期刊
PLATINUM METALS REVIEW
卷 55, 期 4, 页码 233-245出版社
JOHNSON MATTHEY PUBL LTD CO
DOI: 10.1595/147106711X598910
关键词
-
资金
- International Platinum Group Metals Association
- Royal Society, London, UK
The species present in a variety of fresh and road aged light-duty diesel catalysts were determined by platinum L(3) edge X-ray absorption spectroscopy (XAS). It was found that it is not sufficient to use the analysis of X-ray absorption near edge structure (XANES) alone to determine the nature of species present in fresh and road aged catalysts. Detailed analysis of the extended X-ray absorption fine structure (EXAFS) revealed the presence of a mixture of oxidic and metallic species in the fresh catalysts. Metallic components were predominantly found in the road aged catalysts. The present study did not find any chloroplatinate species in the systems investigated.
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