Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 140, Issue 1, Pages 176-184Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b07114
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, as part of the program Elements Strategy Initiative to Form Core Research Center
- Grants-in-Aid for Scientific Research [17KT0007] Funding Source: KAKEN
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The dynamic behavior of Rh species in 1 wt% Rh/Al2O3 catalyst during the three-way catalytic reaction was examined using a micro gas chromatograph, a NOx meter, a quadrupole mass spectrometer, and time-resolved quick X-ray absorption spectroscopy (XAS) measurements at a public beamline for XAS, BL01B1 at SPring-8, operando. The combined data suggest different surface rearrangement behavior, random reduction processes, and autocatalytic oxidation processes of Rh species when the gas is switched from a reductive to an oxidative atmosphere and vice versa. This study demonstrates an implementation of a powerful operando XAS system for heterogeneous catalytic reactions and its importance for understanding the dynamic behavior of active metal species of catalysts.
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