物理化学学报 >> 2010, Vol. 26 >> Issue (08): 2139-2143.doi: 10.3866/PKU.WHXB20100804

电化学 上一篇    下一篇

刺状Pd纳米粒子的室温合成及其对乙醇氧化的电催化性能

许加欣, 姜艳霞, 廖洪钢, 陈声培, 孙世刚   

  1. 固体表面物理化学国家重点实验室, 厦门大学化学化工学院化学系, 福建 厦门 361005
  • 收稿日期:2010-02-10 修回日期:2010-04-24 发布日期:2010-07-23
  • 通讯作者: 姜艳霞, 孙世刚 E-mail:yxjiang@xmu.edu.cn; sgsun@xmu.edu.cn
  • 基金资助:

    国家自然科学基金(20833005, 20873116, 60936003)和超分子结构和材料国家重点实验室(SKLSSM200910)资助项目

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).

摘要:

室温下以氯化胆碱为稳定剂, 用化学还原法合成了刺状Pd纳米粒子(Pdnthorn000). 透射电子显微镜和电化学循环伏安研究结果表明Pdnthorn000具有较高密度的台阶位, 与商业Pd黑催化剂相比较, Pdnthorn000对乙醇氧化的电催化活性显著提高, 氧化电流密度是商业Pd黑催化剂的1.2倍(-0.40 - -0.30 V) - 1.5倍(-0.65 - -0.40 V), 起始氧化电位和峰电位均负移50 mV. 相同电流密度下, Pdnthorn000催化剂对乙醇的氧化电位均更低.

关键词: 电催化, 刺状结构, Pd纳米粒子, 台阶位, 乙醇氧化

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