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, 4 17: 2982-2988. doi:10.1021/jz401169n


Author Zhou, Wei
Sunarso, Jaka
Title Enhancing bi-functional electrocatalytic activity of perovskite by temperature shock: a case study of LaNiO3-δ
Journal name Journal of Physical Chemistry Letters   Check publisher's open access policy
ISSN 1948-7185
Publication date 2013-09-05
Sub-type Article (original research)
DOI 10.1021/jz401169n
Volume 4
Issue 17
Start page 2982
End page 2988
Total pages 7
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2014
Language eng
Subject 2500 Materials Science
Abstract 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-δ. LaNiO3-δ 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 (ΔE). 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.
Keyword Electrocatalyst
Metal air battery
Oxygen evolution
Oxygen reduction
Perovskite
Phase transition
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2014 Collection
 
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