A New Family of Perovskite Catalysts for Oxygen-Evolution Reaction in Alkaline Media: BaNiO3 and BaNi0.83O2.5

Jin Goo Lee, Jeemin Hwang, Ho Jung Hwang, Ok Sung Jeon, Jeongseok Jang, Ohchan Kwon, Yeayeon Lee, Byungchan Han, Yong Gun Shul

Research output: Contribution to journalArticle

111 Citations (Scopus)

Abstract

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 BaNi0.83O2.5 (Ba6Ni5O15) over the OER cycling process.

Original languageEnglish
Pages (from-to)3541-3547
Number of pages7
JournalJournal of the American Chemical Society
Volume138
Issue number10
DOIs
Publication statusPublished - 2016 Mar 16

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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