High Throughput Spectroscopic Catalyst Screening via Surface Plasmon Spectroscopy
Abstract
The overall goal of this research was to utilize rapid surface plasmon spectroscopy to develop a new platform to correlate catalytic performance and behavior with catalyst morphology (e.g., size, shape) of individual core/shell nanoparticles. Kinetic experiments were performed on dihydrogen adsorption, but the findings are expected to be generally relevant to other surface-critical heterogeneous chemistries. Comparative studies of Au/TiO2/Pt, Au/ZnO/Pt, Au/SiO2/Pt were done to evaluate the spectroscopic methodology. It was found that substrate choice was critical to hydrogen adsorption and that hydrogen does not dissociate on gold nanoparticles on TiO2 in N2:H2 mixtures, but does dissociate in air:H2 mixtures. In the presence of Pt, dissociation occurs on Pt, and in the presence of a semiconducting matrix H2 spillover occurs with electrons able to migrate to the gold particles. High-throughput combinatorial screening was used to create catalyst libraries by fabricating nanoarrays (20nm features) of individual nanocrystals using Capillary Force Assembly. Active research is focused on studying electron transfer during catalysis to show that this methodology can distinguish between different individual catalysts in the array at the single nanocrystal level.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 10, 2014
- Accession Number
- ADA604470
Entities
People
- Paul Mulvaney
Organizations
- University of Melbourne