Pd nanoparticles immobilized on graphite oxide modified with a base: Highly efficient catalysts for selective hydrogenation of citral
作者:YanFei Zhao、HongYe Zhang、ChangLiang Huang、Sha Chen、Bo Yu、JiLei Xu、ZhiMin Liu
DOI:10.1007/s11426-012-4751-2
日期:2013.2
In this work, the Pd-based catalysts were designed via immobilizing Pd nanoparticles on graphite oxide (GO) modified with organic base, 1,1,3,3-tetramethylguanidine (TMG), which was used for the selective hydrogenation of citral. These catalysts were characterized by various techniques including IR, X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. It was demonstrated
在这项工作中,通过将Pd纳米颗粒固定在用有机碱1,1,3,3-四甲基胍(TMG)改性的氧化石墨(GO)上设计了Pd基催化剂,该有机碱用于柠檬醛的选择性加氢。这些催化剂通过各种技术进行了表征,包括IR,X射线衍射,透射电子显微镜和X射线光电子能谱。结果表明,尺寸小于5 nm的Pd颗粒均匀分布在整个载体上,由于与改性载体的强相互作用,它们处于电子缺陷状态。所得的Pd-TMG / GO催化剂对柠檬醛的选择性氢化显示出高效率,周转频率为7100 h -1以及对香茅醛的优良选择性为89.6%。而且,该催化剂可以重复使用五次而不会造成明显的活性损失,这可能是由于其稳定的结构所致。