Perovskite LSCM impregnated with vanadium pentoxide for high temperature carbon dioxide electrolysis. (10th September 2016)

• Record Type: Journal Article
• Authors: Zhang, Xiaozhen; Ye, Lingting; Hu, Jianping; Li, Jie; Jiang, Weihui; Tseng, Chung-Jen; Xie, Kui
• Is Part Of: Electrochimica acta. Volume 212(2016)
• Page Start: 32
• Page End: 40
• Publication Date: 2016-09-10
• Subjects: LSCM -- V2O5 -- Solid oxide electrolyzer -- Carbon dioxide -- Electrolysis; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.06.137
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Perovskite La0.75 Sr0.25 Cr0.5 Mn0.5 O3-δ (LSCM) has been used as a typical cathode for CO2 electrolysis in oxide-ion conducting solid oxide electrolyzers; however, the limited electrocatalytic activity still restricts electrode kinetic process. In this work, catalytic-active V2 O5 nanocatalyst is impregnated in LSCM cathode to enhance electrocatalytic performance. Electrochemical measurements show that the loading of 2 wt% V2 O5 significantly improves electrode activity and accordingly reduces electrode polarization resistance from 2.6 Ωcm 2 for LSCM to 1.2 ΩCm 2 for V2 O5 -LSCM in pure hydrogen. The current densities and Faradic efficiencies with V2 O5 -LSCM electrode are remarkably enhanced by 30% and 40% in contrast to bare LSCM electrode in the voltage region of 1.2-2.0 V at 800 °C for direct carbon dioxide electrolysis, respectively.