Composite Cathode Based on Redox‐Reversible NbTi0.5Ni0.5O4 Decorated with In Situ Grown Ni Particles for Direct Carbon Dioxide Electrolysis. Issue 6 (8th October 2014)

• Record Type: Journal Article
• Authors: Xie, K.; Zhang, J.; Xu, S.; Ding, B.; Wu, G.; Xie, T.; Wu, Y.
• Is Part Of: Fuel cells. Volume 14:Issue 6(2014:Dec.)
• Page Start: 1036
• Page End: 1045
• Publication Date: 2014-10-08
• Subjects: Fuel cells -- Periodicals; 621.312429
• DOI: 10.1002/fuce.201400008
• Languages: English
• ISSNs: 1615-6846

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>In this work, ceramic NbTi_0.5Ni_0.5O₄ is reversibly transformed to nickel‐anchored electronic‐conducting Nb_1.33Ti_0.67O₄ composite for the use of direct carbon dioxide electrolysis at intermediate temperatures. The reduced composites Nb_1.33Ti_0.67O₄ + Ni demonstrate excellent electrical properties, which have been accordingly correlated to electrochemical performance of the composite cathode. The direct electrolysis of 100% CO₂ is then performed and the maximum Faraday current efficiency reaches as high as 65%. It is found that adding 3% H₂O to CO₂ remarkably improves the electrolysis performances and the current efficiency is accordingly enhanced by approximately 20%. The reversible transformation between NbTi_0.5Ni_0.5O₄ and Nb_1.33Ti_0.67O₄ + Ni sample significantly contributes to the promising thermal and redox cycling performance while the anchored interface between Ni and Nb_1.33Ti_0.67O₄ improves cathode stability.</p> </abstract>