Enhancing bi-functional electrocatalytic activity of perovskite by temperature shock : a case study of LaNiO3-ᵟ

Zhou, Wei and Sunarso, Jaka 2013, Enhancing bi-functional electrocatalytic activity of perovskite by temperature shock : a case study of LaNiO3-ᵟ, Journal of physical chemistry letters, vol. 4, no. 17, pp. 2982-2988.

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Title Enhancing bi-functional electrocatalytic activity of perovskite by temperature shock : a case study of LaNiO3-ᵟ
Author(s) Zhou, Wei
Sunarso, Jaka
Journal name Journal of physical chemistry letters
Volume number 4
Issue number 17
Start page 2982
End page 2988
Total pages 7
Publisher American Chemical Society
Place of publication Washington, D.C.
Publication date 2013
ISSN 1948-7185
1932-7455
Keyword(s) electrocatalyst
metal air battery
oxygen evolution
oxygen reduction
perovskite
phase transition
Summary Perovskite oxide offers an attractive alternative to precious metal electrocatalysts given its low cost and high oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activity. The results obtained in this work suggest a correlation of crystal structure with ORR and OER activity for LaNiO3-?. LaNiO3-? perovskites with different crystal structure were obtained by heating at different temperatures, e.g., 400, 600, and 800 C followed by quenching into room temperature. Cubic structure (relative to rhombohedral) leads to higher ORR and OER activity as well as enhanced bi-functional electrocatalytic activity, e.g., lower difference in potential between the ORR at -3 mA cm-2 and OER at 5 mA cm -2 (?E). Therefore, this work shows the possibility to adjust bi-functional activity through a simple process. This correlation may also extend to other perovskite oxide systems.
Language eng
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2013, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30058892

Document type: Journal Article
Collection: Institute for Frontier Materials
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