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Abstract：
Catalysis by single isolated atoms of precious metals has attracted much recent interest, as it promises the ultimate in atom efficiency. Most previous reports are on reducible oxide supports. Here we show that isolated palladium atoms can be catalytically active on industrially relevant g-alumina supports. The addition of lanthanum oxide to the alumina, long known for its ability to improve alumina stability, is found to also help in the stabilization of isolated palladium atoms. Aberration-corrected scanning transmission electron microscopy and operando X-ray absorption spectroscopy confirm the presence of intermingled palladium and lanthanum on the gamma-alumina surface. Carbon monoxide oxidation reactivity measurements show onset of catalytic activity at 40 degrees C. The catalyst activity can be regenerated by oxidation at 700 degrees C in air. The high-temperature stability and regenerability of these ionic palladium species make this catalyst system of potential interest for low-temperature exhaust treatment catalysts.
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NATURE COMMUNICATIONS
ISSN： 2041-1723
Year： 2014
Volume： 5
1 1 . 4 7
JCR@2014
1 4 . 7 0 0
JCR@2023
ESI Discipline： MULTIDISCIPLINARY;
ESI HC Threshold：320
JCR Journal Grade：1
CAS Journal Grade：1
Cited Count：
WoS CC Cited Count： 526
SCOPUS Cited Count： 523
ESI Highly Cited Papers on the List： 41 Unfold All
WanFang Cited Count：
Chinese Cited Count：
30 Days PV： 0
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