LaNi(4.7)Al_(0.3)单颗粒微电极电化学行为的研究  

Studies on Electrochemical Behavior of LaNi_(4.7)Al_(0.3)Single Micro-particle Electrode

作　　者：刘军[1] 杨毅夫[1] 邵惠霞[1] 高峰[1] 熊跃[1] 陈卫华[1] 

机构地区：[1]武汉大学化学与分子科学学院,武汉430072

出　　处：《高等学校化学学报》2006年第10期1962-1964,共3页Chemical Journal of Chinese Universities

基　　金：国家'八六三'计划(批准号:2005AA501440)资助.

摘　　要：A new single micro-particle electrode(SMPE)fabrication technique the inlaid SMPE technique was introduced in this paper.The preparation procedure of an alloy SMPE was described in detail.Based on the SMPE technique,the electrochemical behavior of LaNi_ 4.7Al_ 0.3 spherical particles with two different radii was investigated.The results of CV study showed that more detailed electrochemical information of the alloy can be provided on the alloy SMPE as compared with that on the composite alloy electrode.The results of potential step study depict that H diffusion coefficient in LaNi_ 4.7Al_ 0.3 keeps almost constant when the size of the alloy particle changes,and the diffusion coefficient measured on the alloy SMPE[(2.5—2.6)×10-9 cm 2/s] is about one order larger than that detected on the composite alloy electrode.A new single micro-particle electrode （SMPE） fabrication technique ——the inlaid SMPE technique was introduced in this paper. The preparation procedure of an alloy SMPE was described in detail. Based on the SMPE technique, the electrochemical behavior of LaNi4. 7 Al0. 3 spherical particles with two different radii was investigated. The results of CV study showed that more detailed electrochemical information of the alloy can be provided on the alloy SMPE as compared with that on the composite alloy electrode. The results of potential step study depict that H diffusion coefficient in LaNi4. 7 Al0. 3 keeps almost constant when the size of the ahoy particle changes, and the diffusion coefficient measured on the alloy SMPE [ （2.5—2. 6 ） × 10^-9 cm^2/s] is about one order larger than that detected on the composite alloy electrode.

关 键 词：储氢合金 LaNi4.7Al0.3 单颗粒微电极 循环伏安曲线 扩散系数 

分 类 号：O646[理学—物理化学]