Highly dispersed Pt delta+ on TixCe(1-x)O2 as an active phase in preferential oxidation of CO

作者：Rico Frances S; Jardim E O; Wezendonk T A; Kapteijn F; Gascon J; Sepulveda Escribano A; Ramos Fernandez Enrique V^*

来源：Applied Catalysis B: Environmental , 2016, 180: 169-178.

DOI：10.1016/j.apcatb.2015.06.031

• PROX
• Ceria
• Titania
• Platinum
• Hydrogen purification

Structure-activity relationships for 1 wt.% Pt catalysts were investigated for a series of TixCe(1-x)O2 (x = 1, 0.98,0.9,0.5,0.2 and 0) supports prepared by the sol-gel method. The catalysts prepared by impregnation were characterized in detail by applying a wide range of techniques as N-2-isotherms, XRF, XRD, Raman, XPS, H-2-TPR, Drifts, UV-vis, etc. and tested in the preferential oxidation of CO in the presence of Hy. Also several reaction conditions were deeply analyzed. A strong correlation between catalyst performance and the electronic properties let us to propose, based in all the experimental results, a plausible reaction mechanism where several redox cycles are involved.

• 出版日期2016-1