| EPSRC Reference: |
GR/S61676/01 |
| Title: |
Oxygen excess K2NiF4 oxides for harsh environment carbon monoxide (CO) sensing |
| Principal Investigator: |
Kilner, Professor JA |
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| Project Partners: |
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| Department: |
Materials |
| Organisation: |
Imperial College London |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 November 2003 |
Ends: |
31 October 2004 |
Value (£): |
57,711
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
Materials Synthesis & Growth |
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Summary on Grant Application Form |
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This proposal involves the development of novel oxygen excess K2NiF4 type oxides as possible candidates for harsh environment carbon monoxide (CO) sensing. Earlier studies at Imperial College London suggested that oxides having the n=1 Ruddlesden-Popper structure, K2NiF4, can incorporate significant amounts of excess oxygen into the rock salt layers as interstitial defects. Hence an ideal usage of these phases will be in sensing reducing gases such as CO which prefers preferential adsorption on to 02- or 0-, according to the surface layer sensing mechanism. The majority of conventional oxides available for CO sensing are restricted to operation at temperatures less than 450 oC due to thermal and structural limitations. However the oxygen excess K2NiF4 type phases in the proposed investigations are stable up to at least 1100 oC and with suitable substitutions on the Wand 'B' sites the excess oxygen content can be controlled thus allowing variation of the surface charge density and therefore preferential adsorption of reducing gases onto the surface. This proposal involves the synthesis and characterization of novel oxygen excess A2BO4+d oxides, measurement of their electrical properties, testing and fabrication as a CO sensor as a feasibility.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.imperial.ac.uk |