Preparation and characterization of MCM-41 supported Pt-Al catalysts

CHEN Xiuying; XIE Huilin; HU Wenbin; ZHOU Xinhua; ZHOU Hongjun; SHU Xugang

doi:10.11949/j.issn.0438-1157.20180789

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Preparation and characterization of MCM-41 supported Pt-Al catalysts

更新时间：2025-12-10

- Preparation and characterization of MCM-41 supported Pt-Al catalysts
- CIESC Journal Issue S1, Pages: 72-79(2018)
- 作者机构：
  
  仲恺农业工程学院化学化工学院, 广州市农用化学品高效利用重点实验室,广东,广州,510225
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180789
  CLC： Q426.82
- Online First：30 September 2018，
  
  Published：30 September 2018
- 稿件说明：
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CHEN Xiuying, XIE Huilin, HU Wenbin, et al. Preparation and characterization of MCM-41 supported Pt-Al catalysts[J]. CIESC Journal, 2018, (S1): 72-79.
DOI：

CHEN Xiuying, XIE Huilin, HU Wenbin, et al. Preparation and characterization of MCM-41 supported Pt-Al catalysts[J]. CIESC Journal, 2018, (S1): 72-79. DOI： 10.11949/j.issn.0438-1157.20180789.

摘要

以介孔硅MCM-41为载体、无水乙醇为溶剂、氯化铝为促进剂，采用浸渍法制备了Pt-Al/MCM-41催化剂。利用XRD、XPS、TEM、FTIR、N2吸附-脱附、NH3-TPD对催化剂进行了表征，重点讨论了不同Pt-Al负载顺序对催化剂结构和性能的影响，并将其应用于硅氢加成反应。结果表明，Pt和Al的负载顺序不同会影响催化剂的有序度、Pt颗粒的分散程度和酸性，其中，Pt-Al/MCM-41催化剂的有序度和Pt颗粒的分散程度相对最好，酸性相对较强。在七甲基三硅氧烷与烯丙醇聚氧乙烯醚的硅氢加成反应中，不同催化剂对七甲基三硅氧烷的转化率影响顺序为Pt-Al/MCM-41 > Pt+Al/MCM-41 > Al-Pt/MCM-41 > Pt/MCM-41。

Abstract

The Pt-Al/MCM-41 catalysts were prepared by impregnation method

using mesoporous silica MCM-41 as carrier

anhydrous alcohol as dissolvent and AlCl3 as accelerator. The catalysts were systematically characterized by X-ray diffraction assay

X-ray photoelectron spectroscopy

transmission electron microscopy

Fourier transform infrared spectroscopy

N2 adsorption-desorption and automatic chemical adsorption analyzer. The effects of different Pt-Al interaction sequences on the structure and performance of the catalysts were emphatically discussed

and the catalytic application in hydrosilylation was investigated. The results showed that different Pt-Al interaction sequences had an effect on degree of order and acidity of the catalysts and the dispersion of platinum particle

among them

the Pt-Al/MCM-41 catalyst has the relatively best degree of order

acidity and platinum dispersion. The order of influence of different catalysts on the conversion with reaction time in the hydrosilylation of heptamethyltrisiloxane and allyl polyether is Pt-Al/MCM-41 > Pt+Al/MCM-41 > Al-Pt/MCM-41 > Pt/MCM-41.

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