Preparation and effect of Pt/CeZrO<sub>2</sub> diesel oxidation catalysts support

HUANG Haifeng; CHEN Xiao; GU Lei; XU Qinqi; ZHAN Linjun; LU Hanfeng

doi:10.11949/j.issn.0438-1157.20161535

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Preparation and effect of Pt/CeZrO₂ diesel oxidation catalysts support

更新时间：2025-12-10

- Preparation and effect of Pt/CeZrO₂ diesel oxidation catalysts support
- CIESC Journal Issue 4, Pages: 1390-1397(2017)
- 作者机构：
  
  1. 浙江工业大学环境学院,浙江,杭州,310014
  2. 浙江工业大学化学工程学院,浙江,杭州,310014
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161535
  CLC： 643.3X511
- Online First：05 April 2017，
  
  Published：05 April 2017
- 稿件说明：
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HUANG Haifeng, CHEN Xiao, GU Lei, et al. Preparation and effect of Pt/CeZrO₂ diesel oxidation catalysts support[J]. CIESC Journal, 2017, (4): 1390-1397. DOI: 10.11949/j.issn.0438-1157.20161535.
DOI：

HUANG Haifeng, CHEN Xiao, GU Lei, et al. Preparation and effect of Pt/CeZrO₂ diesel oxidation catalysts support[J]. CIESC Journal, 2017, (4): 1390-1397. DOI: 10.11949/j.issn.0438-1157.20161535. DOI：

摘要

分别用氢氧化钠（NaOH）、草酸（H2C2O4）和碳酸钠（Na2CO3）为沉淀剂制备CeZrO2固溶体，并以此为载体制备了Pt/CeZrO2柴油车DOC催化剂，通过XRD、BET、H2-TPR和催化氧化反应等手段对催化剂物理化学特性进行研究。结果发现，以NaOH作为沉淀剂制备的CeZrO2固溶体比表面积大（68.8 m2·g-1）、氧活动性强[表面氧耗氢量达1143 μmol·（g cat（-1]，同时贵金属Pt在其表面高度分散，因此制得的Pt/CeZrO2柴油车DOC催化剂催化效果好，特别是催化氧化碳氢化合物（C3H6），T90比H2C2O4和Na2CO3为沉淀剂制备的Pt/CeZrO2催化剂降低了将近40℃。另外载体制备方式对催化剂抗硫性影响也十分显著。故选择一种合适的载体沉淀剂可使制得的DOC催化剂具备良好的活性及抗硫性。

Abstract

CeZrO2 solid solutions were prepared by co-precipitation method through adopting different precipitators (NaOH

H2C2O4

Na2CO3)

and as the support

a series of Pt/CeZrO2 diesel oxidation catalysts was prepared. The physical and chemical properties were studied using the means of XRD

BET

H2-TPR and catalytic oxidation reaction. The results showed that the CeZrO2 solid solutions using NaOH as precipitant had the largest surface area(68.8 m2·g-1)

the most active oxygen[the H2 consumption of the surface oxygen is 1143 μmol·(g cat)-1] and the highest Pt dispersion on the surface

so the Pt/CeZrO2-NaOH exhibited excellent catalytic activity. In particular

catalytic oxidation hydrocarbons (C3H6)

the T90 decreased about 40℃ than the Pt/CeZrO2 catalyst prepared with H2C2O4 or Na2CO3. Besides

the preparation methods also influenced tolerance to sulfur of the catalysts. So selecting a suitable carrier precipitant could make the DOC catalyst has good activity and sulfur-resistance.

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Preparation and effect of Pt/CeZrO2 diesel oxidation catalysts support

DOI：10.11949/j.issn.0438-1157.20161535

摘要

Abstract

关键词

Keywords

references

Preparation and effect of Pt/CeZrO₂ diesel oxidation catalysts support