1. Hard x-ray photoemission spectroscopic investigation of palladium catalysts immobilized on a GaAs(001) surface.
- Author
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Shimoda, M., Konishi, T., Tateishi, K., Toujyou, T., Tsukamoto, S., Nishiwaki, N., Arisawa, M., Hoshiya, N., Shuto, S., Isomura, N., Yokota, H., Furukawa, Y., Iizuka, K., Ogiwara, T., Isozaki, Y., Yamashita, Y., Yoshikawa, H., Ueda, S., and Kobayashi, K.
- Subjects
PALLADIUM ,GALLIUM arsenide ,PHOTOEMISSION ,PHOTOELECTRON spectroscopy ,SURFACE chemistry - Abstract
We present studies on the structure and chemical states of a catalyst developed by immobilizing palladium on S-terminated GaAs(001). Hard x-ray photoelectron spectroscopy (HX-PES) of core-level and valence band photoemission consistently indicates that the organopalladium molecules are reduced on the surface yielding Pd nanoparticles with a metallic nature. This finding is supported by high-resolution observations using scanning electron microscopy and backscattered electron image. HX-PES results also reveal that a portion of S atoms forming the S-termination is oxidized during the formation of Pd nanoparticles. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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