Spatially resolved in situ FTIR analysis of CO adsorption and reaction on Pt/SiO2 in a silicon microreactor

被引：29

作者：

Tan, Chung Kwang Christopher ^{[1
,2
]}

Delgass, W. Nicholas ^{[1
]}

Baertsch, Chelsey D. ^{[1
,2
]}

机构：

[1] Purdue Univ, Sch Chem Engn, W Lafayette, IN 47907 USA

[2] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2009年 / 93卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

Focal plane array; MEMS; Microreactor; In situ spectroscopy; Spatial resolution; CO oxidation; SURFACE ELEMENTARY STEPS; LIGHT-OFF TESTS; NOX STORAGE; PT/AL2O3; CATALYST; INFRARED-SPECTROSCOPY; PARALLEL ANALYSIS; HIGH-THROUGHPUT; TRANSIENT FTIR; KINETIC-MODEL; OXIDATION;

D O I：

10.1016/j.apcatb.2009.09.013

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：

The design, fabrication and testing of a microreactor-FTIR imaging system is shown and used for the first time to demonstrate the ability to obtain in situ transmission FTIR analysis of working catalysts with both spatial and temporal resolution. MEMS (MicroElectroMechanical Systems) and microfabrication technologies were used to design and fabricate a microreactor with geometric and optical properties ideal for coupling with a high-throughput transmission FPA-FTIR system. CO adsorption and oxidation on Pt/SiO2 were used as a model catalyst system. Propagation of adsorbed species down the length of the microreactor was observed and fractional coverages were quantified during pulsed chemisorption experiments. The amount of adsorbed CO was also differentiated at different positions in the microreactor as a function of time during oxidation of the stored surface species. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：66 / 74

页数：9

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