New Electrochemical Oscillation Appeared in H2O2-H2SO4-Pt System by Addition of Na2SO4 and K2SO4

被引：2

作者：

Mukouyama, Y. ^{[1
]}

Hasegawa, M. ^{[1
]}

Yamamoto, S. ^{[1
]}

Nakanishi, S. ^{[2
]}

Okamoto, H. ^{[1
]}

机构：

[1] Tokyo Denki Univ, Sch Sci & Engn, Div Sci, Hatoyama, Saitama 3500394, Japan

[2] Univ Tokyo, Dept Appl Chem, Bunkyo Ku, Tokyo 1138656, Japan

来源：

STUDENT POSTERS (GENERAL) - 224TH ECS MEETING | 2014年 / 58卷 / 25期

关键词：

POTENTIAL OSCILLATION; HYDROGEN-PEROXIDE; EVOLUTION; ELECTROLYSIS; DYNAMICS; WATER;

D O I：

10.1149/05825.0099ecst

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We have studied the H2O2 reduction on Pt in 0.10 M H2SO4 + 0.25 M H2O2 solutions and found that a new potential oscillation, named oscillation H, appears under current controlled conditions when Na2SO4 or K2SO4 is added to the solutions. The oscillation range is between ca. 0.1 and 0.6 V, where a negative differential resistance (NDR) is formed. Oscillation H, therefore, is classified into a hidden-NDR oscillator. We have also found that oxygen bubbles evolve constantly from the electrode surface during oscillation H and showed that the local pH at the electrode surface is basic due to the presence of the salts. Therefore, the oxygen bubbles are produced probably by the catalytic decomposition of HO2-formed via the dissociation of H2O2 at the electrode surface.

引用

页码：99 / 107

页数：9

共 16 条

[1] Stabilizing effect of a magnetic field on a gas bubble produced at a microelectrode [J].