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Kwak, Ja Hun
Molecular Catalysis lab
Research Interests
  • Heterogeneous catalysis, molecular catalysis, ASlumima, zeolites

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Low-temperature carbon monoxide oxidation catalysed by regenerable atomically dispersed palladium on alumina

Cited 20 times inthomson ciCited 19 times inthomson ci
Title
Low-temperature carbon monoxide oxidation catalysed by regenerable atomically dispersed palladium on alumina
Author
Peterson, Eric J.Delariva, Andrew T.Lin, SenJohnson, Ryan S.Guo, HuaMiller, Jeffrey T.Kwak, JahunPeden, Charles H. F.Kiefer, BorisAllard, Lawrence F.Ribeiro, Fabio H.Datye, Abhaya K.
Keywords
RAY PHOTOELECTRON-SPECTROSCOPY; TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; GAMMA-ALUMINA; CO OXIDATION; THETA-AL2O3(010) SURFACE; SINGLE; ATOMS; PD; ABSORPTION
Issue Date
2014-09
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE COMMUNICATIONS, v.5, no., pp.1 - 11
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.
URI
https://scholarworks.unist.ac.kr/handle/201301/9762
DOI
10.1038/ncomms5885
ISSN
2041-1723
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ECHE_Journal Papers
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