Journal
ADVANCED SCIENCE
Volume 6, Issue 19, Pages -Publisher
WILEY
DOI: 10.1002/advs.201901073
Keywords
hole doping; hybridization; LaNiO3; nickelates; oxygen evolution reaction
Categories
Funding
- U.S. Department of Energy (DOE), Office of Science, Early Career Research Program [68272]
- U.S. DOE, Office of Science, Office of Basic Energy Sciences
- Division of Materials Sciences and Engineering [10122]
- Linus Pauling Distinguished Postdoctoral Fellowship at the Pacific Northwest National Laboratory (PNNL) [LDRD69319]
- China Scholarship Council (CSC)
- DOE Office of Science by Argonne National Laboratory [DE-AC02-06CH11357]
- FRS-FNRS [2.5020.1]
- Office of Biological and Environmental Research
Ask authors/readers for more resources
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-delta. 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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available