期刊
TOPICS IN CATALYSIS
卷 54, 期 16-18, 页码 1070-1078出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11244-011-9727-5
关键词
X-ray absorption spectroscopy; Modulation excitation spectroscopy; Pd; Pt; NO reduction; CO oxidation
资金
- Empa
- Umicore
- Swiss National Science Foundation (SNF)
The advantages and open questions of the combination of modulation excitation spectroscopy and phase sensitive detection (PSD) with X-ray absorption spectroscopy (XAS) for the analysis of heterogeneous catalysts at work are reviewed. The characteristic spectral signatures of two different edges (Pd K and Pt L-3) are described in relation to the red-ox chemistry of Pd/Al2O3 and Pt/Al2O3 with respect to NO reduction by CO and CO oxidation, respectively. Both examples demonstrate that PSD makes XAS sensitive to potentially active species for the catalytic reaction.
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