| EPSRC Reference: |
GR/R94978/01 |
| Title: |
Determination by vibrational spectroscopy of the absorption sites of hydrogen on supported metal catalysts |
| Principal Investigator: |
Parker, Dr SF |
| Other Investigators: |
|
| Researcher Co-Investigators: |
|
| Project Partners: |
|
| Department: |
ISIS Pulsed Neutron & Muon Source |
| Organisation: |
STFC Laboratories (Grouped) |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
31 March 2003 |
Ends: |
30 May 2006 |
Value (£): |
69,643
|
| EPSRC Research Topic Classifications: |
| Catalysis & Applied Catalysis |
Chemical Structure |
|
| EPSRC Industrial Sector Classifications: |
| Chemicals |
No relevance to Underpinning Sectors |
|
| Related Grants: |
|
| Panel History: |
|
|
Summary on Grant Application Form |
|
SummaryDescribe the proposed research in about 200 words.Hydrogen is a key reactant in many industrial processes. However, the adsorption sites occupied by hydrogen on supported metal catalysts are poorly characterised. This is important because there is evidence that the different sites have different reactivities. Proton NMR can detect the presence of hydrogen but can only indirectly distinguish between on-top and multiply-bonded hydrogen. Vibrational spectroscopy is sensitive to the local environment so potentially offers a solution to the problem. However, infrared and Raman spectroscopies have proven unable to deliver on this promise because of problems of spectral black-out by the support (except for the on-top species) and insensitivity and/or sample fluorescence respectively. Vibrational inelastic neutron scattering (INS) spectroscopy does not suffer from these problems and is particularly suited to detection of the low energy modes of multply-bonded hydrogen species. Very recent preliminary results show that this is feasible. It is proposed to exploit the complementarity of in-situ infrared spectroscopy and INS spectroscopy to characterise the high and low frequency modes respectively. Determination of the type of each site will be made by a combination of selective desorption and site poisoning. INS spectroscopy is intrinsically quantitative so it should be possible to determine the relative proportions of the different sites directly from the INS spectra. This proposal is particularly timely because the best INS spectrometer in the world
|
|
Key Findings |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Potential use in non-academic contexts |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Impacts |
|
| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
|
| Date Materialised |
|
|
|
|
Sectors submitted by the Researcher |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
| Project URL: |
|
| Further Information: |
|
| Organisation Website: |
|