负载型氧化钼单层催化剂的拉曼光谱研究

IF 9.3 2区 化学 Q1 CHEMISTRY, PHYSICAL
G. Mestl, T. K. Srinivasan
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引用次数: 319

摘要

VIb族金属的氧化物(Cr、Mo、W)和钒、铼、铌的氧化物(如Al2O3、TiO2、sio2、ZrO2等)被认为是工业上重要的催化剂或各种反应的催化剂前驱体[1-11],这些材料经常被描述为所谓的单层催化剂,其结构模型假设活性氧化物在支撑表面上扩散。为了阐明催化剂表面物质的性质,并研究活性金属中心的配位环境,研究人员采用了多种技术,包括传统的批量取样技术以及表面敏感电子和离子光谱技术对催化剂进行了研究。电子光谱产生宽频带,光谱比振动光谱信息量少。此外,虽然俄歇电子能谱(AES)和x射线光电子能谱(XPS)等技术…
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Raman Spectroscopy of Monolayer-Type Catalysts: Supported Molybdenum Oxides
Abstract Oxides of the group VIb metals (Cr, Mo, W) and oxides of vanadium, rhenium, and niobium supported on a second high-surface-area metal oxide such as Al2O3, TiO2, Si02, ZrO2, and so forth are recognized as industrially important catalysts or catalyst precursors for various reactions [1–11], These materials frequently have been described as so-called monolayer catalysts based on a structural model which assumed spreading of the active oxide over the support surface. These catalysts have been investigated by a variety of techniques, conventional bulk sampling techniques as well as by surface-sensitive electron and ion spectroscopies, in an attempt to elucidate the nature of the catalyst surface species, and to study the coordination environment of the active metal center(s). Electronic spectroscopy gives rise to broad bands and the spectra are less informative than vibrational spectra. In addition, although techniques such as Auger electron spectroscopy (AES) and x-ray photoelectron spectroscopy (XPS...
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来源期刊
CiteScore
22.30
自引率
2.80%
发文量
29
期刊介绍: Catalysis Reviews is dedicated to fostering interdisciplinary perspectives in catalytic science and engineering, catering to a global audience of industrial and academic researchers. This journal serves as a bridge between the realms of heterogeneous, homogeneous, and bio-catalysis, providing a crucial and critical evaluation of the current state of catalytic science and engineering. Published topics encompass advances in technology and theory, engineering and chemical aspects of catalytic reactions, reactor design, computer models, analytical tools, and statistical evaluations.
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