In:
Catalysis Science & Technology, Royal Society of Chemistry (RSC), Vol. 11, No. 18 ( 2021), p. 6182-6190
Abstract:
The dynamic behavior of Pd species and the CeO 2 support of 1 wt% Pd/Al 2 O 3 and Pd/CeO 2 catalysts during three-way catalysis was examined in real time with operando multi-probe analysis using a micro gas chromatograph, a NO x meter, and a quadrupole mass spectrometer and time-resolved quick X-ray absorption spectroscopy (XAS) measurements. With additional ex situ NO pulse measurement, the results demonstrated the effect of oxygen storage materials under ideal automobile exhaust conditions, which can be summarized into a well-known anchoring effect of CeO 2 on active metal species, an oxygen storage/release effect to maintain near stoichiometric conditions on the catalyst surface, NO reduction ability of CeO 2 itself, and storage/release of carbonaceous species on/from CeO 2 .
Type of Medium:
Online Resource
ISSN:
2044-4753
,
2044-4761
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2021
detail.hit.zdb_id:
2595090-3
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