Accession Number:

ADA604470

Title:

High Throughput Spectroscopic Catalyst Screening via Surface Plasmon Spectroscopy

Descriptive Note:

Final rept. 7 Mar 2013-6 Mar 2014

Corporate Author:

MELBOURNE UNIV PARKVILLE (AUSTRALIA)

Personal Author(s):

Report Date:

2014-05-10

Pagination or Media Count:

17.0

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 coreshell 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 AuTiO2Pt, AuZnOPt, AuSiO2Pt 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 N2H2 mixtures, but does dissociate in airH2 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.

Subject Categories:

  • Chemistry
  • Crystallography
  • Atomic and Molecular Physics and Spectroscopy
  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE