Transfer hydrogenolysis of aromatic ethers promoted by the bimetallic Pd/Co catalyst
Transfer hydrogenolysis of aromatic ethers promoted by the bimetallic Pd/Co catalyst
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DOI：
10.1016/j.cattod.2019.06.071
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发表时间：
2020-11-01
期刊：
影响因子：
5.3
通讯作者：
Asakura, K.
中科院分区：
文献类型：
--
作者：
Mauriello, F.;Ariga-Miwa, H.;Asakura, K.
以共沉淀Pd/Co为非均相催化剂，异丙醇为供氢体/溶剂，研究了木质素衍生芳香醚（苄基苯基醚、苯乙基苯基醚和二苯醚）的转移氢解反应。在240 ℃下180分钟后获得苄基苯基醚向甲苯和环己醇的定量转化。到目前为止，如果与商业Pd/C和Co基催化体系相比，Pd/Co催化剂更有效，同时显示出良好的可重复使用性。通过XRD、SEM、TEM、H-2-TPR、XPS和EXAFS分析等完整的物理化学表征证实，芳醚中CeO键断裂能力的增强与Pd-Co系综的形成有关。
The transfer hydrogenolysis of lignin derived aromatic ethers (benzyl phenyl ether, phenethyl phenyl ether and diphenyl ethers) have been investigated by using the coprecipitated Pd/Co as heterogeneous catalyst and 2propanol as H-donor/solvent. A quantitative conversion of benzyl phenyl ether into toluene and cyclohexanol was obtained after 180 min at 240 degrees C. The bimetallic Pd/Co catalyst is, by far, more efficient if compared to commercial Pd/C and Co-based catalytic systems showing, at the same time, a good reusability. The enhanced ability in the CeO bond cleavage in aromatic ethers is related to the formation of bimetallic Pd-Co ensembles, arisen from the preparation procedure adopted, as confirmed by a complete physico-chemical characterization that includes XRD, SEM, TEM, H-2-TPR, XPS and EXAFS analysis.