Reaction Kinetics, Mechanisms and Catalysis
Volume/Issue:
Volume 106: Issue 2
Characterizations of Ir/TiO2 catalysts with different Ir contents for selective hydrogenation of crotonaldehyde
Authors:
Ping Chen Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China

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Jiqing Lu Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China

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Guanqun Xie Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China

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Lin Zhu Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China

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Mengfei Luo Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China

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Pages:
419–434
Online Publication Date:
18 Mar 2012
Publication Date:
01 Aug 2012
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s11144-012-0435-3
Keywords:
Iridium; Supported catalyst; Crotonaldehyde; Selective hydrogenation; Crotyl alcohol
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Abstract

Vapor-phase selective hydrogenation of crotonaldehyde was carried out over Ir/TiO2 catalysts with different Ir contents prepared by an impregnation method. The catalysts were characterized by X-ray powder diffraction (XRD), temperature-programmed reduction (TPR), diffuse reflectance infrared Fourier transform spectra of CO adsorption (CO-DRIFTS), NH3 temperature-programmed desorption (NH3-TPD), Raman spectroscopy and temperature-programmed oxidation (TPO). It was found that with increasing Ir content in Ir/TiO2, both the activity (TOF) and selectivity to crotyl alcohol first increased and then slightly decreased. The 3 % Ir/TiO2 catalyst showed the highest activity, (with a TOF of 9.3 × 10−3 s−1) and the highest selectivity to crotyl alcohol (74.6 %) in the hydrogenation of crotonaldehyde. The results of CO-DRIFTS indicated that the reduced catalyst contains a mixture of Ir0 and Irδ+. It was concluded that the catalytic performance of the catalysts depended on the strength of surface acidity and the Ir particles size for the selective hydrogenation of crotonaldehyde to crotyl alcohol.

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Cover Reaction Kinetics, Mechanisms and Catalysis
Reaction Kinetics, Mechanisms and Catalysis
Print ISSN:
1878-5190
Online ISSN:
1878-5204

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Reaction Kinetics, Mechanisms and Catalysis
Language English
Size B5
Year of
Foundation		 1974
Volumes
per Year		 1
Issues
per Year		 6
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1878-5190 (Print)
ISSN 1878-5204 (Online)

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