Methane conversion reactions over LaNi-YSZ and Ni-YSZ anodes of solid oxide fuel cell. (15th October 2020)

• Record Type: Journal Article
• Authors: Tu, Baofeng; Su, Xin; Yin, Yanxia; Zhang, Fujun; Lv, Xianjun; Cheng, Mojie
• Is Part Of: Fuel. Volume 278(2020)
• Publication Date: 2020-10-15
• Subjects: Solid oxide fuel cell -- Electrochemical oxidation -- LaNi-YSZ anode -- Methane -- Reforming; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2020.118273
• Languages: English
• ISSNs: 0016-2361

Abstract

Graphical abstract: Highlights: The cell with LaNi-YSZ anode shows high performance, especially for methane fuel. Methane conversion reactions over LaNi-YSZ and Ni-YSZ anodes are investigated. Addition of La to nickel anode results in high activity for methane reforming. High activity of LaNi-YSZ anode results in high cell performance for methane fuel. Abstract: Methane conversion reactions over the LaNi-YSZ and Ni-YSZ anodes, which involve methane decomposition, H2 O and CO2 reforming of methane and electrochemical oxidation of H2, CO, C and CH4, are investigated through electrochemical and catalytic performance measurements. The addition of La to the nickel-based anode results in high activity for methane decomposition to hydrogen and carbon deposits. Carbon deposits on the LaNi-YSZ anode as well as on the Ni-YSZ anode could be removed by H2 O and CO2, suggesting high reactivity of carbon deposits. The addition of La to the nickel-based anode also enhances the activity for electrochemical oxidation of hydrogen. On the LaNi-YSZ anode, high catalytic activity for methane reforming supplies enough hydrogen for electrochemical oxidation reaction, while high activity for electrochemical oxidation of hydrogen produces enough H2 O for methane reforming. High activity for methane reforming and electrochemical oxidation of hydrogen results in the high performance of methane-fueled cell with LaNi-YSZ anode.