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It has been found that the catalytic activity toward the decomposition of ethanol in a fix bed reactor can be greatly improved by loading Pt on the surface of CexZr1-xO2.In this study,we have investigated the effects of different x of Pt/γ-Al2O3/CexZr1-xO2 on the catalytic activity of catalysts.The prepared catalysts were characterized by BET,XRD,and TPR.The BET surface areas of the catalysts decreased with x decreasing.XRD results reveal that deposited Pt dispersed on the CexZr1-xO2 and γ-Al2O3 matrix.The order of catalytic activities is Pt/γ-Al2O3/ Ce0.5Zr0.5O2>Pt/γ-Al2O3/Ce0.25Zr0.75O2>Pt/γ-Al2O3/Ce0.75Zr0.25O2>Pt/γ-Al2O3/CeO2>Pt/γ-Al2O3/ZrO2.Among the catalysts,the reduction peak area of Pt/γ-Al2O3/Ce0.5Zr0.5O2 is the largest and the oxygen mobility is noticeably pro-moted,which is in good harmony with the catalytic activity.Incorporation of ZrO2 into the CeO2 lattice considerably decreases the destruction temperature for ethanol.Based on these observations,the mechanistic role of oxygen mo-bility in the oxidation reaction has been suggested.
It has been found that the catalytic activity toward the decomposition of ethanol in a fix bed reactor can be greatly improved by loading Pt on the surface of CexZr1-xO2. In this study, we have investigated the effects of different x of Pt / γ- Al2O3 / CexZr1-xO2 on the catalytic activity of catalysts. The prepared catalysts were characterized by BET, XRD, and TPR. BET surface areas of the catalysts decreased with x decreasing. XRD results reveal that deposited Pt dispersed on the CexZr1-xO2 and γ-Al2O3 matrix.The order of catalytic activities is Pt / γ-Al2O3 / Ce0.5Zr0.5O2> Pt / γ-Al2O3 / Ce0.25Zr0.75O2> Pt / γ-Al2O3 / Ce0.75Zr0.25O2> Pt / γ -Al2O3 / CeO2> Pt / γ-Al2O3 / ZrO2. Amm the catalysts, the reduction peak area of Pt / γ-Al2O3 / Ce0.5Zr0.5O2 is the largest and the oxygen mobility is noticeably pro- moted, which is in good harmony with the catalytic activity. Corporation of ZrO2 into the CeO2-lapses reduces the destruction temperature for ethanol. Based on these observations, the mechanistic role of oxygen mo-bility in the oxidation reaction has been suggested.