Pd/PEI-GNs复合材料的制备及对对硝基苯酚的电催化还原性能  

Synthesis of Pd/PEI-GNs Composites as Electrocatalyst for Reduction of p-Nitrophenol

作　　者：罗明洪[1] 夏克坚[1] 周光华[1] 葛文[1] 

机构地区：[1]南昌师范学院化学系,南昌330032

出　　处：《高等学校化学学报》2016年第12期2268-2274,共7页Chemical Journal of Chinese Universities

基　　金：江西省教育厅重点科技项目(批准号:GJJ151248);南昌师范学院重点科研项目(批准号:16KJZD01)和南昌师范学院重点学科建设项目(批准号:NSXK20141003)资助~~

摘　　要：以聚乙烯亚胺(PEI)功能化的石墨烯(PEI-GNs)为载体,利用电化学还原法制备了Pd/PEI-GNs复合物.采用红外光谱仪、X射线光电子能谱仪、X射线粉末衍射仪和扫描电子显微镜等对复合物的组成、结构和形态进行了表征.结果表明,Pd/PEI-GNs复合物中Pd颗粒均匀分散在PEI-GNs基底上.采用循环伏安法、交流阻抗法和计时电流法等电化学方法研究了Pd/PEI-GNs复合物的电化学性能.结果表明,制备的复合物催化剂对对硝基苯酚还原具有较好的催化活性和稳定性,这主要是由于Pd纳米颗粒在PEI-GNs载体上均匀分散以及PEI-GNs优异的电子传递能力.Pd/PEI-GNs composites were prepared by the electrochemical deposition technique with poly（ethyleneimine） functionalized graphene（PEI-GNs） as the support. The as- prepared composites were characterized by FTIR,XRD,XPS and SEM. The results showed that Pd/PEI-GNs composites were prepared and Pd particles were uniformly dispersed on the PEI-GNs support. Cyclic voltammetry（CV）,electrochemical impedance spectroscopy（EIS） and chronoamperometric curves were used to investigate the electrocatalytic activities of the Pd/PEI-GNs composites. The results indicated that the as- prepared composites presented better electrocatalytic activity and stability towards p-nitrophenol reduction. The enhancement in electrochemical performance of the Pd/PEI-GNs composites can be attributed to the synergistic effect of highly dispersed Pd nanoparticles on the PEI-GNs and higher electron transfer of PEI-GNs.

关 键 词：石墨烯 钯纳米粒子 对硝基苯酚 电催化还原 

分 类 号：O646[理学—物理化学]