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The effects of oxide supports on the low temperature hydrogenation activity of acetone over Pt/Ni bimetallic catalysts on SiO2, γ-Al2O3 and TiO2

Paper ID Volume ID Publish Year Pages File Format Full-Text
41740 45899 2011 6 PDF Available
Title
The effects of oxide supports on the low temperature hydrogenation activity of acetone over Pt/Ni bimetallic catalysts on SiO2, γ-Al2O3 and TiO2
Abstract

Low temperature (308 K) hydrogenation of acetone was used as a probe reaction to investigate the support effect on the hydrogenation activity of Pt/Ni bimetallic catalysts supported on TiO2, SiO2 and γ-Al2O3. The oxide supports significantly affected the catalytic properties of Pt/Ni catalysts, in which Pt/Ni/SiO2 bimetallic catalysts exhibited significantly higher activity than the other two bimetallic catalysts. TEM measurements revealed that the three supported Pt/Ni bimetallic catalysts have similar particle size distribution, while CO chemisorption measurements showed very different chemisorption capacity. Extended X-Ray absorption fine structure (EXAFS) measurements of the Pt LIII-edge indicated that Pt atoms were fully reduced and the Pt–Ni bimetallic bonds were formed on all three catalysts. The extent of Pt–Ni bond formation followed the trend of SiO2 > γ-Al2O3 > TiO2, which correlated very well with the hydrogenation activity.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (91 K)Download as PowerPoint slideResearch highlights▶ Oxide supports significantly affect the activity of Pt/Ni bimetallic catalysts. ▶ The hydrogenation activity on the support leads the trend of SiO2 > r-Al2O3 > TiO2.

Keywords
Support effect; Pt/Ni bimetallic catalysts; Hydrogenation; Acetone; EXAFS
First Page Preview
The effects of oxide supports on the low temperature hydrogenation activity of acetone over Pt/Ni bimetallic catalysts on SiO2, γ-Al2O3 and TiO2
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 393, Issues 1–2, 15 February 2011, Pages 44–49
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis