Korean Chemical Engineering Research

  • 제57권5호
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  • Pages.701-705
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  • 2019
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  • 0304-128X(pISSN)
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  • 2233-9558(eISSN)
한국화학공학회 (The Korean Institute of Chemical Engineers)
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알칼라인 조건에서의 산소발생반응을 위한 N-doped NiO 촉매

Nitrogen-doped Nickel Oxide Catalysts for Oxygen-Evolution Reactions

  • 이진구 (세인트 앤드류 대학 화학과) ;
  • 전옥성 (연세대학교 화공생명공학과) ;
  • 설용건 (연세대학교 화공생명공학과)
  • Lee, Jin Goo (School of Chemistry, University of St Andrews) ;
  • Jeon, Ok Sung (Chemical and Biomolecular Engineering, Yonsei University) ;
  • Shul, Yong Gun (Chemical and Biomolecular Engineering, Yonsei University)
  • 투고 : 2019.01.28
  • 심사 : 2019.04.28
  • 발행 : 2019.10.01
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⟨ 이전 논문 다음 논문 ⟩

초록

알칼라인 조건에서의 산소발생 반응(oxygen-evolution reaction: OER)은 다양한 에너지 시스템에 중요한 반응으로 여겨지고 있다. 큰 overpotential을 감소시키기 위해 다양한 촉매들이 개발되고 있으며, 그 중 NiO는 높은 활성도에 대한 가능성으로 인해 연구가 활발하게 진행되고 있다. 촉매의 표면에서 OER에 대한 메커니즘은 정확하게 규명되지는 않았지만, 산화물 촉매에서 Ni 또는 O vacancy와 같은 결함들은 많은 전기화학반응에서 활성점으로 여겨진다. 따라서, 본 연구에서는 nitrogen을 ethylenediamine을 이용하여 NiO의 O위치에 치환하여 Ni vacancy를 형성하고 그로 인해서 OER의 activity와 내구성에 어떠한 영향을 미치는지에 대해 분석해 보았다.

Oxygen-evolution reaction (OER) in alkaline media has been considered as a key process for various energy applications. Many types of catalysts have been developed to reduce high overpotential in OER, such as metal alloys, metal oxides, perovskite, or spinel. Nickel oxide (NiO) has high potential to increase OER activity according to volcano plots. The exact mechanisms for OER has not been discovered, but defects such as cation or anion vacancy typically act as an active site for diverse electrochemical reactions. In this study, nitrogen was doped into NiO by using ethylenediamine for formation of Ni vacancy, and the effects of N doping on OER activity and stability was studied.

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