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Electrostatic Self‐Assembly of the Composite La 0.7 Sr 0.3 MnO 3 @Ce 0.75 Zr 0.25 O 2 as Electrocatalyst for the Oxygen Reduction Reaction in Aluminum–Air Batteries
Author(s) -
Xue Yejian,
Huang Heran,
Miao He,
Sun Shanshan,
Wang Qin,
Li Shihua,
Liu Zhaoping
Publication year - 2017
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201700270
Subject(s) - catalysis , composite number , materials science , electrocatalyst , adsorption , battery (electricity) , nanocomposite , chemical engineering , nanotechnology , electrode , composite material , chemistry , electrochemistry , physics , power (physics) , biochemistry , quantum mechanics , engineering
Abstract La 1− x Sr x MnO 3 (LSM) has been proposed as one of the best oxygen reduction reaction catalysts (ORRCs) to substitute noble metals. It is well known that an improvement of the oxygen‐adsorption capacity is beneficial to the catalytic activity of LSM perovskites. Herein, the composite material La 0.7 Sr 0.3 MnO 3 @Ce 0.75 Zr 0.25 O 2 (LSM@CZ) has been synthesized by a facile electrostatic self‐assembly method in a two‐step strategy. The CZ nanoparticles are well distributed on the surface of the LSM material. The LSM‐4CZ composite catalyst exhibits a good catalytic activity in alkaline solution. The onset potential, half‐wave potential, and electron transfer number of the LSM‐4CZ composite catalyst are 0.898 V, 0.695 V, and 4, respectively. The LSM‐4CZ composite catalyst has a good durability with current retention of 93.9 % after 80 000 s and it exhibits a much better stability than Pt/C, the retention of which is 83.5 %. If we used LSM‐CZ as the ORRC, the maximum power density of the Al–air battery reached 242.9 mW cm −2 , which is approximately 40 % higher than that of the battery with LSM (177.3 mW cm −2 ). This indicates that the LSM@CZ composite material is a promising cathodic electrocatalyst for metal–air batteries.