欢迎访问《电化学(中英文)》期刊官方网站,今天是

电化学(中英文) ›› 2009, Vol. 15 ›› Issue (4): 382-386.  doi: 10.61558/2993-074X.2012

• 研究论文 • 上一篇    下一篇

络合还原法制备碳载钯纳米粒子及其电催化甲酸氧化

何卫;康永印;杜翀;邹志青;张校刚;杨辉;   

  1. 南京航空航天大学材料科学与技术学院;中国科学院上海微系统与信息技术研究所;
  • 收稿日期:2009-11-28 修回日期:2009-11-28 出版日期:2009-11-28 发布日期:2009-11-28

Complex Reduction Preparation of Carbon Supported Pd Nanoparticle Catalyst and its Electrocatalysis for Formic Acid Oxidation

HE Wei1,KANG Yong-yin2,DU Chong2,ZOU Zhi-qing2,ZHANG Xiao-gang1,YANG Hui2*   

  1. (1.College of Materials Science and Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;2.Energy Science and Technology Laboratory,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China
  • Received:2009-11-28 Revised:2009-11-28 Published:2009-11-28 Online:2009-11-28

摘要: 应用柠檬酸钠络合还原法制备了粒径小、分布均匀的碳载Pd纳米粒子(Pd/C).由于柠檬酸钠的络合作用,有效地降低了Pd粒子在形成过程中的团聚.经过简单的热处理调控Pd粒子大小,发现随热处理温度的升高,Pd粒子直径由初始的2.7 nm增大到5.8 nm左右.电化学测试表明Pd/C的Pd粒子尺寸越小,电催化甲酸氧化的质量比活性越高,但如当Pd粒径较大,则催化剂呈现出更高的面积比活性.Pd粒径为3.6 nm的催化剂,其电催化甲酸氧化的稳定性最好.

关键词: Pd/C催化剂, 柠檬酸钠, 络合还原, 甲酸氧化, 尺寸效应

Abstract: A simple procedure involved the complexing of PdCl2 with sodium citrate followed by ethylene glycol reduction has been employed for the preparation of carbon-supported Pd nanoparticles(Pd/C).The XRD and TEM characterizations indicate that Pd nanoparticles with a small particle size were well-dispersed on carbon support.The mean particle sizes of the Pd/C catalysts were found to be increased from 2.7 to 5.8 nm with heat-treatments at different temperature.The mass activity of the Pd/C catalyst for formic acid electrooxidation increased with the decrease in Pd particle size.However,the specific activity increased with Pd particle size.Furthermore,the Pd/C catalyst with a particle size of ca.3.6 nm exhibited the best stability.

Key words: Pd/C catalyst, sodium citrate, complex-reduction, formic acid oxidation, particle size effect

中图分类号: