A New Family of Perovskite Catalysts for Oxygen-Evolution Reaction in Alkaline Media: BaNiO3 and BaNi(0.83)O(2.5)

Establishment of a sustainable energy society has been strong driving force to develop cost-effective and highly active catalysts for energy conversion and storage devices such as metal-air batteries and electrochemical water splitting systems. This is because the oxygen evolution reaction (OER), a...

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Published in:Journal of the American Chemical Society 2016-03, Vol.138 (10), p.3541-3547
Main Authors: Lee, Jin Goo, Hwang, Jeemin, Hwang, Ho Jung, Jeon, Ok Sung, Jang, Jeongseok, Kwon, Ohchan, Lee, Yeayeon, Han, Byungchan, Shul, Yong-Gun
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container_issue 10
container_start_page 3541
container_title Journal of the American Chemical Society
container_volume 138
creator Lee, Jin Goo
Hwang, Jeemin
Hwang, Ho Jung
Jeon, Ok Sung
Jang, Jeongseok
Kwon, Ohchan
Lee, Yeayeon
Han, Byungchan
Shul, Yong-Gun
description Establishment of a sustainable energy society has been strong driving force to develop cost-effective and highly active catalysts for energy conversion and storage devices such as metal-air batteries and electrochemical water splitting systems. This is because the oxygen evolution reaction (OER), a vital reaction for the operation, is substantially sluggish even with precious metals-based catalysts. Here, we show for the first time that a hexagonal perovskite, BaNiO3, can be a highly functional catalyst for OER in alkaline media. We demonstrate that the BaNiO3 performs OER activity at least an order of magnitude higher than an IrO2 catalyst. Using integrated density functional theory calculations and experimental validations, we unveil that the underlying mechanism originates from structural transformation from BaNiO3 to BaNi(0.83)O(2.5) (Ba6Ni5O15) over the OER cycling process.
doi_str_mv 10.1021/jacs.6b00036
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title A New Family of Perovskite Catalysts for Oxygen-Evolution Reaction in Alkaline Media: BaNiO3 and BaNi(0.83)O(2.5)
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