Observation of bubble layer formed on hydrogen and oxygen gas-evolving electrode in a magnetic field

被引：68

作者：

Matsushima, Hisayoshi ^{[1
]}

Iida, Takami ^{[2
]}

Fukunaka, Yasuhiro ^{[2
]}

机构：

[1] Univ Yamanashi, Interdisciplinary Grad Sch Med & Engn, Kofu, Yamanashi 4008511, Japan

[2] Kyoto Univ, Grad Sch Energy Sci, Sakyo Ku, Kyoto 6068501, Japan

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2012年 / 16卷 / 02期

关键词：

Magnetic field; Water electrolysis; Void fraction; Hydrogen gas bubble; Oxygen gas bubble; PHASE FREE-CONVECTION; WATER ELECTROLYSIS; MASS-TRANSFER; OHMIC RESISTANCE; EVOLUTION; MICROGRAVITY; DESORPTION; SURFACE; GROWTH; MODEL;

D O I：

10.1007/s10008-011-1392-x

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The evolution of hydrogen and oxygen gasses in a 0.36-M KOH electrolyte was observed in a magnetic field, and the void fraction was calculated by a hydrodynamic model. Both gasses evolving on a platinum working electrode formed a bubble layer which increased the ohmic resistance. In addition to natural convection, magnetohydrodynamic (MHD) convection in a magnetic field improved the electrolytic conductivity by supplying a fresh solution (pumping effect) and removing gas bubbles. The MHD convection reduced the void fraction of hydrogen gas more than that of oxygen, which can be explained by the poor wettability of the oxygen evolving electrode.

引用

页码：617 / 623

页数：7

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