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Visualization of oxygen storage process in Pd/CeO2-ZrO2 three-way catalyst based on isotope quenching technique

Tsuyoshi Nagasawa, Atsushi Kobayashi,Susumu Sato,Hidenori Kosaka,Kyeounghak Kim,Hyo Min You,Katsunori Hanamura, Ami Terada, Takao Mishima

Chemical Engineering Journal（2023）

Cited 5|Views12
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Abstract
•Oxygen isotope labeling and reaction quenching technique is applied to model TWC.•Oxygen storage process in model TWC is visualized with 100-nm-scale resolution.•Presence of Pd enhances surface 18O concentration and diffusion depth into CZ bulk.•Favored oxygen vacancy formation on CZ near the Pd cluster is supported by DFT.•Oxygen release/storage simulation provides reasonable local kinetic parameters.
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Key words
Three-way catalyst,Oxygen storage capacity,Visualization,Oxygen isotope labeling,SIMS
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