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This paper reports a study of the decomposition of water by gamma radiolysis in the presence of zeolites ZSM-5, SAPO-5, and MOR. The irradiation is performed using 60Co as a source with 1.12×1015 Bq activity at a 8.3 kGy/h dose rate. 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: H-ZSM-5&gt;Na-ZSM-5&gt;H-SAPO-5&gt;MOR under the given experimental conditions; the yield is higher in the presence of these catalysts than in their absence.

Hydrogen yield from water radiolysis in the presence of zeolites