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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Preparation and Adsorption Properties of Pd Nanoparticles Supported on TiO2 Nanotubes
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Preparation and Adsorption Properties of Pd Nanoparticles Supported on TiO2 Nanotubes

机译：TiO2纳米管上负载的Pd纳米颗粒的制备及吸附性能

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摘要

Here we present preparation methods for a series of novel model heterogeneous catalysts consisting of Pd nanoparticles dispersed on self-organized T1O2 nanotube arrays (TiNTs). For a comprehensive comparative study of TiNTs' surface adsorption properties, different chemical and physical methods were employed for the deposition of the Pd nanoparticles: (i) e-beam deposition in high vacuum (HV) and (ii) in ultrahigh vacuum (UHV), (iii) impregnation, and (iv) metal precipitation. Following preparation, the Pd/TiNTs were exposed to several O2 (oxidative) and CO (reductive) cleaning cycles at 500 K in UHV. After each cleaning cycle, the CO adsorption properties were systematically probed with time-resolved infrared reflection-adsorption spectroscopy to monitor the surface state of the catalyst. It is shown that clean and well-defined Pd/TiNT catalysts can be obtained, which are well suited for future adsorption and reactivity studies.
机译：在这里，我们介绍了一系列由分散在自组织TiO 2纳米管阵列（TiNTs）上的Pd纳米颗粒组成的新型异相催化剂的制备方法。为了对TiNTs的表面吸附特性进行全面的比较研究，采用了不同的化学和物理方法沉积Pd纳米颗粒：（i）高真空（HV）中的电子束沉积和（ii）超高真空（UHV）中的电子束沉积，（iii）浸渍和（iv）金属沉淀。制备后，将Pd / TiNTs在UHV中以500 K暴露于数个O2（氧化）和CO（还原）清洁循环中。在每个清洁循环之后，用时间分辨红外反射-吸收光谱系统地探测CO的吸附性能，以监测催化剂的表面状态。结果表明，可以得到清洁且定义明确的Pd / TiNT催化剂，非常适合将来的吸附和反应性研究。

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