Highly Active and Stable Co3O4/ZSM-5 Catalyst for Propane Oxidation: Effect of the Preparation Method
Highly Active and Stable Co3O4/ZSM-5 Catalyst for Propane Oxidation: Effect of the Preparation Method
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高活性、稳定的Co3O4/ZSM-5丙烷氧化催化剂：制备方法的效果
DOI：
10.1021/cs400068v
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发表时间：
2013-06-01
期刊：
影响因子：
12.9
通讯作者：
Wang, Yanqin
中科院分区：
文献类型：
--
作者：
Zhu, Zengzan;Lu, Guanzhong;Wang, Yanqin
采用浸渍法（IM）、沉积沉淀法（DP）和水热法（HT）制备了Co 3 O 4/ZSM-5催化剂。通过低温N2吸附、XRD、FT-IR吸收光谱、XPS、H2-TPR、TEM和CO化学吸附等手段，考察了它们对丙烷完全氧化反应的催化性能，并对其物化性质进行了表征。结果表明，Co 3 O 4/ZSM-5催化剂对丙烷氧化的催化活性高于1.5wt%Pd/ZSM-5催化剂，且制备方法对Co 3 O 4/ZSM-5催化剂的活性有显著影响。在4种不同方法制备的Co_3O_4/ZSM-5催化剂中，高温法制备的催化剂对丙烷氧化的催化活性最高，其催化活性大小顺序为高温法> DP法> IM法。对于Co_3O_4/ZSM-5（DP）催化剂，沉淀剂对其催化活性有明显的影响。以碳酸氢铵沉淀法制备的DP催化剂为例，考察了其催化性能。
Co3O4 supported on ZSM-5 (Co3O4/ZSM-5) catalysts were prepared by impregnation (IM), deposition precipitation (DP), and hydrothermal (HT) methods. Their catalytic performances for the total oxidation of propane were tested, and their physicochemical properties were investigated by low-temperature N2 adsorption, XRD, FT-IR absorption spectroscopy, XPS, H2-TPR, TEM, and CO chemisorption. The results show that the catalytic activity of Co3O4/ZSM-5 for propane oxidation is higher than that of 1.5 wt % Pd/ZSM-5, and the preparation methods remarkably affect the catalytic activity of Co3O4/ZSM-5. Among four Co3O4/ZSM-5 catalysts prepared by different methods, the catalyst prepared by the HT method possesses the highest catalytic activity for propane oxidation, and their catalytic activities are varied in the order of HT > DP > IM. For the Co3O4/ZSM-5 (DP) catalysts, the precipitant has an evident influence on their catalytic activities. For instance, the DP catalyst prepared with ammonium bicarbonate precipitan...