Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (08): 2139-2143.doi: 10.3866/PKU.WHXB20100804

• ELECTROCHEMISTRY • Previous Articles     Next Articles

Room Temperature Synthesis of Thorn-Like Pd Nanoparticles and Their Enhanced Electrocatalytic Property for Ethanol Oxidation

XU Jia-Xin, JIANG Yan-Xia, LIAO Hong-Gang, CHEN Sheng-Pei, SUN Shi-Gang   

  1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
  • Received:2010-02-10 Revised:2010-04-24 Published:2010-07-23
  • Contact: JIANG Yan-Xia, SUN Shi-Gang E-mail:yxjiang@xmu.edu.cn; sgsun@xmu.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20833005, 20873116, 60936003) and Supramolecular Structure and Materials, State Key Laboratory, China (SKLSSM200910).

Abstract:

Thorn-like Pd nanoparticles (Pdnthorn000) were synthesized at room temperature by a reduction of PdCl2 with L-ascorbic acid and with choline chloride as a stabilizer. Characterization of Pdthornn000 by transmission electron microscopy and cyclic voltammetry indicated that the synthesized Pdthornn000 has a relatively high density of surface step sites. By comparison with the commercially available Pd black catalyst, Pndthorn000 exhibits better catalytic activity towards ethanol oxidation. The oxidation current density on Pdnthorn000 was 1.2 times (-0.40 - -0.30 V) - 1.5 times (-0.65 - -0.40 V) as that on Pd black, and the onset potential and the peak potential of ethanol oxidation both shifted 50 mV in the negative direction. The oxidation potential of ethanol on Pdthornn000 is lower at the same current density.

Key words: Electrocatalysis, Thorn-like structure, Pd nanoparticle, Step site, Ethanol oxidation

MSC2000: 

  • O646