Enhanced Bifunctional Oxygen Catalysis in Strained LaNiO3 Perovskites
Abstract
Strain is known to greatly influence low-temperature oxygen electrocatalysis on noble metal films, leading to significant enhancements in bifunctional activity essential for fuel cells and metal-air batteries. Still, its catalytic impact on transition-metal oxide thin films, such as perovskites, is not widely understood. Here, we epitaxially strain the conducting perovskite LaNiO3 to systematically determine its influence on both the oxygen reduction and oxygen evolution reaction. Uniquely, we found that compressive strain could significantly enhance both reactions, yielding a bifunctional catalyst that surpasses the performance of noble metals such as Pt. We attribute the improved bifunctionality to strain-induced splitting of the eg orbitals, which can customize orbital asymmetry at the surface. Lastly, analogous to strain-induced shifts in the d-band center of noble metals relative to the Fermi level, such splitting can dramatically affect catalytic activity in this perovskite and other potentially more active oxides.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1247935
- Grant/Contract Number:
- AC05-00OR22725; AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the American Chemical Society
- Additional Journal Information:
- Journal Volume: 138; Journal Issue: 8; Journal ID: ISSN 0002-7863
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Petrie, Jonathan R., Cooper, Valentino R., Freeland, John W., Meyer, Tricia L., Zhang, Zhiyong, Lutterman, Daniel A., and Lee, Ho Nyung. Enhanced Bifunctional Oxygen Catalysis in Strained LaNiO3 Perovskites. United States: N. p., 2016.
Web. doi:10.1021/jacs.5b11713.
Petrie, Jonathan R., Cooper, Valentino R., Freeland, John W., Meyer, Tricia L., Zhang, Zhiyong, Lutterman, Daniel A., & Lee, Ho Nyung. Enhanced Bifunctional Oxygen Catalysis in Strained LaNiO3 Perovskites. United States. https://doi.org/10.1021/jacs.5b11713
Petrie, Jonathan R., Cooper, Valentino R., Freeland, John W., Meyer, Tricia L., Zhang, Zhiyong, Lutterman, Daniel A., and Lee, Ho Nyung. Thu .
"Enhanced Bifunctional Oxygen Catalysis in Strained LaNiO3 Perovskites". United States. https://doi.org/10.1021/jacs.5b11713. https://www.osti.gov/servlets/purl/1247935.
@article{osti_1247935,
title = {Enhanced Bifunctional Oxygen Catalysis in Strained LaNiO3 Perovskites},
author = {Petrie, Jonathan R. and Cooper, Valentino R. and Freeland, John W. and Meyer, Tricia L. and Zhang, Zhiyong and Lutterman, Daniel A. and Lee, Ho Nyung},
abstractNote = {Strain is known to greatly influence low-temperature oxygen electrocatalysis on noble metal films, leading to significant enhancements in bifunctional activity essential for fuel cells and metal-air batteries. Still, its catalytic impact on transition-metal oxide thin films, such as perovskites, is not widely understood. Here, we epitaxially strain the conducting perovskite LaNiO3 to systematically determine its influence on both the oxygen reduction and oxygen evolution reaction. Uniquely, we found that compressive strain could significantly enhance both reactions, yielding a bifunctional catalyst that surpasses the performance of noble metals such as Pt. We attribute the improved bifunctionality to strain-induced splitting of the eg orbitals, which can customize orbital asymmetry at the surface. Lastly, analogous to strain-induced shifts in the d-band center of noble metals relative to the Fermi level, such splitting can dramatically affect catalytic activity in this perovskite and other potentially more active oxides.},
doi = {10.1021/jacs.5b11713},
journal = {Journal of the American Chemical Society},
number = 8,
volume = 138,
place = {United States},
year = {Thu Feb 11 00:00:00 EST 2016},
month = {Thu Feb 11 00:00:00 EST 2016}
}
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Recent Advances in Oxygen Electrocatalysts Based on Perovskite Oxides
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