Synthesis, characterization and electrocatalytic studies of palladium–manganese oxyhydroxide nanocomposite towards direct ethylene glycol fuel cell  

作　　者：Ramanujam Kannan Ae Rhan Kim Dong Jin Yoo 

机构地区：[1]R&D Education Center for Specialized Graduate School of Hydrogen and Fuel Cells Engineering, Chonbuk National University, Chonju, Joellabuk-do 561-756, Korea [2]Department of Energy Storage/Conversion Engineering,Hydrogen and Fuel Cell Research Center, Graduate School,Chonbuk National University, Chonju, Joellabuk-do 561-756,Korea [3]Department of Chemistry, Chonbuk National University,Chonju, Joellabuk-do 561-756, Korea

出　　处：《Chinese Science Bulletin》2014年第27期3413-3419,共7页

基　　金：supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011-0010538)

摘　　要：The palladium nanoparticle grafted manganese oxyhydroxide nanorod(MON) electrocatalyst has been synthesized and tested for the electrooxidation of ethylene glycol(EG) in an alkaline medium. The MON was prepared using the hydrothermal method and the Pd nanoparticles were coated on the MON using an in situ reduction method. The nanocatalyst thus prepared was characterized by powder X-ray diffraction, scanning electron microscopy, high resolution transmission electron microscopy, energy dispersive X-ray spectroscopy and electrochemical methods. The microscopic studies confirm the formation of MON and reveal that the Pd nanoparticles were grafted uniformly on the MON. In the voltammetric studies, the Pd/MON catalyst exhibited a six-fold improved peak current for ethylene glycol electrooxidation compared with the C/Pd. The EG electrooxidation reaction performances of the Pd/MON nanocatalyst in the alkaline solutions containing different quantities of EG were tested through cyclic voltammetry. The catalytic removal of the poisonous intermediates formed during electrooxidation of EG was explained. The present study shows that MON can act as an active support for the Pd nanocatalyst.The palladium nanoparticle grafted manganese oxyhydroxide nanorod （MON） electrocatalyst has been synthesized and tested for the electrooxidation of ethylene glycol （EG） in an alkaline medium. The MON was prepared using the hydrothermal method and the Pd nano- particles were coated on the MON using an in situ reduction method. The nanocatalyst thus prepared was characterized by powder X-ray diffraction, scanning electron microscopy, high resolution transmission electron microscopy, energy dispersive X-ray spectroscopy and electrochemical methods. The microscopic studies confirm the formation of MON and reveal that the Pd nanoparticles were grafted uniformly on the MON. In the voltammetric studies, the Pd/MON catalyst exhibited a six-fold improved peak current for ethylene glycol electrooxidation compared with the C/Pd. The EG electrooxidation reaction performances of the Pd/MON nanocatalyst in the alkaline solutions containing different quantities of EG were tested through cyclic voltammetry. The catalytic removal of the poisonous intermediates formed during electrooxidation of EG was explained. The present study shows that MON can act as an active support for the Pd nanocatalyst.

关 键 词：钯纳米粒子 氢氧化锰 乙二醇 化学研究 燃料电池 纳米复合 合成 高分辨透射电子显微镜 

分 类 号：TM911.4[电气工程—电力电子与电力传动] TQ223.162[化学工程—有机化工]