Application of Pt loaded graphite felt in SO2-depolarized electrolyzer. (29th August 2022)

• Record Type: Journal Article
• Authors: Ma, Xiaoshan; Ding, Xifeng; Sun, Xinliang; Zhang, Ping; Wang, Laijun; Li, Yingxia; Qu, Yongshui; Chen, Songzhe
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 74(2022)
• Page Start: 31575
• Page End: 31586
• Publication Date: 2022-08-29
• Subjects: Hydrogen production -- Hybrid sulfur (HyS) process -- SO2-depolarized electrolysis (SDE) -- Pt-loaded graphite felt -- Three-dimensional anode; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.07.086
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The three-dimensional anodes for SO2 depolarized electrolysis (SDE) cells are prepared by loading Pt/C on high void content graphite felts, with the method of ultrasonic spray and vacuum suction. SEM results confirm the three-dimensional space distribution of Pt in graphite felts, which ensures sufficient contact between Pt/C and SO2 in anolyte. Comparing with the two-dimensional anodic catalyst layer loaded on the proton exchange membrane in a conventional SDE cell, the application of the three-dimensional anode decreases cell impedance greatly and improves the SDE performance significantly. In this study, 0.63 mg/cm 2 Pt loading amount shows the best performance when Pt/C is double-side-sprayed on graphite felt, and the current density reaches 1.24 A/cm 2 at cell voltage of 1.2 V, as operating at 60 °C and anolyte flow rate of 360 mL/min. The effects of the Pt loading amount, operating temperature and anolyte flow rate on the SDE performance are investigated. Highlights: Pt/C is loaded on graphite felt by ultrasonic spray and vacuum suction. Three-dimensional Pt base anode applied in liquid-fed SDE cells. Three-dimensional anode shows much higher activity than conventional MEA. Double-side-spray method makes Pt-loaded graphite felt more active in SDE cell.