当前位置: X-MOL 学术J. Saudi Chem. Soc. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Palladium/graphitic carbon nitride catalyst for selective oxygen transfer in Wacker oxidation
Journal of Saudi Chemical Society ( IF 5.6 ) Pub Date : 2020-07-12 , DOI: 10.1016/j.jscs.2020.07.003
Xi Gao , Zhangshuai Li , Weiting Yan , Xinhua Peng

Nanoscaled palladium particles supported on graphitic carbon nitride (Pd0/g-C3N4) is prepared to improve the oxygen transfer in Wacker oxidation via chemical reduction method. From the analysis of FT-IR, XRD, SEM, TEM, XPS and ICP, Pd0 particles are firmly combined with g-C3N4 layers, and sub-surface ones occupy most of the components. It is worth mentioning that graphene oxide (GO), which is completely recyclable without further pollution, can be used as a ‘solid weak acid’ taking the place of H2SO4 and CF3COOH. Under the optimization conditions, as many as 46 kinds of olefins are transferred into corresponding products with satisfactory yields, and o-methyl styrene gets the highest yield of 94%. After five times of recycling experiment, the yield of acetophenone only decreases by about 7.0% in the uniform reaction process. In virtue of former research results and molecular electrostatic potential, a possible mechanism is put forward to explain the catalytic process.



中文翻译:

瓦克氧化中选择性氧转移的钯/石墨氮化碳催化剂

制备了负载在石墨氮化碳上的纳米级钯颗粒(Pd 0 / gC 3 N 4),以通过化学还原方法改善瓦克氧化过程中的氧转移。通过FT-IR,XRD,SEM,TEM,XPS和ICP的分析,Pd 0颗粒与gC 3 N 4层牢固结合,并且亚表面的颗粒占据了大部分成分。值得一提的是,氧化石墨烯(GO)可以完全回收利用而不会造成进一步污染,可以代替H 2 SO 4和CF 3用作“固体弱酸”。哦 在最优化条件下,将多达46种烯烃以令人满意的产率转化为相应的产物,而甲基苯乙烯的最高产率为94%。经过五次循环实验,在均匀反应过程中,苯乙酮的收率仅降低了约7.0%。根据以前的研究成果和分子静电势,提出了一种可能的机理来解释催化过程。

更新日期:2020-07-12
down
wechat
bug