Show simple item record

dc.contributor.authorShe, S.
dc.contributor.authorYu, J.
dc.contributor.authorTang, W.
dc.contributor.authorZhu, Y.
dc.contributor.authorChen, Y.
dc.contributor.authorSunarso, J.
dc.contributor.authorZhou, W.
dc.contributor.authorShao, Zongping
dc.identifier.citationShe, S. and Yu, J. and Tang, W. and Zhu, Y. and Chen, Y. and Sunarso, J. and Zhou, W. et al. 2018. Systematic Study of Oxygen Evolution Activity and Stability on La1–xSrxFeO3−δ Perovskite Electrocatalysts in Alkaline Media. ACS Applied Materials and Interfaces. 10 (14): pp. 11715-11721.

Perovskite oxide is an attractive low-cost alternative catalyst for oxygen evolution reaction (OER) relative to the precious metal oxide-based electrocatalysts (IrO 2 and RuO 2 ). In this work, a series of Sr-doped La-based perovskite oxide catalysts with compositions of La 1-x Sr x FeO 3-δ (x = 0, 0.2, 0.5, 0.8, and 1) are synthesized and characterized. The OER-specific activities in alkaline solution increase in the order of LaFeO 3-δ (LF), La 0.8 Sr 0.2 FeO 3-δ (LSF-0.2), La 0.5 Sr 0.5 FeO 3-δ (LSF-0.5), SrFeO 3-δ (SF), and La 0.2 Sr 0.8 FeO 3-δ (LSF-0.8). We establish a direct correlation between the enhancement in the specific activity and the amount of surface oxygen vacancies as well as the surface Fe oxidation states. The improved specific activity for LSF-0.8 is clearly linked to the optimum amount of surface oxygen vacancies and surface Fe oxidation states. We also find that the OER performance stability is a function of the crystal structure and the deviation in the surface La and/or Sr composition(s) from their bulk stoichiometric compositions. The cubic structure and lower deviation, as is the case for LSF-0.8, led to a higher OER performance stability. These surface performance relations provide a promising guideline for constructing efficient water oxidation.

dc.publisherAmerican Chemical Society
dc.titleSystematic Study of Oxygen Evolution Activity and Stability on La1–xSrxFeO3−δ Perovskite Electrocatalysts in Alkaline Media
dc.typeJournal Article
dcterms.source.titleACS Applied Materials and Interfaces
curtin.departmentWASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
curtin.accessStatusFulltext not available

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record