アニオン交換膜形水電解触媒層における気泡生成の可視化と性能評価

抄録

Anion exchange membrane water electrolysis (AEMWE) is a prospective method for high performance and low-cost hydrogen production. However, a fundamental understanding of the reaction and transport phenomena in the porous electrode of AEMWE devices is needed to improve the cell performance. The objective of this study is to investigate the bubble generation behavior on the catalyst layer under cell operation and the relationship between bubble generation and cell overpotentials. In this study, an experimental setup for direct observation of the catalyst layer surface in an AEMWE cell was assembled and water electrolysis in an alkaline environment was performed. The generated bubbles on the catalyst layer were visualized during the cell operation and the relationship between bubble generations and overpotentials of the cell was investigated.