Preparation and adsorption properties of Pd nanoparticles supported on tio2 nanotubes

Andrei Honciuc, Mathias Laurin, Sergiu Albu, Max Amende, Marek Sobota, Robert Lynch, Patrik Schmuki, Joerg Libuda

Research output: Contribution to journalArticlepeer-review

Abstract

Here we present preparation methods for a series of novel model heterogeneous catalysts consisting of Pd nanoparticles dispersed on self-organized TiO2 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.

Original languageEnglish
Pages (from-to)20146-20154
Number of pages9
JournalJournal of Physical Chemistry C
Volume114
Issue number47
DOIs
Publication statusPublished - 2 Dec 2010
Externally publishedYes

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