University of Oulu

Long Kuai, Erjie Kan, Wei Cao, Marko Huttula, Sami Ollikkala, Taru Ahopelto, Ari-Pekka Honkanen, Simo Huotari, Wenhai Wang, Baoyou Geng, Mesoporous LaMnO3+δ perovskite from spray−pyrolysis with superior performance for oxygen reduction reaction and Zn−air battery, Nano Energy, Volume 43, 2018, Pages 81-90, ISSN 2211-2855, https://doi.org/10.1016/j.nanoen.2017.11.018

Mesoporous LaMnO3+δ perovskite from spray−pyrolysis with superior performance for oxygen reduction reaction and Zn−air battery

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Author: Kuai, Long1,2; Kan, Erjie1,2; Cao, Wei3;
Organizations: 1College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Center for Nano Science and Technology, Anhui Normal University. No.1, Beijing East Road, Wuhu 241000, PR China
2School of Biological and Chemical Engineering, Anhui Polytechnic University, Middle Beijing Road, Wuhu 241000, PR China
3Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FIN-90014 Oulu, Finland
4Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe201901303596
Language: English
Published: Elsevier, 2018
Publish Date: 2019-11-07
Description:

Abstract

Oxygen reduction reaction (ORR) is the key reaction in various electrochemical energy devices. This work reports an inexpensive mesoporous LaMnO3+δ perovskite for ORR with remarkable activity, synthesized by a facile aerosol-spray assisted approach. The mesoporous LaMnO3+δ material shows a factor of 3.1 higher activity (at 0.9 V vs. RHE) than LaMnO3 obtained from co-precipitation method (LMO-CP). Based on results of x-ray absorption near-edge spectroscopy (XANES), x-ray photoelectron spectroscopy (XPS) and Brunauer–Emmett–Teller (BET) analysis, we conclude that the chemical state of surface Mn and the high surface area are the sources to the notably enhanced activity. The study of Zn-air batteries device further confirmed a Pt/C comparable performance in the practical devices with the novel mesoporous LaMnO3+δ catalyst, where the power density at 200 mA/cm2 is only 2.1% lower than in the battery with same-loaded Pt/C catalyst. Therefore, the high mass activity and low-cost of Mn/La may make LaMnO3+δ further approach to the application of electrochemical devices.

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Series: Nano energy
ISSN: 2211-2855
ISSN-E: 2211-3282
ISSN-L: 2211-2855
Volume: 43
Pages: 81 - 90
DOI: 10.1016/j.nanoen.2017.11.018
OADOI: https://oadoi.org/10.1016/j.nanoen.2017.11.018
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
Subjects:
Funding: This work was supported by the National Natural Science Foundation of China (21271009, 21471006), the Natural Science Foundation of Anhui Provincial Education Department (KJ2017A111), the Programs for Science and Technology Development of Anhui Province (1501021019). W. C. and M. H. acknowledge EU Regional Development Fund and Council of Oulu Region. S. O., T. A., A.-P. H. and S. H. were supported by the Academy of Finland (project 1295696).
Copyright information: © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
  https://creativecommons.org/licenses/by-nc-nd/4.0/