ScholarlyCommons

Title

Polarization-Induced Hysteresis in CuCo-Doped Rare Earth Vanadates SOFC Anodes

Author(s)

Lawrence Adijanto, University of Pennsylvania
Venu Balaji Padmanabhan, University of Pennsylvania
Raymond J. Gorte, University of PennsylvaniaFollow
John M. Vohs, University of PennsylvaniaFollow

Document Type

Journal Article

Date of this Version

9-14-2012

Abstract

The physical and electrochemical properties of strontium substituted cerium vandates in which a portion of the cerium cations have been substituted with transition metals (Ce_0.8Sr_0.1Cu_0.05TM_0.05VO_4−0.5x, TM = Ni or Co) were investigated and their suitability for use in solid oxide fuel cell (SOFC) anodes was assessed. Upon reduction at elevated temperature, Cu and Co or Cu and Ni were exsolved from the electronically conductive Ce_1−xSr_xVO₄ lattice to produce Cu-Ni and Cu-Co catalytic nanoparticles. The Ce_0.8Sr_0.1Cu_0.05Co_0.05VO₃ appears to have high activity and relatively high hydrocarbon tolerance, suggesting that intimate contact between the exsolved Cu and Co and that the majority of the Co nanoparticles must be at least partially coated with the Cu. The electrochemical performance when used in anodes operating on hydrogen has been characterized, and the results demonstrate the exsolution of both metals from the host lattice; but observed dynamic changes in the structure of the resulting metal nanoparticles as a function of SOFC operating conditions complicate their use in SOFC anodes.

Comments

Adijanto, L., Padmanabhan, V. B., Gorte, R. J., Vohs, J. M. (2012). Polarization-Induced Hysteresis in CuCo-Doped Rare Earth Vanadates SOFC Anodes. Journal of The Electrochemical Society, 159(11), F751-F756. doi: 10.1149/2.042211jes

© The Electrochemical Society, Inc. 2012. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in J. Electrochem. Soc. 2012, Volume 159, Issue 1.

Recommended Citation

Adijanto, L., Padmanabhan, V., Gorte, R. J., & Vohs, J. M. (2012). Polarization-Induced Hysteresis in CuCo-Doped Rare Earth Vanadates SOFC Anodes. Retrieved from https://repository.upenn.edu/cbe_papers/158