Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Synthesis and characterization of NiFe2O4 nanoparticle electrocatalyst for urea and water oxidation

요소 산화반응을 위한 NiFe2O4 나노파티클 촉매 합성 및 특성 분석

  • Ki-Yong Yoon (Department of Hydrogen Energy Materials, Korea Institute of Materials Science (KIMS)) ;
  • Kyung-Bok Lee (Department of Hydrogen Energy Materials, Korea Institute of Materials Science (KIMS)) ;
  • Dohyung Kim (Department of Hydrogen Energy Materials, Korea Institute of Materials Science (KIMS)) ;
  • Hee Yoon Roh (Department of Hydrogen Energy Materials, Korea Institute of Materials Science (KIMS)) ;
  • Sung Mook Choi (Department of Hydrogen Energy Materials, Korea Institute of Materials Science (KIMS)) ;
  • Ji-hoon Lee (Department of Hydrogen Energy Materials, Korea Institute of Materials Science (KIMS)) ;
  • Jaehoon Jeong (Department of Hydrogen Energy Materials, Korea Institute of Materials Science (KIMS)) ;
  • Juchan Yang (Department of Hydrogen Energy Materials, Korea Institute of Materials Science (KIMS))
  • 윤기용 (한국재료연구원 그린수소재료연구실) ;
  • 이경복 (한국재료연구원 그린수소재료연구실) ;
  • 김도형 (한국재료연구원 그린수소재료연구실) ;
  • 노희윤 (한국재료연구원 그린수소재료연구실) ;
  • 최승목 (한국재료연구원 그린수소재료연구실) ;
  • 이지훈 (한국재료연구원 그린수소재료연구실) ;
  • 정재훈 (한국재료연구원 그린수소재료연구실) ;
  • 양주찬 (한국재료연구원 그린수소재료연구실)
  • Received : 2023.06.23
  • Accepted : 2023.08.22
  • Published : 2023.08.31
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Abstract

Urea oxidation reaction (UOR) via electrochemical oxidation process can replace oxygen evolution reaction (OER) for green hydrogen production since UOR has lower thermodynamic potential (0.37 VRHE) than that of OER (1.23 VRHE). However, in the case of UOR, 6 electrons are required for the entire UOR. For this reason, the reaction rate is slower than OER, which requires 4 electrons. In addition, it is an important challenge to develop catalysts in which both oxidation reactions (UOR and OER) are active since the active sites of OER and UOR are opposite to each other. We prove that among the NiFe2O4 nanoparticles synthesized by the hydrothermal method at various synthesis temperatures, NiFe2O4 nanoparticle with properly controlled particle size and crystallinity can actively operate OER and UOR at the same time.

Keywords

Acknowledgement

본 성과물은 농촌진흥청 연구사업 (과제번호:PJ016253012021)의 지원을 받아 수행된 연구임.

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