Perovskite LSCM impregnated with vanadium pentoxide for high temperature carbon dioxide electrolysis

Xiaozhen Zhang, Lingting Ye, Jianping Hu, Jie Li, Weihui Jiang, Chung Jen Tseng, Kui Xie

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Perovskite La0.75Sr0.25Cr0.5Mn0.5O3-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 V2O5 nanocatalyst is impregnated in LSCM cathode to enhance electrocatalytic performance. Electrochemical measurements show that the loading of 2 wt% V2O5 significantly improves electrode activity and accordingly reduces electrode polarization resistance from 2.6 Ω•cm2 for LSCM to 1.2 ΩCm2 for V2O5-LSCM in pure hydrogen. The current densities and Faradic efficiencies with V2O5-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.

Original languageEnglish
Pages (from-to)32-40
Number of pages9
JournalElectrochimica Acta
Volume212
DOIs
StatePublished - 10 Sep 2016

Keywords

  • Carbon dioxide
  • Electrolysis
  • LSCM
  • Solid oxide electrolyzer
  • VO

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