化工进展2017，Vol.36Issue(11)：4087-4092,6.DOI:10.16085/j.issn.1000-6613.2017-0387
氧化石墨烯掺杂锌铝类水滑石负载钯金催化剂的制备及催化性能
Preparation of GO doped Zn-Al LDHs supported palladium gold catalysts and their catalytic performances
马帅 1陈郑 2王家喜1
作者信息
- 1. 河北工业大学化工学院,天津 300130
- 2. 清华大学化学系,北京 100084
- 折叠
摘要
Abstract
Palladium-gold bimetallic nanoparticles deposited on the graphene oxide(GO)doped Zn-Al layered double hydroxide(PdAu/Zn-Al LDHs/GO)were synthesized through the ion exchange-reduction method. The as-prepared supported palladium-gold bimetallic catalysts were characterized by XRD and TEM. The bimetallic nanoparticles loaded by the GO doped Zn-Al LDHs as the carrier is uniform and the particle size is about 2nm. The catalytic activities of as-prepared catalysts were evaluated by using oxidation of benzyl alcohol to benzaldehyde as the model reaction. The effects of carriers and ratio of Pd/Au on the catalytic properties were investigated. The catalytic results showed that the LDHs/GO was the best among the used carriers. As the increase of ratio of Pd/Au,the activity of supported catalyst increased at first,and then decreased,whereas the selectivity of benzaldehyde decreased. With the ratio of Pd/Au being 1:1 at 80℃,the performances of Pd1Au1/Zn-Al LDHs/GO is the best. The catalytic activity increased as the increase of temperature,but the selectivity of benzaldehyde decreased. Under promotion of Pd1Au1/Zn-Al LDHs/GO at 80℃ for 8h,the conversion of benzyl alcohol and selectivity of benzaldehyde was 96％ and 93％,respectively. The catalyst of Pd1Au1/Zn-Al LDHs/GO still maintained excellent catalytic performance after four cycles.关键词
醇/氧化/纳米粒子/水滑石/氧化石墨烯Key words
alcohols/oxidation/nanoparticles/layered double hydroxide/graphene oxide分类
化学化工引用本文复制引用
马帅,陈郑,王家喜..氧化石墨烯掺杂锌铝类水滑石负载钯金催化剂的制备及催化性能[J].化工进展,2017,36(11):4087-4092,6.
