Catalytic behavior of supported Ru nanoparticles on the (101) and (001) facets of anatase TiO2

被引：59

作者：

Wang, Fei ^{[1
]}

Zhang, Shitong ^{[1
]}

Li, Changming ^{[1
]}

Liu, Jie ^{[1
]}

He, Shan ^{[1
]}

Zhao, Yufei ^{[1
]}

Yan, Hong ^{[1
]}

Wei, Min ^{[1
]}

Evans, David G. ^{[1
]}

Duan, Xue ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

来源：

RSC ADVANCES | 2014年 / 4卷 / 21期

基金：

中国国家自然科学基金;

关键词：

SELECTIVE METHANATION; NANOSCALE CERIA; CO OXIDATION; PHASE; GAS; PERFORMANCE; ADSORPTION; NANOSHEETS; INTERFACE; PT/AL2O3;

D O I：

10.1039/c3ra47076h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ru/TiO2 heterogeneous catalysts were prepared by immobilizing Ru nanoparticles onto the (101) and (001) facets of anatase TiO2 substrate, and the influence of metal-support interactions on the catalytic behavior of Ru/TiO2 towards CO2 methanation was studied from the viewpoint of electronic structure. Structural investigations based on temperature-programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS) indicate that a stronger metal-support interaction occurs between Ru and (101) facet in contrast to the Ru and (001) one. This gives rise to an enhancement in CO2 adsorption as well as spill-over hydrogen at the interface of Ru/TiO2(101), accounting for its largely enhanced catalytic activity towards CO2 methanation. In addition, a theoretical study based on density functional theory (DFT) calculations reveals that the Ru nanoparticles supported on the (101) plane have a relatively lower activation energy for CO dissociation (the rate-determining step), which results in their high activity toward CO2 methanation reaction.

引用

页码：10834 / 10840

页数：7

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