Crystal phase effects on the structure and performance of ruthenium nanoparticles for CO2 hydrogenation

Qingquan Lin; Xiao Yan Liu; Ying Jiang; Yong Wang; Yanqiang Huang; Tao Zhang

doi:10.1039/C4CY00030G

Crystal phase effects on the structure and performance of ruthenium nanoparticles for CO₂ hydrogenation†

Qingquan Lin,^abc Xiao Yan Liu,^a Ying Jiang,^d Yong Wang,^d Yanqiang Huang*^a and Tao Zhang^a

* Corresponding authors

^a State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences (CAS), Dalian 116023, China
E-mail: yqhuang@dicp.ac.cn
Fax: + 86 411 84685940

^b State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China

^c Graduate University of Chinese Academy of Sciences, Beijing 10049, China

^d Center of Electron Microscopy and State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

Abstract

The effect of TiO₂ phase structure on the dispersion of Ru nanoparticles was investigated in this study. Rutile-type TiO₂ (r-TiO₂) appears to be a superior support to prohibit the aggregation of RuO₂ during calcination in air. Compared with anatase-type TiO₂ (a-TiO₂) supported Ru nanoparticles (4.0 ± 2.4 nm), r-TiO₂ supported ones exhibited a narrower particle size distribution (1.1 ± 0.2 nm). This unique property was attributed to a strong interaction between RuO₂ and r-TiO₂ in terms of the formation of the Ru–O–Ti bond, which was confirmed by X-ray absorption measurements and H₂-TPR experiments. This strong interaction not only promotes to a great extent the highly efficient dispersion of Ru nanoparticles, but also prevents their aggregation. As a result, the Ru/r-TiO₂ catalysts displayed a much higher activity and thermal stability than the Ru/a-TiO₂ in the reaction of CO₂ methanation.

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Article information

DOI: https://doi.org/10.1039/C4CY00030G
Article type: Paper
Submitted: 10 Jan 2014
Accepted: 08 Mar 2014
First published: 12 Mar 2014

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Catal. Sci. Technol., 2014,4, 2058-2063

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Crystal phase effects on the structure and performance of ruthenium nanoparticles for CO₂ hydrogenation

Q. Lin, X. Y. Liu, Y. Jiang, Y. Wang, Y. Huang and T. Zhang, Catal. Sci. Technol., 2014, 4, 2058 DOI: 10.1039/C4CY00030G

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