Cun[3];Chen, Xiurong[1];Liu, Lili[1];Lin, Kuangfei[1]

机构：[1]East China Univ Sci & Technol, Sch Resource & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Peoples R China;[3]Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, 71 East Beijing Rd, Nanjing 210008, Peoples R China

年份：2023

卷号：460

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20231213778088);WOS:【SCI-EXPANDED(收录号:WOS:000946608500001)】；

基金：This work was financially supported by The National Key Research and Development Program of China (2019YFC1803701, 2018YFC1800705, and 2018YFC1803304) . The authors would like to thank Nannan Han from Shiyanjia Lab ( www.shiyanjia.com ) for the XPS analysis.

语种：英文

外文关键词：Dual -atom catalyst; Peroxydisulfate; Electron -transfer mechanism; Density function theory; Fe-Cu synergism

摘要：Increasing the metal atom loading on single-atom catalysts may not improve their activation performance on peroxydisulfate (PDS). In this study, dual-atom catalysts (Fe0.4Cu0.6-N-C) were synthesized using a one-pot method: Fe and Cu atoms were uniformly dispersed as dual Fe-Cu atom pairs in a nitrogen-doped graphitic carbon support. Fe0.4Cu0.6-N-C exhibited an excellent degradation efficiency (98.7 %) and rate (0.060 min-1) for tetrabromobisphenol S (TBBPS, 5 mg/L) within 60 min of treatment under optimized conditions. In-situ Raman spectroscopy, electrochemical analyses, and electron paramagnetic resonance tests revealed that elec-tron transfer was the main degradation pathway for TBBPS. Density functional theory calculations demonstrated that the synergism between Fe and Cu atoms enhanced the adsorption of PDS and the dual Fe-Cu sites served as the active centers during PDS activation. Additionally, the TBBPS degradation pathways were investigated, and most of the TBBPS intermediates were considered innocuous. These findings give weight to the enhanced effect of the synergism of dual Fe-Cu sites on PDS activation, providing an innovative system for pollutant degradation through electron-transfer pathways.