催化剂表征和活性的一些方面

P. Wells
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引用次数: 12

摘要

回顾了催化剂结构和催化活性之间的联系,从涉及单相催化剂(氧化物和硫化物,金属单晶,沸石)和多相催化剂(特别是负载金属)的反应中选择了例子。考虑了表面科学、传统结构和表征研究、EXAFS光谱和催化剂原位评价方法对我们知识的贡献。有证据表明,在催化转化过程中,活性相中原子的可逆位移可能发生,正如永久保留的烃类物质在金属中建立可再生催化活性的重要性一样。在整个过程中,强调结构信息和机械研究的互补性和作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Some aspects of catalyst characterisation and activity
Knowledge of the connection between catalyst structure and catalytic activity is reviewed, examples being selected from reactions involving monophastic catalysts (oxides and sulphides, metal single crystals, zeolites) and multiphasic catalysts (especially supported metals). Contributions to our knowledge from surface science, conventional structure and characterisation studies, EXAFS spectroscopy, and in situ methods of catalyst evaluation are considered. Evidence that reversible displacements of atoms in the active phase may occur during catalytic conversions is noted, as is the importance of permanently retained hydrocarbonaceous species in the establishment of reproducible catalytic activity in metals. Throughout, the complementary nature and roles of structural information and mechanistic studies is emphasized.
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