期刊
AICHE JOURNAL
卷 63, 期 9, 页码 4003-4012出版社
WILEY
DOI: 10.1002/aic.15756
关键词
CO oxidation; CO2; Ir; subnanometer clusters; single atoms
资金
- National Natural Science Foundation of China [21203181, 21576251, 21573232, 21676269]
- Youth Innovation Promotion Association CAS [2017223]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17020100]
- National Key projects for Fundamental Research and Development of China [2016YFA0202801]
- startup fund of the College of Liberal Arts and Sciences of Arizona State University
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1465057] Funding Source: National Science Foundation
This work reported the adsorption and reaction performance of FeOx 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-2 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-2 but also facilitated the formation of OH species from reaction between H-2 and O-2, thus opening a new reaction pathway between CO and OH species to produce CO2 compared with that between CO and O species on the single-atom counterpart. (C) 2017 American Institute of Chemical Engineers
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