Au/Co3O4的制备、表征及加氢催化性能研究

摘要

采用化学浸渍法制备出Au/Co3O4纳米复合材料,用透射电子显微镜(TEM)、X射线能谱(EDS)和X射线粉末衍射(XRD)等对其结构和组成进行了表征,并考察了其在对硝基苯酚加氢反应中的催化性能.表征结果表明,Au 纳米粒子很好地分散在 Co3O4载体上.催化性能测试表明,Au/Co3O4纳米复合材料对于对硝基苯酚加氢反应表现出优异的催化活性,TOF值为5.01 min-1;此外,催化剂经过5次恞环仍然保持优异的催化性能.%Au/Co3O4 nanocomposites were synthesized via the chemical impregnation method.The structure and composition of the product obtained were characterized by TEM,EDS and XRD,and the catalytic performance of Au/Co3O4 was evaluated in the hydrogenation reaction of 4-nitrophenol.The results showed that Au nanoparticles were well dispersed on the surface of Co3O4.Au/Co3O4 displayed superior catalytic activity with a turnover frequency(TOF)of 5.01 min-1for the hydrogenation of 4-NP.In addition,Au/Co3O4 remained active after recycling five times.