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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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Active states of Pd and Cu in carbon-supported Wacker-type catalysts for low-temperature CO oxidation

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Title
Active states of Pd and Cu in carbon-supported Wacker-type catalysts for low-temperature CO oxidation
Other Titles
Active states of Pd and Cu in carbon-supported Wacker-type catalysts for low-temperature CO oxidation
Author
Park, Eun DuckChoi, Sun HeeLee, Jae Sung
Keywords
PDCL2-CUCL2 CATALYSTS; XAFS CHARACTERIZATION; MONOXIDE OXIDATION; ETHYLENE; PHASE
Issue Date
2000-06
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY B, v.104, no.23, pp.5586 - 5594
Abstract
Carbon-supported Wacker-type catalysts that showed high activities in CO oxidation at low temperatures were characterized with X-ray diffraction (XRD) and X-ray absorption fine structure (XAFS) techniques in order to correlate the catalytic activity with the structures and electronic states of Pd and Cu. The active states of palladium and copper were found to be a molecular Pd(II) species coordinated with chlorine ions and Cu(II) compounds, respectively, with solid Cu2Cl(OH)(3) being the particularly effective copper species. A larger than stoichiometric amount of CuCl2 was required for high activity over the carbon support. The presence of chlorine ion was essential to sustain these active palladium and copper species. The solid copper phase of Cu2Cl(OH)(3) was superior to traditional CuCl2 . 2H(2)O for reoxidizing the reduced palladium species via Wacker chemistry. The chemical environment of copper appeared to have crucial effects in sustaining the active Pd(II) species, which is required for high activities in low-temperature CO oxidation
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DOI
10.1021/jp000583z
ISSN
1520-6106
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ECHE_Journal Papers
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