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Pd/CeO 2− x Nanorod Catalysts for CO Oxidation: Insights into the Origin of Their Regenerative Ability at Room Temperature
Author(s) -
Zhou Yunyun,
Lawrence Neil J.,
Wu TaiSing,
Liu Jing,
Kent Patrick,
Soo YunLiang,
Cheung Chin Li
Publication year - 2014
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201402243
Subject(s) - catalysis , nanorod , palladium , carbon monoxide , inorganic chemistry , materials science , chemistry , oxide , chemical engineering , nanotechnology , metallurgy , organic chemistry , engineering
The decrease in the activity of a catalyst after use is a persistent challenge in the chemical industry. We report that palladium‐decorated ceria (Pd/CeO 2− x , in which 0≤ x <0.5) nanorod catalysts demonstrate regenerative ability for carbon monoxide oxidation at room temperature. Pd/CeO 2− x catalysts with 75 % decreased catalytic activity can be regenerated and restored almost 100 % of their original catalytic activity by exposing them to ambient conditions for 24 h. X‐ray spectroscopy studies of the atomic structures and oxidation states of palladium in the catalyst found that the formation of disordered palladium oxide is partly accountable for its observed regenerative catalytic property.