Formation and Stabilization of Nano-Sized Pt Clusters on TiO2 Surfaces
This paper reports experiments related to the stability and size distributions of platinum (Pt) clusters on TiO2 surfaces. Efforts to enhance the efficiency and reliability of microsystems will likely use components or elements with at least one dimension smaller than a micron. The ability to design and fabricate elements at submicron dimensions-nanotechnology-is a rapidly growing area of science and technology. In this paper we describe experiments using newly generated knowledge of surfaces and the nanodimensional information provided by scanning probe microscopy (SPM) that are designed to assist development of a new generation of catalysts for application in microchemical systems. Critical questions for the design of a new catalyst is the ability to fabricate metal clusters of different sizes and their temperature stability. We report on the investigation of nucleation, growth, and temperature stability of self-organized nanoscale Pt clusters on different TiO2 surfaces using scanning tunneling microscopy (STM) and x-ray photoelectron spectroscopy (XPS). Surfaces examined include anatase (001) and rutile (110), both (1x1) and reconstructed (1x2) forms.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 15010073
- Report Number(s):
- PNNL-SA-32693-A
- Resource Relation:
- Conference: IMRET 4: 4th International Conference on Microreaction Technology, Topical Conference Proceedings, AIChE Spring National Meeting, March 5-9, 2000. Atlanta, GA., 121-126; American Institute of Chemical Engineers,New York,,UNITED STATES.
- Country of Publication:
- United States
- Language:
- English
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