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 shu

Effect of Ligands on Formation and Electroactivity for Ethanol Oxidation of Pd Nano-Catalysts

CHEN Qing-Hua ,
YI Qing-Feng ^,

1.
School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China

Corresponding author: YI Qing-Feng,
Received Date: 30 December 2014
Available Online: 26 April 2015
Fund Project: 国家自然科学基金(No.21376070,20876038) (No.21376070,20876038)湖南省自然科学基金(No.14JJ2096)资助项目。 (No.14JJ2096)

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.
- Pd catalysts;ethanol oxidation;ligand;fuel cell
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