Surface Chemistry of Nano-Structured Mixed Metal Oxide Films
Abstract
We have synthesizes and studied nano-structured porous mixed metal oxide thin films with high surface area and catalytic activity. By temporally controlling the deposition of two different metals in low-pressure oxygen we synthesized mixed metal oxide catalytic films with spatially controlled compositions for physical characterization and surface chemical studies. Importantly, mixed metal oxides have desirable catalytic properties; they have been shown to enhance activity and selectivity, as well as reduce sintering. These materials are expected to have substantial surface areas with high concentrations of surface defects which can enhance adsorption and catalytic activity. We deposited the two metallic components in the oxide films in various time dependent ways to create both spatially homogeneous materials as well spatially heterogeneous materials. We were able to both tune the porous nature and structure of the material as well as the catalytic properties. Our basic research strategy involved: (i) physical characterization as a function of deposition conditions, (ii) study of the adsorption/absorption properties and surface defect concentrations, and (iii) investigation of the surface chemical and catalytic properties of the films, and finally (iv) we also investigated some of these materials as electrodes for the photo-oxidation of water and as anode materials for lithium ion batteries.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 11, 2012
- Accession Number
- ADA580034
Entities
People
- Charles B. Mullins
Organizations
- University of Texas at Austin