Spectral reconstruction of surface adsorbed species using band-target entropy minimization.: Application to CO and NO reaction over a Pt/γ-Al2O3 catalyst using in situ DRIFT spectroscopy
Spectral reconstruction of surface adsorbed species using band-target entropy minimization.: Application to CO and NO reaction over a Pt/γ-Al2O3 catalyst using in situ DRIFT spectroscopy
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DOI：
10.1039/b714544f
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发表时间：
2008-01-01
影响因子：
3.3
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中科院分区：
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采用原位漫反射红外傅里叶变换光谱（DRIFTS）研究了氧化铝负载铂催化剂对NO和CO的吸附。温度范围为50-160摄氏度，使用的分压变化很大。将带目标熵最小化（BTEM）算法应用于DRIFTS数据集，得到吸附在Pt（主要是各种Pt-0-CO和Pt2+-CO物质）和氧化铝表面（即硝酸盐、亚硝酸盐、碳酸氢盐、异氰酸盐）和气相物质上的许多物质的纯组分光谱。鉴定了31个已知的物种，以及6个新的和以前未报道或以前未分配的光谱。结果表明，对DRIFTS数据进行BTEM分析是研究多相催化原位光谱数据的一种很有前途的工具。
The adsorption of NO and CO was studied on an alumina-supported platinum catalyst by in situ diffuse reflectance infrared Fourier-transform spectroscopy ( DRIFTS). The temperature range was 50-160 degrees C and a wide variety of partial pressures was used. The band-target entropy minimization (BTEM) algorithm was applied to the DRIFTS data sets resulting in the pure component spectra of numerous species adsorbed on both the Pt ( primarily a variety of Pt-0-CO and Pt2+-CO species) and alumina surface (i. e. nitrates, nitrites, bicarbonates, isocyanates) as well as gas-phase species. Thirty-one previously known species were identified as well as 6 new and previously unreported or previously unassigned spectra. The present results indicate that BTEM analysis of DRIFTS data is a very promising tool for the study of heterogeneous catalytic in situ spectroscopic data.