Structural effect of tungsten oxides on selective oxidation of cyclopentene to glutaraldehyde
Structural effect of tungsten oxides on selective oxidation of cyclopentene to glutaraldehyde
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DOI：
10.1016/j.catcom.2006.03.006
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发表时间：
2006-11
影响因子：
3.7
通讯作者：
Yan Lu;Hengbo Yin;Huixiong Wu;Hua Liu;Tingshun Jiang;Y. Wada
中科院分区：
文献类型：
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作者：
Yan Lu;Hengbo Yin;Huixiong Wu;Hua Liu;Tingshun Jiang;Y. Wada
以钨酸铵为原料，分别用硝酸、盐酸、乙酸和硫酸为沉淀剂，制备了水合氧化钨（WO3·H2O或WO3·0.33H2O）、水合钨酸（H2WO4·H2O）和无定形氧化钨。在水溶液氧化环戊烯合成戊二醛反应中，无定形、水合程度较低的氧化钨比水合钨酸和一水氧化钨具有更高的催化活性。H2O2与无定形或水化程度较低的氧化钨之间的弱相互作用有利于戊二醛的生成。
Tungsten oxides with different chemical structures, such as hydrated tungsten oxide (WO3·H2O or WO3·0.33H2O), tungstic acid hydrate (H2WO4·H2O), and amorphous tungsten oxide, were prepared starting from ammonium tungstate and using nitric, hydrochloric, acetic, and sulfuric acids as precipitating reagents, respectively. Amorphous and less hydrated tungsten oxides exhibited higher catalytic activities than tungstic acid hydrate and tungsten oxide monohydrate did in the catalytic oxidation of cyclopentene to glutaraldehyde with aqueous H2O2. The weak interaction between H2O2and amorphous or less hydrated tungsten oxide was beneficial to the formation of glutaraldehyde.