title: A facile synthesis of palladium nanoparticles supported on functional carbon nanotubes and its novel catalysis for ethanol electrooxidation.
abstract: In this study, a novel material, palladium nanoparticles-carboxylic functional carbon nanotubes (PdNPs-CFCNTs), based on PdNPs supported on CFCNTs was synthesized by a facile spontaneous redox method. The material reveals high electrochemical activity and excellent catalytic characteristic for alcohol electrooxidation on a glassy carbon electrode (GCE) in an alkaline medium. The preparation mechanism was studied by the galvanic cell effect between PdCl(4)(2-) and functional defect sites on CFCNTs. Results from UV-visible absorption spectroscopy and electrochemical impedance spectroscopy revealed that the reduction of PdCl(4)(2-) to metallic Pd was successfully achieved. Morphologies of PdNPs supporting on CFCNTs (PdNPs-CFCNTs) were also characterized by transmission electron micrograph. PdNPs-CFCNTs with the best electrocatalytic characteristics were obtained under the condition as: the weight ratio of Pd to CFCNTs was kept at 2:1, the temperature was kept at 70 degrees C in the synthesis, and the scan rate of the applied potential was selected at 60 mV s(-1). The results indicate that PdNPs-CFCNTs could be a great potential material in direct ethanol fuel cells and ethanol sensors.
authors.affiliation: Department of Chemistry and Key Laboratory of Analytical Sciences of the Ministry of Education, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
authors.forename: Xiao-mei
authors.initials: XM
authors.lastname: Chen
authors.forename: Zhi-jie
authors.initials: ZJ
authors.lastname: Lin
authors.forename: Tian-tian
authors.initials: TT
authors.lastname: Jia
authors.forename: Zhi-min
authors.initials: ZM
authors.lastname: Cai
authors.forename: Xiao-li
authors.initials: XL
authors.lastname: Huang
authors.forename: Ya-qi
authors.initials: YQ
authors.lastname: Jiang
authors.forename: Xi
authors.initials: X
authors.lastname: Chen
authors.forename: Guo-nan
authors.initials: GN
authors.lastname: Chen