LaNiO3的焙烧温度对甲醇水蒸气重整制氢CuO/LaNiO3催化剂的影响

采用溶胶凝胶法合成了LaNiO_3钙钛矿型氧化物载体,再采用浸渍法制备了CuO/LaNiO_3催化剂,并通过XRF、XRD、BET、H_2-TPR和XPS等手段对催化剂进行了表征,考察了LaNiO_3钙钛矿的焙烧温度对CuO/LaNiO_3催化剂结构及其催化甲醇水蒸气重整制氢性能的影响。结果表明,载体焙烧温度主要影响了催化剂的表面晶格氧缺位,活性组分和载体间的相互作用。当载体焙烧温度为800℃时,催化剂表面氧空穴较多,活性组分与载体间相互作用较强,因此,催化甲醇水蒸气重整制氢活性较好。

Effect of calcination temperature of LaNiO3 on CuO/LaNiO3 catalyst for hydrogen production via methanol steam reforming

The LaNiO₃ perovskite support was synthesized by sol-gel method. The CuO/LaNiO₃ catalyst was prepared by impregnation method. The catalyst was characterized by XRF, XRD, BET, H₂-TPR and XPS. The effect of calcination temperature of LaNiO₃ perovskite on the structure of CuO/LaNiO₃ catalyst and its catalytic performance for methanol steam reforming were investigated. The results show that the calcination temperature of the support mainly affects the surface oxygen vacancy of the catalyst, the interaction between the active component and the support. When the calcination temperature of the support is 800℃, the surface of the catalyst has more oxygen vacancy, and the interaction between the active component and the support is stronger. Therefore, the hydrogenation activity of methanol steam reforming is higher.