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CECAL, Alexandru; LUPAŞCU, Tudor; HAUTA, O-r; GORODEA, I.; PALAMARU, Mircea; IORDAN, Alexandra-Raluca; IORDAN, A.. Catalytic property of double layered perovskites a2mm’o6 for radiolytical split of water . In: Chemistry Journal of Moldova. 2009, nr. 1(4), pp. 118-122. ISSN 1857-1727.
|Chemistry Journal of Moldova|
|Numărul 1(4) / 2009 / ISSN 1857-1727 /ISSNe 2345-1688|
This paper deals with a study of water splitting by gamma rays in the presence of some double perovskites A2MM’O6 and also Sr2Fe1-xTa1 xO6. The irradiation is performed using 60Co as a source with 3·104 Ci activity and 8.3 kGy/h dose rate, which simulated the radioactive wastes, resulted from reprocessing of spent nuclear fuel elements much more active: 108-109 Ci. The stable products of radiolysis, as well as the other chemical species are measured by mass spectrometry. The calculated radiation yield (GH2) generally decreases in the order: Sr2Fe1-xTa1 xO6 (x=0.5; 0.4; 0.3; 0.1) > Ca2AlTaO6 > Sr2AlTaO6 > Ba2AlTaO6, under the given experimental conditions; the yield was higher in the presence of these catalysts than in their absence.
catalytic effect, double perovskites, hydrogen production, water radiolysis