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 suraces and the nanodimentional information provided by scanning prbe 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 surgaces 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.
Revised: November 10, 2005 |
Published: September 30, 2000
Citation
Baer D.R., Y. Liang, and S. Gan. 2000.Formation and Stabilization of Nano-Sized Pt Clusters on TiO2 Surfaces. In IMRET 4: 4th International Conference on Microreaction Technology, Topical Conference Proceedings, AIChE Spring National Meeting, March 5-9, 2000. Atlanta, GA., 121-126. New York, New York:American Institute of Chemical Engineers. PNNL-SA-32693-A.