Article (Scientific journals)
Tuning the Electronic Structure of LaNiO3 through Alloying with Strontium to Enhance Oxygen Evolution Activity
Liu, Jishan; Jia, Endong; Wang, Le et al.
2019In Advanced Science, 6, p. 1901073
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Keywords :
Nickelates
Abstract :
[en] The perovskite oxide LaNiO3 is a promising oxygen electrocatalyst for renewable energy storage and conversion technologies. Here, it is shown that strontium substitution for lanthanum in coherently strained, epitaxial LaNiO3 films (La1−xSrxNiO3) significantly enhances the oxygen evolution reaction (OER) activity, resulting in performance at x = 0.5 comparable to the state-of-the-art catalyst Ba0.5Sr0.5Co0.8Fe0.2O3−δ. By combining X-ray photoemission and X-ray absorption spectroscopies with density functional theory, it is shown that an upward energy shift of the O 2p band relative to the Fermi level occurs with increasing x in La1−xSrxNiO3. This alloying step strengthens Ni 3d–O 2p hybridization and decreases the charge transfer energy, which in turn accounts for the enhanced OER activity.
Research center :
PhyTheMa
Disciplines :
Physics
Author, co-author :
Liu, Jishan;  Chinese Academy of Sciences
Jia, Endong;  Pacific Northwest National Laboratory
Wang, Le;  Pacific Northwest National Laboratory
Stoerzinger, Kelsey A.;  Pacific Northwest National Laboratory
Zhou, Hua;  Argonne National Laboratory
Tang, Chi Sin;  National University of Singapore
Yin, Xinmao;  National University of Singapore
He, Xu;  Université de Liège - ULiège
Bousquet, Eric  ;  Université de Liège - ULiège > Département de physique > Physique théorique des matériaux
Bowden, Mark E.;  Pacific Northwest National Laboratory
Wee, Andrew T. S.;  National University of Singapore
Chambers, Scott A.;  Pacific Northwest National Laboratory
Du, Yingge;  Pacific Northwest National Laboratory
More authors (3 more) Less
Language :
English
Title :
Tuning the Electronic Structure of LaNiO3 through Alloying with Strontium to Enhance Oxygen Evolution Activity
Publication date :
2019
Journal title :
Advanced Science
ISSN :
2198-3844
Publisher :
Wiley, Weinheim, Germany
Volume :
6
Pages :
1901073
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
Tier-1 supercomputer
CÉCI : Consortium des Équipements de Calcul Intensif
Name of the research project :
AIMED
Funders :
ARC AIMED
Funding number :
Céci facilities funded by F.R.S-FNRS (Grant No. 2.5020.1); Tier-1 supercomputer of the Fédération Wallonie-Bruxelles funded by the Walloon Region (Grant No. 1117545)
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