水処理で汚染物質を分解する分子の測定手法を開発（Measuring pollutant-destroying molecules used in water treatment）

2026-03-04 アルゴンヌ国立研究所（ANL）

＜関連情報＞

• https://www.anl.gov/article/measuring-pollutantdestroying-molecules-used-in-water-treatment
• https://pubs.acs.org/doi/abs/10.1021/acscatal.4c06271

電気触媒材料から生成される活性酸素種の定量 Quantification of Reactive Oxygen Species Produced from Electrocatalytic Materials

Abstract

Oxygen electrochemistry goes beyond O₂, as the formation of reactive oxygen species (ROS) such as H₂O₂ and O₃ during water oxidation is key in the destruction of persistent pollutants in water remediation technologies as well as in the degradation of fuel cell and electrolyzer components. In this study, we developed an in situ method utilizing the rotating ring-disk electrode technique to quantify the formation of O₂, O₃, and H₂O₂ species across a broad pH range (1–8.3). Oxygen selectivity trends over Pt, IrO₂, and PbO₂ surfaces reveal that even O₂ evolution catalysts may produce small yet measurable amounts of ROS, further modulated by pH and electrode potential. These findings emphasize the need to probe the selectivity of oxygen electrochemistry for a more complete picture of advanced materials for electrochemical technologies.