| AVS 56th International Symposium & Exhibition | |
| In Situ Microscopy and Spectroscopy: Interfacial and Nanoscale Science Topical Conference | Thursday Sessions |
| Session IS+SS-ThM |
| Session: | In-Situ Spectroscopy - Interfacial Science & Catalysis |
| Presenter: | F. Borondics, Lawrence Berkeley National Laboratory |
| Authors: | F. Borondics, Lawrence Berkeley National Laboratory P. Jiang, Lawrence Berkeley National Laboratory S. Porsgaard, Lawrence Berkeley National Laboratory & iNANO University of Aarhus, Denmark M. Köber, Lawrence Berkeley National Laboratory A. Caballero, Lawrence Berkeley National Laboratory H. Bluhm, Lawrence Berkeley National Laboratory M. Salmeron, Lawrence Berkeley National Laboratory |
| Correspondent: | Click to Email |
In this study we focus on the interaction of oxygen with Au that has been proposed to play an important role in the mechanism of oxidation reactions. Using in situ high-pressure X-ray photoelectron spectroscopy (HP-XPS) and in situ scanning electron microscopy we studied the different model systems, such as bulk gold, evaporated sub-monolayer and different size nanoparticle samples using single crystalline TiO2 (110) as substrate.
Our results show that gold oxidation can be induced under certain conditions, such as high intensity X-rays or reactive ozone atmosphere. The existence of gold oxide has been mentioned in the literature, but our systematic studies provide a better understanding of the formation and stability of this compound, which is not only a chemical curiosity being the oxide of the noblest metal, but can be very important in designing more efficient catalysts. In addition, we would like to draw the attention of the community to a number of artifacts that can easily lead to misinterpretation of experimental data.
The implications of our results should be considered in the field of catalysis, nano- and surface science as well as in situ high-energy spectroscopies.