Journal
SOLID STATE IONICS
Volume 286, Issue -, Pages 7-18Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2015.11.023
Keywords
Ba(0.90)Zra(0.9)Fe(0.10)O(3-delta) (BZE10); Electroceramics; Mixed conductor; CO2 mitigation; Electrical conduction; Reaction analysis
Categories
Funding
- National Science Foundation Process and Reaction Engineering Program [1319142]
- Artie McFerrin Department of Chemical Engineering, Texas A M University
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1319142] Funding Source: National Science Foundation
Ask authors/readers for more resources
Mixed conducting BaZr0.9Fe0.1O3-delta perovskite (BZE10) was experimentally investigated in terms of electrochemical, catalytic and material characterization over a cycle of dry CO2, humidified Ar, CO and 'Hy for SOEC or SORFC operation. BZE10 exhibited both mixed ionic-electronic conduction under oxidizing conditions and mixed protonic-electronic conduction under humidified reducing conditions. Upon exposure to dry CO2 atm, the material shows catalytic activity towards CO2 reduction which is attributed to an intermediate carbonate ion formation on the cell surface. Exposure to moisture under inert gas environment suggests only mild interaction with steam; however, under moist CO environment a complex conduction mechanism is displayed alongside significant rates of water-gas-shift while exposure to humidified H-2 indicates n-type semi-conduction. Upon completion of >1000 h of continuous exposure to a range of oxidizing and reducing gas environments, physical inspection of the BZF10 electrochemical cell indicated negligible chemical or mechanical degradation, while)(RD indicates retention of high perovskite phase purity with significant Fe segregation to the intergranular region confirmed via XEDS elemental mapping. (C) 2015 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available