Citation: CHEN Qing-Hua, YI Qing-Feng. Effect of Ligands on Formation and Electroactivity for Ethanol Oxidation of Pd Nano-Catalysts[J]. Chinese Journal of Inorganic Chemistry, ;2015, (6): 1145-1152. doi: 10.11862/CJIC.2015.171
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Multi-walled carbon nano-tube (MWCNT)-supported palladium nano-catalysts (Pd-EDTA/MWCNT, Pd-Gly/MWCNTand Pd-Ls/MWCNT) were prepared by supporting Pd nano-particles on MWCNT. The Pd nano-particles were obtained from reduction of Pd2+ with NaBH4 as the reducing agent in the presence of EDTA, Glycine(Gly), and sodium lignin sulfonate(Ls) as the ligand, separately. The catalysts were characterized by SEM, TEMand XRD. The electrochemical activity of the catalysts towards ethanol oxidation in alkaline media was examined by cyclic voltammetry (CV) and chronoamperometry (CA). The characterization results show that the Pd-EDTA/MWCNTcatalyst exhibits a smaller particle size and a better dispersity of Pd nanoaprticles compared to the Pd-Gly/MWCNTand Pd-Ls/MWCNTcatalysts. As for the ethanol oxidation in alkaline media, the Pd-EDTA/MWCNTcatalyst exhibits a lower onset potential, a higher current density, a smaller electron transfer resistance, a larger reaction rate, and more stable oxidation current, in comparison with the other two catalysts.
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