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oa Analysis of the Outer Surface of Platinum-Gold Catalysts by Low-Energy Ion Scattering
Improved resolution allows selective analysis of mixed metal systems
- Source: Platinum Metals Review, Volume 54, Issue 2, Apr 2010, p. 81 - 87
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- 01 Jan 2010
Abstract
Low-energy ion scattering (LEIS) can be used to selectively analyse the atomic composition of the outer atomic layer of a catalyst, i.e., precisely the atoms that largely determine its activity and selectivity. It is shown how a new development in LEIS significantly improves its mass resolution. Using this advanced separation and quantification of signals from platinum and gold, the atomic composition of the outer surface of a realistic supported platinum-gold bimetallic system can be determined for the first time.
© Johnson Matthey