化学
催化作用
数码产品
纳米技术
有机化学
物理化学
材料科学
出处
期刊:Advances in Catalysis
日期:1979-01-01
卷期号:: 1-22
被引量:81
标识
DOI:10.1016/s0360-0564(08)60052-8
摘要
Publisher Summary This chapter describes the experimental results that support the concept that, in certain reactions of the redox type, the interaction between catalysts and supports and its effect on catalytic activity are determined by the electronic properties of metals and semiconductors, taking into account the electronic effects in the boundary layer. In particular, it has been shown that electronic effects on the activity of the catalysts, as expressed by changes of activation energies, are much larger for inverse mixed catalysts than for the more conventional and widely used “normal” mixed catalysts. The effects are in the order of a few electron volts with inverse systems as opposed to a few tenths of an electron volt with normal systems. The difference is readily understandable in terms of the different magnitude of, and impacts on electron concentrations in metals versus semiconductors. It is hoped that these facts and concepts are amenable to practical applications in the planned synthesis of active catalysts for certain suitable reactions. Implementation of such a systematic approach to catalyst design will require that the character of the reaction and the work functions of catalysts and supports are known or determined.
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