Low-temperature CO oxidation over water tolerant Pt catalyst supported on Al-modified CeO2

• Published in: The Korean journal of chemical engineering Vol. 30; no. 3; pp. 598 - 604
• Main Authors: Park, Jung-Hyun, Cho, Jun Hee, Kang, Sung Eun, Cho, Kyung Ho, Lee, Tae Woo, Han, Hyun Sik, Shin, Chae-Ho
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.03.2013; 한국화학공학회
• Subjects: Biotechnology; Catalysis; Chemistry; Chemistry and Materials Science; Industrial Chemistry/Chemical Engineering; Materials Science; Reaction Engineering; 화학공학; Al MAS NMR; Platinum; Al modified CeO; CO Oxidation; CO-TPR
• ISSN: 0256-1115; 1975-7220
• DOI: 10.1007/s11814-012-0207-9

A series of xAl-(1-x)Ce oxides (x=0-0.20) were prepared as supports by the coprecipitation method. 1 wt% Pt was impregnated on the Al-modified Ce oxide supports, which were tested as catalysts for CO oxidation in the absence and presence of H 2 O vapor. The prepared catalysts were characterized by X-ray diffraction (XRD), N 2 sorption, CO temperature-programmed reduction (CO-TPR), 27 Al magic-angle spinning (MAS) NMR, and CO-chemisorption analyses. Upon comparison of the catalytic results obtained from the 1 wt% Pt/xAl-(1-x)Ce oxide catalysts, the Pt/0.10Al-0.90Ce oxide catalyst was found to exhibit the highest catalytic activity. When water vapor was present in the feed stream, the catalytic activity increased remarkably, and T 90% shifted to a temperature ca. 30 °C lower compared to that in dry conditions due to the promotion effect by the water-gas shift reaction. The catalytic activity could be correlated with the Pt dispersion and the amount of surface or lattice oxygen.