Comparative study of CO adsorption on zirconia polymorphs with DRIFT and transmission FT-IR spectroscopy

被引：24

作者：

Zhou, Wei ^{[1
]}

Ma, Zhongyi ^{[2
]}

Guo, Shupeng ^{[2
]}

Wang, Min ^{[2
]}

Wang, Jungang ^{[2
]}

Xia, Ming ^{[2
]}

Jia, Litao ^{[2
]}

Hou, Bo ^{[2
]}

Li, Debao ^{[2
]}

Zhao, Yongxiang ^{[1
]}

机构：

[1] Shanxi Univ, Coll Chem & Chem Engn, Taiyuan 030006, Shanxi, Peoples R China

[2] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2018年 / 427卷

关键词：

Zirconia polymorphs; CO adsorption; DRIFT; Transmission FT-IR spectroscopy; IN-SITU FTIR; SURFACE CHARACTERIZATION; METHANOL SYNTHESIS; CARBON-DIOXIDE; SYNTHESIS GAS; METAL-OXIDES; ACID SITES; ZRO2; IDENTIFICATION; HYDROGEN;

D O I：

10.1016/j.apsusc.2017.08.113

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The interactions of CO with amorphous, monoclinic, and tetragonal zirconia were investigated by diffuse reflectance infrared (DRIFT) and transmission FT-IR spectroscopy to determine the active sites for CO adsorption. The results showed that zirconia polymorphs exerted a great influence on CO bands and the formation of surface intermediates. Meanwhile, differences of CO bands and surface intermediates were observed between DRIFT and transmission FT-IR spectra. Two ways were proposed to produce active sites for CO adsorption, one way was thermal dehydroxylation in vacuum and the other was CO reaction with hydroxyls at high temperature. The former was the main way to produce active sites for CO adsorption in transmission FT-IR spectra, and the latter was the main way to produce active sites for CO adsorption in DRIFT spectra. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：867 / 873

页数：7

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