Enhanced CeO2-supported Pt catalyst for water-gas shift reaction

被引：28

作者：

Hwang, Kyung-ran ^{[1
]}

Ihm, Son-ki ^{[2
]}

Park, Jong-soo ^{[1
]}

机构：

[1] Korea Inst Energy Res, Taejon 305343, South Korea

[2] Korea Adv Inst Sci & Technol, Taejon 305701, South Korea

来源：

FUEL PROCESSING TECHNOLOGY | 2010年 / 91卷 / 07期

关键词：

Water-gas shift; Sodium; Ceria preparation; Precipitation; Surface formate; TRANSFORM INFRARED-SPECTROSCOPY; SELECTIVE CO OXIDATION; PT/CEO2; CATALYSTS; ROOM-TEMPERATURE; PRECIOUS METALS; CARBON-MONOXIDE; CERIA; OXIDE; CEO2; ADSORPTION;

D O I：

10.1016/j.fuproc.2010.02.004

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Sodium-promoted, CeO2-supported, Pt catalyst were synthesized and investigated for water-gas shift (WGS) reaction. The ceria supports were synthesized by conventional precipitation method. The effect of the basic aqueous solutions used in the preparation procedure on the nature of Pt/CeO2 catalyst was examined by physical and chemical characterization analyses. The catalytic activity for the WGS reaction was observed. In the Pt/CeO2 catalyst prepared by NaOH, the presence of sodium (1.64 wt.%) on the support modified the base and electronic properties and consequently enhanced the catalytic activity of Pt/CeO2. Based on temperature-programmed desorption (TPD). X-ray photoelectron spectroscopy (XPS) and diffuse reflectance infrared spectroscopy (DRIFTS) analyses, we concluded that sodium introduced through the ceria preparation procedure played an important role in the WGS reaction as a promoter to induce the fast build-up of surface intermediates of the WGS reaction and also as an electron donor to modify the adsorption strength between CO and Pt. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：729 / 736

页数：8

共 34 条

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