引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 541次   下载 582 本文二维码信息
码上扫一扫!
分享到: 微信 更多
Photochargeable Behaviors of Hydrogen Storage Alloy's Electrode Modified with Nano-TiO2 Photocatalyst
Zhang Wenkui*,Gan Yongping,Huang Hui,Zhang Bo,Wang Gaitian,Tu Jiangping
Author NameAffiliationE-mail
Zhang Wenkui* Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310014 echem@zjut.edu.cn 
Gan Yongping Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310014  
Huang Hui Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310014  
Zhang Bo College of Material Science and Chemical Engineering, Zhejiang University, Hangzhou 310027  
Wang Gaitian College of Material Science and Chemical Engineering, Zhejiang University, Hangzhou 310027  
Tu Jiangping College of Material Science and Chemical Engineering, Zhejiang University, Hangzhou 310027  
Abstract:
Nanocrystalline anatase-type TiO2 was prepared by the hydrolysis-precipitaiton method, the rare earth hydrogen storage alloys were modified with the as-prepared TiO2 and the photocharging behavior, and cyclic voltammetry curves and EIS spectra were measured. The experimental results show that the potential has little shift under the light irradiation for the unmodified electrode. However, for the TiO2 modified electrode, a remarkable shift of the potential to negative direction (up to -0.835 V) takes place under the light irradiation, which means the generation of H atom on the electrode surface under the light irradiation. The EIS results also indicate that there exists the absorption of H atom and the following diffusion of H atom into the hydrogen storage alloys under the light irradiation. The FEM observations on the electrode surface show that a large amount of microcracks appear on the electrode surface. These microcracks may be induced by the bulk expansion when the generated hydrogen atoms were absorbed by the hydrogen storage alloys.
Key words:  Titanium dioxide, Hydrogen storage alloy, Photochargeable behavior
FundProject:
表面修饰纳米TiO2的贮氢合金电极的光充电行为
张文魁*,甘永平,黄辉,张博,王改田,涂江平
摘要:
采用水解-沉淀法制备了锐钛矿结构的纳米级TiO2,研究了表面修饰TiO2的贮氢合金电极的光充电、循环伏安及交流阻抗特性.结果表明,表面未修饰TiO2的贮氢合金电极在光照下电极电位基本无变化,而表面修饰TiO2的贮氢合金电极在光照下,电极电位向负方向偏移,可达-0.835 V,表明在光照射条件下电极表面有氢原子形成.电化学阻抗谱的结果也表明,表面修饰电极在光照时表面有吸附氢存在,并存在氢原子向贮氢合金内部的扩散过程.扫描电镜观察表明,表面修饰TiO2的贮氢合金电极在光充电后产生的氢原子被贮氢合金吸收引起膨胀,导致表面出现大量微裂纹.
关键词:  二氧化钛  贮氢合金  光充电性能
DOI:10.1088/1674-0068/18/5/832-836
分类号: