Key aspects of crystalline Mo-V-O-based catalysts active in the selective oxidation of propane
Key aspects of crystalline Mo-V-O-based catalysts active in the selective oxidation of propane
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DOI：
10.1163/156856706777346435
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发表时间：
2006-03
影响因子：
3.3
通讯作者：
W. Ueda;Damian Vitry;Tomokazu Kato;N. Watanabe;Yusuke Endo
中科院分区：
文献类型：
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作者：
W. Ueda;Damian Vitry;Tomokazu Kato;N. Watanabe;Yusuke Endo
首次采用水热法合成了Mo-V-O基复合金属氧化物催化剂，对其结构进行了表征，并在丙烷选择氧化制丙烯酸的反应中进行了测试，并根据催化剂晶体结构对所得结果进行了比较，以阐明多功能金属氧化物催化剂上烷烃选择氧化反应的关键问题。所测试的催化剂是棒状晶体的黑色固体，其在纤维轴方向上具有层状结构，并且在横截面平面上具有金属八面体的各种高维排列。通过比较不同Mo-V-O基催化剂的催化性能，发现金属元素在丙烷选择性氧化反应中的作用与八面体的排列和晶面有关。讨论了催化剂的高维结构所带来的多功能特性和丙烷选择氧化反应的机理。
Mo-V-O-based complex metal oxide catalysts were synthesized hydrothermally for the first time, characterized structurally and tested in the selective oxidation of propane to acrylic acid, and the results obtained were compared on the basis of catalyst crystal structures in order to clarify key aspects of alkane selective oxidation over multifunctional metal oxide catalysts. The catalysts tested were black solids of rod-shaped crystals, which had a layer structure in the direction of fiber axis and various high dimensional arrangements of metal octahedra in the cross-section plane. A strong dependency on the octahedra arrangements and a facet dependency were observed, and the roles of metal elements in the course of selective oxidation of propane were clarified by comparing the catalytic performance of various Mo-V-O-based catalysts. We discuss the multi-functional character derived from high dimensional structures of the catalysts and mechanism of the selective oxidation of propane.