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- W2051982803 abstract "Pd ion substituted Ce1-xMxO2-delta (M = Ti, Zr, Hf) have been prepared by a single step solution combustion method. Two atom% Pd ion substitution in the title compounds is confirmed by X-ray diffraction (XRD) and Pd ion charge state and redox properties have been determined by X-ray photoelectron spectroscopy (XPS) and H2/TPR studies. While Pd ion in CeO2 (Ce0.98Pd0.02O2-delta) showed higher catalytic activity for CO oxidation than Pd metal impregnated over CeO2, further increase in the catalytic activity is observed with Pd ion in Ce1-xTi(Hf)xO2 and a decrease in the activity with Pd ion in Ce1-xZrxO2. Effective charge on Pd ion could be varied by its substitution in these solid solutions Ce1-xMxO2 (M = Ti, Zr & Hf) and also in TiO2 compared to Pd ion in PdO. Effective positive charge on Pd ion is determined from the core level binding energy shift of Pd(3d5/2) peak with respect to Pd metal. Rate of CO oxidation increased and activation energy decreased with increase in effective charge on the Pd ion in the Pd ion substituted fluorites." @default.
- W2051982803 created "2016-06-24" @default.
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- W2051982803 date "2009-01-01" @default.
- W2051982803 modified "2023-09-25" @default.
- W2051982803 title "Noble metal ionic catalysts: correlation of increase in CO oxidation activity with increasing effective charge on Pd ion in Pd ion substituted Ce<sub>1−x</sub>M<sub>x</sub>O<sub>2−δ</sub>(M = Ti, Zr and Hf)" @default.
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- W2051982803 doi "https://doi.org/10.1039/b814742f" @default.
- W2051982803 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19122902" @default.
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