Enhanced electrochemical performance and stability of (La,Sr)MnO3-(Gd,Ce)O2 oxygen electrodes of solid oxide electrolysis cells by palladium infiltration
Access Status
Authors
Date
2012Type
Metadata
Show full item recordCitation
Source Title
ISSN
Collection
Abstract
Palladium-impregnated or infiltrated La0.8Sr0.2MnO3–Gd0.2Ce0.8O1.9 (LSM-GDC) composites are studied as the oxygen electrodes (anodes) for the hydrogen production in solid oxide electrolysis cells (SOECs). The incorporation of small amount of Pd nanoparticles leads to a substantial increase in the electrocatalytic activity and stability of the LSM-GDC oxygen electrodes. The electrode polarization resistance (RE) at 800 °C on a 0.2 mg cm−2 Pd-infiltrated LSM-GDC electrode is 0.13 Ω cm2, significantly smaller than 0.42 Ω cm2 for the reaction on the pure LSM-GDC electrodes. The overpotential loss is also substantially reduced after the Pd infiltration; at an anodic overpotential 50 mV and 800 °C, the current increases from 0.15 A cm−2 for the pure LSM-GDC anode to 0.47 A cm−2 on a 0.3 mg cm−2 Pd-infiltrated LSM-GDC. The infiltrated Pd nanoparticles enhance the stability of the LSM-GDC oxygen electrodes and are most effective in the promotion of the diffusion, exchange and combination processes of oxygen species on the surface of LSM-GDC particles, leading to the increase in the oxygen evolution reaction rate.
Related items
Showing items related by title, author, creator and subject.
-
Chen, Kongfa; Ai, Na; Jiang, San Ping (2014)Effect of Gd0.2Ce0.8O1.9 (GDC) infiltration on the performance and stability of La0.8Sr0.2MnO3 (LSM) oxygen electrodes on Y2O3-stabilized ZrO2 (YSZ) electrolyte has been studied in detail under solid oxide electrolysis ...
-
Ai, Na; Chen, Kongfa; Liu, Shaomin; Jiang, San Ping (2013)Nano-structured Pd infiltrated and Pd0.95M0.05 (M = Mn, Co, Ce, and Gd) co-infiltrated Y2O3-ZrO2 (YSZ) electrodes are studied as the oxygen electrodes of solid oxide electrolysis cells (SOECs). The infiltrated Pd-YSZ ...
-
He, Shuai; Chen, K.; Saunders, M.; Li, J.; Cui, C.; Jiang, San Ping (2017)© 2017 The Electrochemical Society. All rights reserved. The interfaces between cathode and electrolyte in solid oxide fuel cells (SOFCs) play a critical role in the overall performance and durability, and are generally ...