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More active Ir subnanometer clusters than single-atoms for catalytic oxidation of CO at low temperature.
- Source :
- AIChE Journal; Sep2017, Vol. 63 Issue 9, p4003-4012, 10p
- Publication Year :
- 2017
-
Abstract
- This work reported the adsorption and reaction performance of FeO<subscript>x</subscript> supported subnanometer cluster and single-atom Ir catalysts for the oxidation of CO at low temperature. By varying the pretreatment temperature and Ir loading, the single-atom and subnanometer cluster Ir catalysts were obtained. The Ir subnanometer clusters exhibited higher activity for the oxidation of CO with or without the presence of H<subscript>2</subscript> than the single-atom counterpart. By using adsorption microcalorimetry and in situ infrared spectroscopy measurements, it was found that the Ir subnanometer clusters not only promoted the adsorption and reaction of CO and O<subscript>2</subscript> but also facilitated the formation of OH species from reaction between H<subscript>2</subscript> and O<subscript>2</subscript>, thus opening a new reaction pathway between CO and OH species to produce CO<subscript>2</subscript> compared with that between CO and O species on the single-atom counterpart. © 2017 American Institute of Chemical Engineers AIChE J, 63: 4003-4012, 2017 [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00011541
- Volume :
- 63
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- AIChE Journal
- Publication Type :
- Academic Journal
- Accession number :
- 124455033
- Full Text :
- https://doi.org/10.1002/aic.15756