Enhanced electrocatalytic activity and stability of Pd-based bimetallic icosahedral nanoparticles towards alcohol oxidation reactions |
| |
| Affiliation: | 1. School of Chemistry and Chemical Engineering, Qingdao University, Ningxia Road 308, Qingdao 266071, China;2. Qingdao Hengxing University of Science and Technology, Jiushui East Road 588, Qingdao 266100, China;1. Jiangsu Provincial Key Laboratory of Solar Energy Science and Technology/Energy Storage Joint Research Center, School of Energy and Environment, Southeast University, No.2 Si Pai Lou, Nanjing 210096, China;2. School of Electronic Engineering, Nanjing Xiao Zhuang University, 211171 Nanjing, China;3. State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi''an Jiaotong University, Xian 710049, China;1. School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China;2. Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230026, People''s Republic of China;1. Facultad de Ciencias Básicas, Universidad de Medellín, Medellín, Colombia;2. Department of Chemistry, Division of Fundamental Sciences (IEFQ), Technological Institute of Aeronautics (ITA), São Jose dos Campos, São Paulo CEP:12228-900, Brazil;1. Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P. O. Box. 87317-51167, Iran;2. Department of Chemistry, Faculty of Sciences, University of Hormozgan, Bandarabbas, 71961, Iran;3. College of MLT, University of Ahl Al Bayt, Kerbala, Iraq;4. Building and Construction Engineering Technology Department, AL-Mustaqbal University College, Hillah 51001, Iraq;5. Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, I. R. Iran |
| |
| Abstract: | Modulating components and surface structure of Pd-based nanomaterials were efficient strategies to improve electro-catalytic activity. Bimetallic Pd-based nano-catalysts with core-shell or alloy structure are reported to be promising for fuel cell reactions. In this work, we have successfully constructed PdCu@Pd core-shell icosahedral nano-catalysts via the hydrothermal method. Based on this method, we have successfully synthesized alloyed PdPt icosahedrons, PdAg icosahedrons, and monometallic Pd icosahedrons. Among all nanoparticles as prepared, PdCu@Pd core-shell icosahedral nano-catalyst exhibits the highest mass activity to ethylene glycol oxidation reaction (EGOR) as 7.4 A mg−1, which is 7.4 times higher than that of commercial Pd/C (1.0 A mg−1). In addition, its mass activity for glycerol oxidation reaction (GOR) is 6.3 A mg−1, which is 6.5 times higher than that of commercial Pd/C (0.96 A mg−1). In the test of stability, PdCu@Pd core-shell icosahedral nano-catalyst keeps the highest current density throughout the time domain. The enhanced electro-catalytic performance can mainly attribute to the modification of electronic generated from strain between Pd shell and PdCu core as well as defect from twinned structure. This study can provide a reminder to researchers to further design novel Pd-based nano-catalysts by tuning surface structure and composition at the same time. |
| |
| Keywords: | Pd-based Icosahedral nanoparticles Bimetallic Electro-catalysis Alcohol oxidation reactions |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
