Study on the Effects of Metal Doping on the Activity and Selectivity of Pt/MFI Catalysts for Vinyl Chloride Catalytic Oxidation

XU Fuwen; SONG Yuchun; WANG Li; GUO Yun

doi:10.11949/0438-1157.20260549

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Study on the Effects of Metal Doping on the Activity and Selectivity of Pt/MFI Catalysts for Vinyl Chloride Catalytic Oxidation

更新时间：2026-07-06

- Study on the Effects of Metal Doping on the Activity and Selectivity of Pt/MFI Catalysts for Vinyl Chloride Catalytic Oxidation
- CIESC Journal (2026)
- 作者机构：
  
  华东理工大学化学与分子工程学院，上海200237
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20260549
  CLC： TQ032.4;TQ426.8
- Received：16 April 2026，
  
  Revised：2026-07-05，
  
  Accepted：06 July 2026，
- 稿件说明：
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XU Fuwen, SONG Yuchun, WANG Li, et al. Study on the Effects of Metal Doping on the Activity and Selectivity of Pt/MFI Catalysts for Vinyl Chloride Catalytic Oxidation[J/OL]. CIESC Journal, 2026.
DOI：

XU Fuwen, SONG Yuchun, WANG Li, et al. Study on the Effects of Metal Doping on the Activity and Selectivity of Pt/MFI Catalysts for Vinyl Chloride Catalytic Oxidation[J/OL]. CIESC Journal, 2026. DOI： 10.11949/0438-1157.20260549.

摘要

氯乙烯（VC）广泛存在于氯碱工业废气中，其排放危害人类健康和自然环境。金属掺杂沸石骨架可以有效调控催化剂的氧化还原性能和酸碱性，进而影响催化反应性能。本文探讨了金属Al、Ga掺杂对于贵金属Pt负载的纯硅沸石催化剂（Pt/Si-MFI）催化氧化氯乙烯性能的影响，并结合多种表征手段探究了掺杂对于反应影响的机制。金属掺杂一方面增加了催化剂表面酸性、促进了氯乙烯的吸附和活化；另外一方面增加了催化剂表面活性氧物种数量和活性，促进了氯乙烯的进一步氧化；但较多的活性氧物种在高温下也会通过Deacon反应促进Cl

的生成，导致氯代副产物的形成。该工作揭示了影响氯乙烯氧化活性和氯代副产物选择性的关键因素，为高效催化剂的设计提供了理论支持。

Abstract

Vinyl chloride (VC)

which is widely present in waste gas from the chlor-alkali industry

is hazardous to human health and the natural environment. Metal doping into the zeolite framework can effectively modulate catalytic performance by regulating the redox properties and surface acidity/basicity of catalysts. Therefore

the effects of Al and Ga doping on the catalytic performance of Pt-supported pure-silica zeolite catalyst (Pt/Si-MFI) for VC oxidation were investigated

and a series of characterization techniques were employed to elucidate the mechanism of metal doping on the reaction. On one hand

metal doping enhances the surface acidity of the catalysts

promoting the adsorption and activation of VC; on the other hand

it increases the amount and reactivity of surface active oxygen species

facilitating the further oxidation of VC. However

excessive active oxygen species at elevated temperatures also favor the formation of Cl

via the Deacon reaction

thus promoting t

he generation of chlorinated by-products. This work reveals the key factors governing the activity of VC and the selectivity of chlorinated by-products

providing theoretical support for the design of high-efficiency catalysts.

关键词

Keywords

references

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