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|Title:||La 0.8 Sr 0.2 MnO 3 based perovskite with A-site deficiencies as high performance bifunctional electrocatalyst for oxygen reduction and evolution reaction in alkaline||Authors:||Yuan, RH
Oxygen evolution reaction
Oxygen reduction reaction
|Issue Date:||2019||Publisher:||Elsevier||Source:||Energy procedia, 2019, v. 158, p. 5804-5810 How to cite?||Journal:||Energy procedia||Abstract:||In this work, the A-site cation deficient perovskites (La 0.8 Sr 0.2 ) 1-x MnO 3 (x=0, 0.02, 0.05)(LSM) and Fe doped perovskite (La 0.8 Sr 0.2 ) 0.95 Mn 0.5 Fe 0.5 O 3 (LSMF) are prepared by sol-gel process assisted with chelating effect of citric acid. The structure, morphology and valence state of the prepared samples were characterized. Their catalytic activities toward oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) were investigated by rotating-disk electrode (RDE). As expected, appropriate introduce of A-site deficiency can enhance both ORR and OER activities. Among the A-site cation deficient perovskites studied, (La 0.8 Sr 0.2 ) 0.95 MnO 3 exhibited the highest ORR and OER activities and, hence, the best bifunctionality. After doping with Fe in the B-site, the (La 0.8 Sr 0.2 ) 0.95 Mn 0.5 Fe 0.5 O 3 perovskite exhibits even better electrochemical catalytic activity which is due to the increase of the concentration of oxygen vacancy as compared with (La 0.8 Sr 0.2 ) 0.95 MnO 3 . Furthermore, (La 0.8 Sr 0.2 ) 0.95 Mn 0.5 Fe 0.5 O 3 showed superior durability than commercial 20wt% Pt/C catalyst. This work indicates that introduce of A-site deficiency and B-site Fe doping in perovskite oxides is an effective strategy to enhance ORR and OER activity for the applications in metal-air batteries.||Description:||10th International Conference on Applied Energy, ICAE 2018, Hong Kong, 22-25 August 2018||URI:||http://hdl.handle.net/10397/80898||EISSN:||1876-6102||DOI:||10.1016/j.egypro.2019.01.548||Rights:||© 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)Peer-review under responsibility of the scientific committee of ICAE2018 – The 10th International Conference on Applied Energy.
The following publication Yuan, R. H., He, Y., He, W., Ni, M., & Leung, M. K. (2019). La0. 8Sr0. 2MnO3 based perovskite with A-site deﬁciencies as high performance bifunctional electrocatalyst for oxygen reduction and evolution reaction in alkaline. Energy Procedia, 158, 5804-5810 is available at https://doi.org/10.1016/j.egypro.2019.01.548
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Citations as of Oct 15, 2019
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