A STUDY OF THE REDUCTION PROCESS OF ANODIC PBO2 FILM ON PB IN SULFURIC-ACID-SOLUTION

被引：21

作者：

CAI, WB ^{[1
]}

WAN, YQ ^{[1
]}

LIU, HT ^{[1
]}

ZHOU, WF ^{[1
]}

机构：

[1] FUDAN UNIV,DEPT CHEM,SHANGHAI 200433,PEOPLES R CHINA

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1995年 / 387卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

PBO2; REDUCTION;

D O I：

10.1016/0022-0728(94)03866-2

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The reduction process of the anodic PbO2 film on lead formed at 1.4 V vs. Hg\Hg2SO4 in 4.5 M H2SO4 solution was investigated using chronoamperometry, the photocurrent method and X-ray diffractometry. The experimental results show that most of the beta-PbO2 and part of the alpha-PbO2 in the film can be converted to PbSO4 in about 1 s between 0.9 and 1.0 V vs. Hg\Hg2SO4. At a potential of 0.8 V vs. Hg\Hg2SO4 or less, a slower and more difficult conversion of alpha-PbO2 to alpha-PbOx (1<x<1.4) can be detected by the photoeffects of alpha-PbOx. The alpha-PbOx is gradually converted to t-PbO, which is completed in 75 min during the reduction at 0.6 V vs. Hg\Hg2SO4.

引用

页码：95 / 100

页数：6

共 27 条

[1] PHOTOCURRENT SPECTROSCOPY OF THE LEAD ELECTRODE IN SULFURIC-ACID [J].