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首页> 外文期刊>Physical review >Particle-size dependent heats of adsorption of CO on supported Pd nanoparticles as measured with a single-crystal microcalorimeter
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Particle-size dependent heats of adsorption of CO on supported Pd nanoparticles as measured with a single-crystal microcalorimeter

机译:用单晶微热量计测量,CO吸附在负载的Pd纳米颗粒上的粒度取决于热

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摘要

We present calorimetric measurements of the effect of cluster size on the adsorption enthalpy of carbon monoxide on Pd nanoclusters sized from 120 to 4900 Pd atoms per particle, which were grown in situ on a well-ordered Fe_3O_4/Pt(111) film. A substantial decrease in the initial heat of adsorption amounting to about 20-40 kJ mol~(-1) was observed on the smallest Pd nanoparticles as compared to the larger Pd clusters and the extended Pd(111) single-crystal surface. We discuss this effect in terms of the size-dependent properties of the Pd nanoparticles.
机译:我们用量热法测量簇大小对一氧化碳在Pd纳米簇上的吸附焓的影响,该簇的尺寸为每个粒子120至4900 Pd原子,这些簇原位生长在有序的Fe_3O_4 / Pt(111)薄膜上。与较大的Pd团簇和扩展的Pd(111)单晶表面相比,在最小的Pd纳米颗粒上观察到的吸附初始热量显着降低,约为20-40 kJ mol〜(-1)。我们根据Pd纳米粒子的尺寸依赖性来讨论这种效应。

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