Abstract
In this study, Pt/Ce 1− x Zr x catalysts with different Zr mole concentration ( x = 0, 0.2, 0.5, 0.8, 1) have been tested to evaluate their effects on hydrogen iodide (HI) decomposition for hydrogen production in the sulfur-iodine (SI or IS) cycle at various temperatures. The Pt/Ce 1− x Zr x catalysts strongly enhanced the HI conversion to H 2 by comparison with blank test, especially the Pt/Ce 0.8Zr 0.2 catalyst. BET, XRD, TEM, EDS, TPR were performed for catalysts characterization. It was found that, through introducing ZrO 2 into Pt/CeO 2, a synergistic effect between Pt and CeO 2-ZrO 2 solid solution was different from Pt and CeO 2 yield, such as improvement of the thermal stability and increase of Pt-O-Ce reducibility. Among the three samples containing Zr, the one with 20 mol% displayed the best activity for hydrogen production.
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