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


Autoria(s): Zhou, Wei; Sunarso, Jaka
Data(s)

01/01/2013

Resumo

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.

Identificador

http://hdl.handle.net/10536/DRO/DU:30058892

Idioma(s)

eng

Publicador

American Chemical Society

Relação

http://dro.deakin.edu.au/eserv/DU:30058892/zhou-enhancingbifunctional-2013.pdf

http://doi.org/10.1021/jz401169n

Direitos

2013, American Chemical Society

Palavras-Chave #electrocatalyst #metal air battery #oxygen evolution #oxygen reduction #perovskite #phase transition
Tipo

Journal Article