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Title: Tuning the Electronic Structure of LaNiO3 through Alloying with Strontium to Enhance Oxygen Evolution Activity
Authors: Liu, J.
Jia, E.
Wang, L.
Stoerzinger, K.A.
Zhou, H.
Tang, C.S. 
Yin, X. 
He, X.
Bousquet, E.
Bowden, M.E.
Wee, A.T.S. 
Chambers, S.A.
Du, Y.
Keywords: hole doping
oxygen evolution reaction
Issue Date: 2019
Publisher: John Wiley and Sons Inc.
Citation: Liu, J., Jia, E., Wang, L., Stoerzinger, K.A., Zhou, H., Tang, C.S., Yin, X., He, X., Bousquet, E., Bowden, M.E., Wee, A.T.S., Chambers, S.A., Du, Y. (2019). Tuning the Electronic Structure of LaNiO3 through Alloying with Strontium to Enhance Oxygen Evolution Activity. Advanced Science 6 (19) : 1901073. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: 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? x SrxNiO3) 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? ?. 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朞 2p hybridization and decreases the charge transfer energy, which in turn accounts for the enhanced OER activity. � 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Source Title: Advanced Science
ISSN: 21983844
DOI: 10.1002/advs.201901073
Rights: Attribution 4.0 International
Appears in Collections:Staff Publications

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