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Title: CO oxidation over Pd/<img src='/image/spc_char/gamma.gif' border=0>-FeMnO<sub>3</sub> catalyst
Authors: Kulshreshtha, S K
Sharma, S
Vijayalakshmi, R
Sasikala, R
Issue Date: May-2004
Publisher: CSIR
Series/Report no.: C01B 31/18, B01J 23/54
Abstract: <img src='/image/spc_char/gamma.gif' border=0>-FeMnO<sub>3</sub> samples with and without Pd metal impregnation have been prepared by co-precipitation method and investigated by powder X-ray diffraction and <sup>57</sup>Fe Mossbauer spectroscopy techniques, for its bulk characteristics. Catalytic activity of these samples has been studied for CO oxidation reaction by injecting CO or (CO+O<sub>2</sub>) pulses over their surface, with a view to delineate the role of Pd metal and reducible cations during this reaction. Pd metal impregnation over the surface of <img src='/image/spc_char/gamma.gif' border=0>-FeMnO<sub>3</sub>, leads to significant improvement in its catalytic activity, particularly at lower temperatures. Based on these experiments, clear evidence for the low temperature (T~350 K) disproportionation of CO over the surface of Pd metal particles and lattice oxygen incorporation during CO oxidation reaction, have been presented. From the comparative study of Fe<sub>2</sub>O<sub>3</sub>, Mn<sub>2</sub>O<sub>3</sub> and FeMnO<sub>3</sub>, the existence of any synergistic effects between Fe<sup>3+</sup> and Mn<sup>3+</sup> cations, is ruled out for FeMnO<sub>3</sub>, mixed oxide system.
Description: 427-433
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.11(3) [May 2004]

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