Redox-Reversible Iron Orthovanadate Cathode for Solid Oxide Steam Electrolyzer

Lizhen Gan; Lingting Ye; Cong Ruan; Shigang Chen; Kui Xie

doi:10.1002/advs.201500186

Redox-Reversible Iron Orthovanadate Cathode for Solid Oxide Steam Electrolyzer

Adv Sci (Weinh). 2015 Dec 3;3(2):1500186. doi: 10.1002/advs.201500186. eCollection 2016 Feb.

Authors

Lizhen Gan¹, Lingting Ye¹, Cong Ruan², Shigang Chen², Kui Xie³

Affiliations

¹ Key Lab of Design and Assembly of Functional Nanostructure Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P.R. China; Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P.R. China.
² School of Mechanical and Automobile Engieering and School of Materials Science and Engineering Hefei University of Technology Hefei Anhui 230009 P.R. China.
³ Key Lab of Design and Assembly of Functional Nanostructure Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P.R. China; Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P.R. China; School of Mechanical and Automobile Engineering and School of Materials Science and Engineering Hefei University of Technology Hefei Anhui 230009 P.R. China.

Abstract

A redox-reversible iron orthovanadate cathode is demonstrated for a solid oxide electrolyser with up to 100% current efficiency for steam electrolysis. The iron catalyst is grown on spinel-type electronic conductor FeV₂O₄ by in situ tailoring the reversible phase change of FeVO₄ to Fe⁺FeV₂O₄ in a reducing atmosphere. Promising electrode performances have been obtained for a solid oxide steam electrolyser based on this composite cathode.

Keywords: FeV2O4; FeVO4; cathodes; solid oxide electrolyzers; spinels.