Electrodeposited mesh-type dimensionally stable anode for oxygen evolution reaction in acidic and alkaline media. (12th October 2019)

• Record Type: Journal Article
• Authors: Park, Ji Eun; Lee, Hyunjoon; Oh, Seung-Hyeon; Kang, Sun Young; Choi, Insoo; Cho, Yong-Hun; Sung, Yung-Eun
• Is Part Of: Chemical engineering science. Volume 206(2019)
• Page Start: 424
• Page End: 431
• Publication Date: 2019-10-12
• Subjects: Dimensionally stable anode -- Oxygen evolution electrode -- Ruthenium oxide -- Iridium oxide -- Electrodeposition; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; Chemical engineering; Periodicals; Electronic journals; 660
• DOI: 10.1016/j.ces.2019.05.048
• Languages: English
• ISSNs: 0009-2509

Abstract

Graphical abstract: Highlights: A facile method for preparing a mesh-type dimensionally stable anode is proposed. Electrodeposition conditions were examined to attain uniform electrode. In acidic media, RuO2 /Ti electrode exhibited the highest performance. In alkaline media, DSA obtained with Ru:Ir ratio of 8:2 showed the highest activity. Abstract: A mesh-type dimensionally stable anode (DSA) consisting of ruthenium and iridium with low catalyst loading was prepared as an oxygen evolution reaction catalyst in acidic and alkaline media. The electrodeposition (ED) conditions, i.e., applied current density and total cycle number, and ED solutions with different precursor ratios of ruthenium to iridium are examined to fabricate various DSAs with a uniform thickness, and the effect of the iridium content on the catalytic activity is investigated. Among various DSA electrodes, the DSA electrode without iridium exhibits the highest activity and stability in the acidic medium owing to the high ratio of ruthenium. Conversely, the DSA electrode obtained using the ED solution with the ratio of 8:2 exhibits the highest performance in the alkaline medium. This is because the DSA electrode without iridium showed low stability, which is attributed to the dissolution of ruthenium oxide in the alkaline medium. In addition, two large-scale DSA electrodes optimized in the acidic and alkaline electrolytes show excellent performance, indicating the feasibility of the application of this electrode in practical electrolysis.