Pt/CeO2 coated with polyoxometallate chainmail to regulate oxidation of chlorobenzene without hazardous by-products

Jin Chen; Chunqi Wang; Xuelong Lv; Guixiang Huang; Wenjian Xu; Xiaolan Li; Hongpeng Jia

doi:10.1016/j.jhazmat.2022.129925

Pt/CeO₂ coated with polyoxometallate chainmail to regulate oxidation of chlorobenzene without hazardous by-products

J Hazard Mater. 2023 Jan 5:441:129925. doi: 10.1016/j.jhazmat.2022.129925. Epub 2022 Sep 7.

Authors

Jin Chen¹, Chunqi Wang², Xuelong Lv¹, Guixiang Huang³, Wenjian Xu⁴, Xiaolan Li⁴, Hongpeng Jia⁵

Affiliations

¹ CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Xiamen Key Laboratory of Materials for Gaseous Pollutant Control, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China.
² CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Xiamen Key Laboratory of Materials for Gaseous Pollutant Control, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
³ CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science & Technology of China, Hefei 230026, China.
⁴ CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Xiamen Key Laboratory of Materials for Gaseous Pollutant Control, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
⁵ CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Xiamen Key Laboratory of Materials for Gaseous Pollutant Control, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: hpjia@iue.ac.cn.

PMID: 36103768
DOI: 10.1016/j.jhazmat.2022.129925

Abstract

Doping noble metal and acid functionalization were both valid approaches to facilitate oxidation of chlorobenzene on CeO₂-based catalysts, but their promotion effects were influenced by different orders of modification process. Because of strong interaction between metal and support and proper redox nature of CeO₂, Pt NPs were re-dispersed into single atoms on CeO₂ surface via "ex-solution". Companied with Pt loading, the enhancement of oxidizing ability led to generation of polychlorinated by-products. Herein, CeO₂-supported Pt was coated by HSiW chainmail to protect Pt from being exposed to Cl-contained atmosphere, and HSiW coating promoted activation of chlorobenzene. The as-prepared chainmail catalyst of HSiW/Pt/CeO₂ displayed a remarkable performance in catalyzing oxidation of chlorobenzene without any dichlorobenzene at realistic condition. By comparison, other catalysts with exposed Pt suffered from production of toxic by-products.

Keywords: Acid functionalization; Catalytic oxidation; Chainmail catalyst; SIMS effect; Single atom.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Catalysis
Cerium*
Chlorobenzenes
Oxidation-Reduction

Substances

Chlorobenzenes
Cerium
chlorobenzene