FT-IR study of the surface redox states on platinum-potassium-alumina catalysts

被引：31
作者：
Montanari, Tania [1 ]
Matarrese, Roberto [2 ,3 ]
Artioli, Nancy [2 ,3 ]
Busca, Guido [1 ]
机构：
[1] Univ Genoa, Dipartimento Ingn Chim & Proc, Lab Chim Superfici & Catalisi Ind, I-16129 Genoa, Italy
[2] Politecn Milan, Lab Catalysis & Catalyt Proc, Dipartimento Energia, I-20133 Milan, Italy
[3] Politecn Milan, Ctr Excellence, NEMAS, I-20133 Milan, Italy
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2011年 / 105卷 / 1-2期
关键词：
Platinum; Nanoparticles; IR spectroscopy; Adsorbed CO; Supported Pt catalysts; Potassium alumina; NOx adsorption and reduction; Catalytic combustion; RAY PHOTOELECTRON-SPECTROSCOPY; OXIDE SURFACES; NOX STORAGE; CO; ADSORPTION; OXIDATION; CHEMISORPTION; METHANE; NANOPARTICLES; COMBUSTION;
D O I：
10.1016/j.apcatb.2011.03.021
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：
Pt-K/Al2O3 (Pt 1%; K 5.4% wt/wt) catalyst active for the simultaneous Diesel particulate oxidation and NOx reduction have been characterized in comparison with 1% Pt/Al2O3 catalyst. IR spectra of adsorbed CO at 140 degrees C and at room temperature allowed the detection of oxidized Pt centers and of their very strong oxidizing ability. TPD and IR spectra of adsorbed CO2 allowed to characterize the basicity of the samples. The data indicate that Pt centers lie in close proximity of potassium oxide species generating basicity. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：15 / 23
页数：9
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