Morphology dependent regulation of oxygen vacancies in CeO<sub>2</sub> and its catalytic performance for toluene oxidation

MA Xiaofei; FENG Fan; FAN Hongxia; LI Wenying

doi:10.11949/0438-1157.20260602

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Morphology dependent regulation of oxygen vacancies in CeO₂ and its catalytic performance for toluene oxidation

更新时间：2026-08-14

- Morphology dependent regulation of oxygen vacancies in CeO₂ and its catalytic performance for toluene oxidation
- CIESC Journal (2026)
- 作者机构：
  
  1.太原理工大学省部共建煤基能源清洁高效利用国家重点实验室，山西太原 030024
  2.太原理工大学化学与化工学院，山西太原030024
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20260602
  CLC： TQ 13;X 511
- Received：29 April 2026，
  
  Revised：2026-08-12，
  
  Accepted：14 August 2026，
- 稿件说明：
移动端阅览
MA Xiaofei, FENG Fan, FAN Hongxia, et al. Morphology dependent regulation of oxygen vacancies in CeO₂ and its catalytic performance for toluene oxidation[J/OL]. CIESC Journal, 2026. DOI: 10.11949/0438-1157.20260602.
DOI：

MA Xiaofei, FENG Fan, FAN Hongxia, et al. Morphology dependent regulation of oxygen vacancies in CeO₂ and its catalytic performance for toluene oxidation[J/OL]. CIESC Journal, 2026. DOI: 10.11949/0438-1157.20260602. DOI：

摘要

可凝结颗粒物气态有机前体的高效脱除是当前环境催化领域的研究重点。本研究以甲苯为目标污染物，采用水热合成法，可控制备三种具有特定暴露晶面的CeO

催化剂，探究其在甲苯催化氧化中的晶面效应及影响机制。性能测试结果表明，主要暴露（110）和（100）晶面的CeO

纳米棒具有优异的催化活性与稳定性，225 °C时即可实现甲苯90%的转化，其表观活化能（71.6 kJ·mol

–1

）及比反应速率均优于暴露（100）晶面的纳米立方体和暴露（111）晶面的纳米多面体。催化剂构效关系分析表明，暴露晶面的精准调控有效调节了催化剂表面氧空位的浓度，其中，CeO

纳米棒中高能晶面的暴露有利于产生更丰富的氧空位，不仅有利于活性氧物种的迁移与高活性表面吸附氧的形成，还可加速Ce

/Ce

的氧化还原循环，进而提升甲苯氧化活性。

Abstract

Efficient elimination of gaseous organic precursor

s of condensable particulate matter is a major research focus in environmental catalysis. Herein

using toluene as a model pollutant

CeO

catalysts with distinct exposed crystal facets were controllably synthesized via a hydrothermal method. This work systematically investigates the facet-dependent performance in the catalytic oxidation of toluene. Catalytic performance tests show that CeO

nanorods predominantly enclosed by the (110) and (100) facets exhibit outstanding catalytic activity and stability

achieving 90% toluene conversion at a relatively low temperature of 225 °C. Notably

CeO

nanorods exhibit a lower apparent activation energy (71.6 kJ·mol

–1

) and higher specific reaction rates than the (100)-faceted nanocubes and (111)-faceted nanopolyhedra. The structure-activity relationship analysis indicates that precise control of the exposed crystal facets effectively regulates the concentration of surface oxygen vacancies. The exposure of high-energy facets on the CeO

nanorods generates more abundant oxygen vacancies

which not only facilitates the migration of reactive oxygen species and the formation of highly active surface adsorbed oxygen

but also accelerates the redox cycle of Ce

/Ce

thereby enhancing the toluene oxidation activity.

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⁰

Morphology dependent regulation of oxygen vacancies in CeO2 and its catalytic performance for toluene oxidation

DOI：10.11949/0438-1157.20260602

摘要

Abstract

关键词

Keywords

references

Morphology dependent regulation of oxygen vacancies in CeO₂ and its catalytic performance for toluene oxidation