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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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SURFACE SPECIES ON THE OXIDIZED K2CO3/MOS2 AND THEIR EFFECTS ON CATALYTIC CARBON-MONOXIDE HYDROGENATION

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Title
SURFACE SPECIES ON THE OXIDIZED K2CO3/MOS2 AND THEIR EFFECTS ON CATALYTIC CARBON-MONOXIDE HYDROGENATION
Other Titles
SURFACE SPECIES ON THE OXIDIZED K2CO3/MOS2 AND THEIR EFFECTS ON CATALYTIC CARBON-MONOXIDE HYDROGENATION
Author
WOO, Hee ChulKIM, Jae ChangNAM, In SikLee, Jae SungCHUNG, Jong ShikKim, Young Gul
Keywords
ALCOHOL FORMATION; CARBON MONOXIDE HYDROGENATION; CATALYST CHARACTERIZATION (ESR-IR-TPD-XPS-XRD); MOLYBDENUM SULFIDE; POTASSIUM CARBONATE; SURFACE SPECIES
Issue Date
1993-10
Publisher
ELSEVIER SCIENCE BV
Citation
APPLIED CATALYSIS A-GENERAL, v.104, no.2, pp.199 - 214
Abstract
The properties of K2CO3/MoS2 oxidized at room temperature and the effects of thermal treatments of the sample on its catalytic activity and physicochemical properties were investigated by means of temperature-programmed desorption (TPD), X-ray photoelectron spectroscopy, infrared, X-ray diffraction and electron spin resonance. The TPD exhibited four peaks of SO2 evolution. Among them, three peaks originated from the decomposition of surface SO42- species with C-2v and T-d symmetries. The decomposition of sulfate by heat treatment resulted in the production of SO2 and oxidized molybdenum species such as MoO3+ which were converted to MoO2 by further heat treatment. The thermal treatment of oxidized catalyst above 1013 K caused a solid-state reaction between potassium and molybdenum, producing K2MoO4. The treated catalyst on which the surface SO42- species had been removed, recovered their selectivity to alcohol formation in CO-H-2 reactions which had been lost when the catalysts were oxidized
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DOI
10.1016/0926-860X(93)85098-A
ISSN
0926-860X
Appears in Collections:
ECHE_Journal Papers
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