Selective Hydrogenation of Cinnamaldehyde Catalyzed by ZnO-Fe2O3 Mixed Oxide Supported Gold Nanocatalysts
Selective Hydrogenation of Cinnamaldehyde Catalyzed by ZnO-Fe2O3 Mixed Oxide Supported Gold Nanocatalysts
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DOI：
10.3390/catal8020060
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发表时间：
2018-02
期刊：
影响因子：
3.9
通讯作者：
Wei Wang;Yan Xie;Shaohua Zhang;Xingai Liu;M. Haruta;Jiahui Huang
中科院分区：
文献类型：
--
作者：
Wei Wang;Yan Xie;Shaohua Zhang;Xingai Liu;M. Haruta;Jiahui Huang
采用共沉淀法和沉积-沉淀法分别制备了ZnO-Fe 2 O3复合氧化物和负载型金纳米催化剂。在140 °C和1.0MPa氢压下，研究了不同ZnO-Fe_2 O_3复合氧化物负载的纳米金催化剂对肉桂醛的加氢反应。结果表明，Fe/Zn摩尔比对ZnO-Fe_2 O_3复合氧化物负载金纳米催化剂的选择加氢催化活性有很大影响。在这些负载型金纳米催化剂中，Au/Zn 0.7Fe 0.3Ox（Au负载量为1.74 wt %）表现出最高的肉桂醛转化率和对肉桂醇的高选择性。Au/Zn 0. 7 Fe 0. 3 Ox催化剂的优异催化活性与其大的比表面积、小的金纳米颗粒和低温下良好的H2解离能力密切相关。
ZnO-Fe2O3 mixed oxides and supported gold nanocatalysts were prepared by using coprecipitation and deposition–precipitation methods, respectively. Cinnamaldehyde hydrogenation over various ZnO-Fe2O3 mixed oxides supported gold nanocatalysts have been investigated at 140 °C and a hydrogen pressure of 1.0 MPa. The molar ratio of Fe to Zn was found to greatly affect the selective hydrogenation catalytic activity of ZnO-Fe2O3 mixed oxide supported gold nanocatalysts. Among these supported gold nanocatalysts in this work, Au/Zn0.7Fe0.3Ox (Au loading of 1.74 wt %) exhibited the highest conversion of cinnamaldehyde and high selectivity to cinnamal alcohol. The excellent catalytic activity of Au/Zn0.7Fe0.3Ox was tightly associated with a large surface area, small gold nanoparticles, and good H2 dissociation ability at low temperature.