Effect of supports over Pd/Fe2O3 on CO oxidation at low temperature

被引：32

作者：

Wang, Li ^{[1
]}

Pu, Chunhua ^{[1
]}

Xu, Lele ^{[1
]}

Cai, Yafeng ^{[1
]}

Guo, Yanglong ^{[1
]}

Guo, Yun ^{[1
]}

Lu, Guanzhong ^{[1
]}

机构：

[1] East China Univ Sci & Technol, Lab Res Inst Ind Catalysis, Key Lab Adv Mat, Shanghai 200237, Peoples R China

来源：

FUEL PROCESSING TECHNOLOGY | 2017年 / 160卷

基金：

中国国家自然科学基金;

关键词：

CO oxidation; Fe2O3; Low temperature; Deactivation; PREFERENTIAL OXIDATION; CARBON-MONOXIDE; XPS SPECTRA; CATALYSTS; PD; ADSORPTION;

D O I：

10.1016/j.fuproc.2017.02.037

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Pd/Fe2O3 catalysts were prepared by deposition-precipitation method and investigated for CO oxidation. Compared with Pd/alpha-Fe2O3, Pd/gamma-Fe2O3 exhibited the higher CO oxidation activity, and CO completely oxidation temperature was obtained at 0 degrees C. CO oxidation occurred through the dual sites mechanism, namely CO adsorbed on Pd species and O activation on the support. The close contact between Pd and gamma-Fe2O3 enhanced the redox recycle between Fe3+ and Fe2+ species, which played a decisive role in oxygen activation. The excellent performance in oxygen activation efficiently accelerated the rate-determining step in CO oxidation. The accumulated carbonate and hydrocarbonate species on alpha-Fe2O3 blocked the oxygen activation which resulted in the low activity of Pd/alpha-Fe2O3 in CO oxidation. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：152 / 157

页数：6

共 32 条

[1] AN INFRARED-SPECTROSCOPY STUDY OF THE ADSORPTION OF CO ON FE/MGO [J].