Relationship between bubble generation behavior and hydrogen evolution reaction performance at high current densities during alkaline water electrolysis

被引：12

作者：

Kitajima, Daisuke ^{[1
]}

Misumi, Ryuta ^{[1
,2
,3
]}

Kuroda, Yoshiyuki ^{[2
,3
]}

Mitsushima, Shigenori ^{[2
,3
]}

机构：

[1] Yokohama Natl Univ, Grad Sch Engn Sci, Dept Chem & Life Sci, 79-5 Tokiwadai,Hodogaya ku, Yokohama, Kanagawa 2408501, Japan

[2] Yokohama Natl Univ, Div Mat & Chem Engn, Fac Engn, 79-5 Tokiwadai,Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan

[3] Yokohama Natl Univ, Inst Adv Sci, Adv Chem Energy Res Ctr, 79-5 Tokiwadai,Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan

来源：

ELECTROCHIMICA ACTA | 2024年 / 502卷

关键词：

Alkaline water electrolysis; Hydrogen evolution reaction; Bubble coverage; Tortuosity; In situ observation; CATALYTIC-ACTIVITY; AQUEOUS-SOLUTIONS; GAS; NI; ELECTRODES; KINETICS; CATHODES; OXYGEN; H-2;

D O I：

10.1016/j.electacta.2024.144772

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Alkaline water electrolysis (AWE) has attracted considerable attention in recent years as a means to produce hydrogen. However, one problem associated with AWE is the increase in overpotential at high current densities, which is attributed to bubble coverage on the electrode surface. It is therefore important to understand the bubble generation behavior to ultimately reduce the overpotential. In this study, a method was established to measure the resistance components from the electrolytic reaction and bubble coating separately based on the use of electrochemical impedance spectroscopy. The results were related to the bubble generation behavior on a Ni electrode, as observed using a high-speed camera. Consequently, a model for the degradation of the electrolytic efficiency due to bubble generation was devised, and the effect of the bubble coverage layer was quantitatively evaluated.

引用

页数：13

共 36 条

[1] Probing the Dissolved Gas Concentration on the Electrode through Laser-Assisted Bubbles [J].