La改性Pt-Pd/CeZrO<italic style="font-style: italic"><sub>x</sub></italic>催化剂催化CO氧化性能及机理研究

鲍晓艳; 李博; 朱莹; 陶志平

doi:10.12434/j.issn.2097-2547.20250122

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La改性Pt-Pd/CeZrO_x催化剂催化CO氧化性能及机理研究

C1化学与催化转化 | 更新时间：2026-03-19

- La改性Pt-Pd/CeZrO_x催化剂催化CO氧化性能及机理研究
- Study on catalytic performances and mechanism of La-modified Pt-Pd/CeZrO_x catalysts for CO oxidation
- 低碳化学与化工 2026, 51(3): 32-40.
- 作者机构：
  
  中石化石油化工科学研究院有限公司，北京 100083
- 作者简介：
  
  鲍晓艳（1999—），硕士研究生，研究方向为应用化学，E-mail：baoxiaoyan.ripp@sinopec.com。
  陶志平（1966—），博士，正高级工程师，研究方向为燃料产品及添加剂研究，E-mail：taozp.ripp@sinopec.com。
- 基金信息：
  
  国家重点研发计划(2021YFB3500704)
- DOI：10.12434/j.issn.2097-2547.20250122
  中图分类号： TQ426.6
- 收稿：2025-03-19，
  
  修回：2025-04-20，
  
  纸质出版：2026-03-25
- 稿件说明：
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鲍晓艳,李博,朱莹等.La改性Pt-Pd/CeZrO_x催化剂催化CO氧化性能及机理研究[J].低碳化学与化工,2026,51(3):32-40.

BAO Xiaoyan,LI Bo,ZHU Ying,et al.Study on catalytic performances and mechanism of La-modified Pt-Pd/CeZrO_x catalysts for CO oxidation[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(3):32-40.
鲍晓艳,李博,朱莹等.La改性Pt-Pd/CeZrO_x催化剂催化CO氧化性能及机理研究[J].低碳化学与化工,2026,51(3):32-40. DOI： 10.12434/j.issn.2097-2547.20250122.

BAO Xiaoyan,LI Bo,ZHU Ying,et al.Study on catalytic performances and mechanism of La-modified Pt-Pd/CeZrO_x catalysts for CO oxidation[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(3):32-40. DOI： 10.12434/j.issn.2097-2547.20250122.

摘要

CO催化氧化技术是实现“碳中和”目标的关键技术之一。将La引入CeZrO

中，并采用浸渍法负载贵金属Pt和Pd，制备了Pt-Pd基双金属催化剂。通过XRD、XPS和H

-TPR等表征分析，探究了La改性对催化剂结构、表面元素价态、吸附性能和催化CO氧化机理的影响机制。结果表明，添加的La与CeZrO

形成了稳定的CeZrLaO

固溶体结构，增大了催化剂的比表面积和表面氧空位浓度。其中，Pt-Pd/CeZrLaO

-5%表现出良好的催化CO氧化性能，在温度为100~450 ℃、体积空速为150000 h

-1

条件下，CO转化率为50%和90%时的反应温度分别为165.7 ℃和222.0 ℃。in situ DRIFTS结果表明，在Pt-Pd/CeZrO

中，CO的线性吸附主要发生在Pd

位点，La增强了Pt

位点的吸附性能，并形成了Pt-Pd双活性位点的协同作用机制，进而促进了催化剂表面碳酸盐中间物种的快速转化，有助于提高催化剂催化CO氧化性能。

Abstract

CO catalytic oxidation technology is one of the key technologies for achieving “carbon neutrality” goal. La was introduced into CeZrO

and then noble metal Pt and Pd were loaded by impregnation method to prepare Pt-Pd based bimetallic catalysts. By characterization techniques such as XRD

XPS and H

-TPR

the effects of La modification on the structures

valence states of surface elements

adsorption properties and CO oxidation mechanism of the catalysts were explored. The results show that the La forms a stable CeZrLaO

solid solution structure with CeZrO

increasing the specific surface area and concentration of surface oxygen vacancy of the catalysts. Pt-Pd/CeZrLaO

-5% exhibits excellent catalytic performance for CO oxidation. Under the temperature from 100 ℃ to 450 ℃ and space velocity of 150000 h

-1

the reaction temperatures for CO conversion rates of 50% and 90% are 165.7 ℃ and 222.0 ℃

respectively. In situ DRIFTS results indicate that on the Pt-Pd/CeZrO

the linear adsorption of CO mainly takes place on Pd

sites. La enhances the adsorption capacity of Pt

sites to form a synergistic mechanism of Pt-Pd dual active sites

thereby promoting the rapid transformation of carbonate intermediates on the catalyst surface and improving the catalytic performances of the catalysts for CO oxidation.

关键词

Keywords

references

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La改性Pt-Pd/CeZrOx催化剂催化CO氧化性能及机理研究

Study on catalytic performances and mechanism of La-modified Pt-Pd/CeZrOx catalysts for CO oxidation

DOI：10.12434/j.issn.2097-2547.20250122

摘要

Abstract

关键词

Keywords

references

La改性Pt-Pd/CeZrO_x催化剂催化CO氧化性能及机理研究

Study on catalytic performances and mechanism of La-modified Pt-Pd/CeZrO_x catalysts for CO oxidation