Development of Ternary Cathodes Using MyCe1–x–yMnxO2–δ (M = La, Gd) as Catalysts for Oxygen Reduction Reactions1. Issue 3 (6th February 2014)

• Record Type: Journal Article
• Authors: Liu, L.; Zhao, Z.; Zhang, X.; Cui, D.; Tu, B.; Ou, D.; Cheng, M.; Steiner, Nadia; Hissel, Daniel; Bultel, Yann
• Is Part Of: Fuel cells. Volume 14:Issue 3(2014:Jun.)
• Page Start: 364
• Page End: 371
• Publication Date: 2014-02-06
• Subjects: Fuel cells -- Periodicals; 621.312429
• DOI: 10.1002/fuce.201300163
• Languages: English
• ISSNs: 1615-6846

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>M_{<italic>y</italic>}Ce_1–_{<italic>x</italic>}_–_{<italic>y</italic>}Mn_{<italic>x</italic>}O_2–δ (M = La, Gd) oxides have been investigated as oxygen reduction catalysts for LSM–YSZ based ternary cathodes. M_yCe_1–_{<italic>x</italic>}_–_{<italic>y</italic>}Mn_{<italic>x</italic>}O_2–δ samples are characterized by X‐ray diffraction (XRD), temperature programmed reduction of H₂ (H₂‐TPR), and temperature programmed desorption of O₂ (O₂‐TPD). The results show that the incorporation of M (M = La, Gd) ions increases the solution limit of Mn in the solid solutions, which increases the amount of oxygen vacancies and promotes oxygen adsorption and dissociation processes. The ternary cathodes show much higher electrochemical performance than LSM–YSZ binary cathode, and greatly accelerate oxygen dissociative adsorption and diffusion of oxygen species. The M_{<italic>y</italic>}Ce_1–_{<italic>x</italic>}_–_{<italic>y</italic>}Mn_{<italic>x</italic>}O_2–δ catalysts exhibit greatly high activity for oxygen reduction at intermediate temperature. The ternary cathodes have high stability and high resistance to CO₂ at 600 °C.</p> </abstract>