罗丽娟¹,崔咪芬¹,费兆阳^1,2,陈献¹,汤吉海¹,乔旭^1,2

• 1:南京工业大学 化学化工学院，江苏省工业节水减排重点实验室，江苏 南京 210009
• 2:南京工业大学 材料化学工程国家重点实验室，江苏 南京 210009

摘要(Abstract)：

选取了六种n型半导体氧化物，采用共沉淀法制备了相应的CuO-ZnO、CuO-Fe₂O₃、CuO-CeO₂、CuO-TiO₂、CuO-BaO、CuO-SnO₂六种Cu基催化剂，并用于催化醋酸异丙酯加氢反应以进行催化性能评价。借助X射线衍射（XRD），H₂程序升温还原（H₂-TPR），N₂O氧化滴定、ICP元素分析、NH₃程序升温脱附（NH₃-TPD）、X射线光电子能谱分析（XPS）等表征手段，比较这6种氧化物对Cu的表面和体相的分散度、Cu活性位比表面积、表面酸性以及与Cu之间的结合能大小，及最终对反应结果的影响。结果发现：6种Cu基催化剂的性能差别较大，催化活性高低依次为：Cu-ZnO、Cu-Fe₂O₃、Cu-CeO₂、Cu-TiO₂、Cu-BaO、Cu-SnO₂。其中Cu-ZnO催化剂因具有最低的还原温度、最高的Cu表面分散度、最大的活性位比表面积、最小的晶粒尺寸以及最大的结合能而表现出最佳的催化活性，具有最低的酸性而呈现最高的乙醇选择性和最低的乙酸乙酯选择性。而Cu-BaO、Cu-SnO₂催化剂还原后主要以铜钡氧化物及铜锡合金的形式存在，因而其催化活性较差，Cu-Fe₂O₃催化剂由于较低的酸性在主产物乙醇选择性方面表现也较好。

关键词(KeyWords)： n型半导体氧化物;醋酸异丙酯;加氢;乙醇;异丙醇

Abstract:

Keywords:

基金项目(Foundation): 江苏高校优势学科建设工程资助项目（PADD）。

作者(Author): 罗丽娟¹,崔咪芬¹,费兆阳^1,2,陈献¹,汤吉海¹,乔旭^1,2

DOI: 10.3969/j.issn.1003-9015.2018.01.016

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