Microstructured Au/Ni-fiber catalyst: Galvanic reaction preparation and catalytic performance for low-temperature gas-phase alcohol oxidation
Microstructured Au/Ni-fiber catalyst: Galvanic reaction preparation and catalytic performance for low-temperature gas-phase alcohol oxidation
复制标题
微结构Au/Ni纤维催化剂：电偶反应制备及其低温气相醇氧化催化性能
DOI：
10.1016/j.jcat.2013.01.020
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发表时间：
2013-05-01
影响因子：
7.3
通讯作者：
Lu, Yong
中科院分区：
文献类型：
--
作者：
Zhao, Guofeng;Deng, Miaomiao;Lu, Yong
通过将Au电沉积到由5vol. %（体积比）Au组成的薄片微纤维结构上，成功地制备了高活性和选择性的金催化剂。8 μ m镍纤维和95体积%空隙率高，具有高导热性和良好的稳定性，适用于醇类的气相氧化。最好的催化剂是Au-4/Ni-纤维-300（Au负载量：4wt%;在空气中在300 ℃下煅烧），对氧化无环、苄基和多元（1，2-丙二醇）醇是有效的。对于苯甲醇，在250 ℃下在660 h试验内实现了95%的转化率和99%的苯甲醛选择性，而在250 ℃下的低Δ T为100%。
The highly active and selective gold catalysts were successfully prepared by galvanically depositing Au onto a thin-sheet microfibrous structure consisting of 5 vol.% 8-mu m Ni-fiber and 95 vol.% voidage, with high heat conductivity and good stability for the gas-phase oxidation of alcohols. The best catalyst was Au-4/Ni-fiber-300 (Au-loading: 4 wt%; calcined at 300 degrees C in air), being effective for oxidizing acyclic, benzylic, and polynary (1,2-propanediol) alcohols. For benzyl alcohol, the conversion of 95% was achieved with 99% selectivity to benzaldehyde within 660 h test at 250 degrees C, while a low Delta T of