Gold-Nano Particles Supported on Na-Y and H-Y Types Zeolites: Activity and Thermal Stability for CO Oxidation Reaction
Gold-Nano Particles Supported on Na-Y and H-Y Types Zeolites: Activity and Thermal Stability for CO Oxidation Reaction
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DOI：
10.1007/s10562-008-9724-x
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发表时间：
2009-03
影响因子：
2.8
通讯作者：
S. Jafari;H. Asilian Mahabady;Hossein Kazemian
中科院分区：
文献类型：
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作者：
S. Jafari;H. Asilian Mahabady;Hossein Kazemian
使用氯金酸 (HAuCl4) 溶液将金纳米颗粒 (GNP) 沉积在 Na-Y 和 H-Y 沸石基底上。然后对合成的催化剂进行了表征，并使用管式固定床微型反应器在常压下研究了对 CO 氧化反应的催化活性。研究发现，在 Au/Na-Y 和 Au/H-Y 新鲜催化剂上，CO 转化率在 20°C 下分别可以达到 100% 和 5%。还通过在 400°C 下处理催化剂 4 小时来研究催化剂的热稳定性。热稳定性测试后，催化剂在20°C下的活性测试表明，Au/Na-Y催化剂的CO转化率下降至65%，而Au/H-Y催化剂在20°C下的活性提高至15%。表征测试表明，热预处理后沸石载体的结构保持不变。
Gold nano particles (GNP) were deposited on Na-Y and H-Y zeolite substrates using chloroauric acid (HAuCl4) solution. The synthesized catalysts were then characterized and the catalytic activity toward CO oxidation reaction was investigated using a tubular fix bed micro reactor under atmospheric pressure. It was found that CO conversion of 100% and 5% can be achieved at 20 °C on Au/Na-Y and Au/H-Y fresh catalysts, respectively. Thermal stability of catalysts was also investigated by treating the catalysts at 400 °C for 4 h. After thermal stability test, activity tests of the catalysts at 20 °C were shown that CO conversion of Au/Na-Y catalyst was decreased to 65% whereas the activity of the Au/H-Y at 20 °C was increased up to 15%. Characterization tests were revealed that the structures of the zeolitic supports were remained unchanged after thermal pretreatment.