SnO2 Promoted by Praseodymia: Novel Catalysts for CO Oxidation

被引:8
|
作者
Zhang, Rongbin [1 ]
Shang, Jinyan [1 ]
Zeng, Xianrong [1 ]
Xu, Xianglan [1 ]
Fang, Xiuzhong [1 ]
Wang, Xiang [1 ]
机构
[1] Nanchang Univ, Dept Chem, Nanchang 330031, Jiangxi, Peoples R China
关键词
CO Oxidation; Rutile SnO2; Praseodymia; Sn-Pr Binary Catalysts; Pr2Sn2O7; THERMALLY STABLE CATALYSTS; MIXED OXIDES; CH4; TEMPERATURE; REDUCTION; TIN; COMBUSTION; ETHANOL; ALUMINA; METHANE;
D O I
10.1524/zpch.2012.0180
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
Praseodymia-doped SnO2 catalysts were prepared with precipitation-deposition method and used for CO oxidation. The samples were characterized by means of Inductive Coupled Plasma Emission Spectrometery (ICP), N-2 Adsortion-desorption with Brunauer-Emmett-Teller Technique (N-2-BET), X-ray Podwer Diffraction (XRD), H-2 Temperature Programmed Reduction (H-2-TPR), Thermal Gravity Analysis-Differential Scanning Carorimetry (TGA-DSC) and X-ray Photoelectron Spectroscopy Analysis (XPS). Praseodymia was found to disperse finely onto the surface of rutile SnO2, and had some strong interaction with it, thus stabilizing the surface area of the resulted catalysts as well as producing larger amount of active oxygen species. As a consequence, the CO oxidation activity of the Sn-Pr composite metal oxide catalysts was significantly enhanced. The activity of the catalysts also improves with the increasing of praseodymia addition amount, mainly due to the formation of more active oxygen species and increased surface areas.
引用
收藏
页码:275 / 290
页数:16
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