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催化学报  2014 

Ni-Mo氮化物催化剂:合成及其丙烷氨氧化催化性能

DOI: 10.1016/S1872-2067(14)60015-2, PP. 286-293

Keywords: 镍钼氮化物,丙烷氨氧化,丙烯腈,制备方法,氮物种

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Abstract:

?分别采用溶胶-凝胶法、旋转蒸发微波干燥法、共沉淀法、浸渍法和机械混合法制备Ni-Mo氧化物前驱体.以H2和N2的混合气为氮化气体,采用程序升温氮化法合成了镍钼氮化物催化剂.利用X射线衍射、总氮含量分析、X射线光电子能谱及H2程序升温还原对Ni-Mo氧化物前体及氮化物催化剂进行了表征.将上述Ni-Mo氮化物催化剂用于丙烷氨氧化反应中.结果表明,Ni-Mo氧化物前驱体的制备方法影响其氮化物催化剂上丙烷氨氧化反应性能.Ni-Mo氮化物催化剂中氮物种的移动性及反应性对产物丙烯腈选择性的影响较大,共沉淀法制备的催化剂存在大量的活性氮物种,因而具有良好的催化丙烷氨氧化反应活性.

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