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Comparison of the Characteristics of Pd-Ir-Y Ternary Alloy Catalyst Particles and Oxygen Reduction Activity According to Yttrium Contents

이트륨 함량에 따른 Pd-Ir-Y 3원계 합금 촉매 입자의 특성과 산소 환원 반응의 활성 비교

  • KIM, DO HYUNG (Graduate Program of Energy Technology, School of Integrated Technology, Institute of Integrated Technology, Gwangju Institute of Science and Technology) ;
  • LEE, EUNAE (Graduate Program of Energy Technology, School of Integrated Technology, Institute of Integrated Technology, Gwangju Institute of Science and Technology) ;
  • PAK, CHANHO (Graduate Program of Energy Technology, School of Integrated Technology, Institute of Integrated Technology, Gwangju Institute of Science and Technology)
  • 김도형 (광주과학기술원 융합기술원 융합기술학제학부 에너지프로그램) ;
  • 이은애 (광주과학기술원 융합기술원 융합기술학제학부 에너지프로그램) ;
  • 박찬호 (광주과학기술원 융합기술원 융합기술학제학부 에너지프로그램)
  • Received : 2018.05.29
  • Accepted : 2018.06.30
  • Published : 2018.06.30

Abstract

To enhance catalyst activity of the palladium (Pd) towards oxygen reduction reaction (ORR), iridium (Ir) and yttrium (Y) were alloyed by polyol method. Due to the low reduction potential of Y, it is hard to reduce Y ion completely by polyol method. In XPS spectra, the binding energy of the Pd is shifted to a lower value, which indicates the d-electron of Pd is filled by the electron from the Y. And other phases of Y are observed by the XPS. Among the catalysts, the $Pd_4IrY_{0.1}/C$ showed the best activity towards ORR, which indicates the metallic Y is effective for improving the catalytic activity. Thus, for further enhancing ORR activity, the novel method for complete reduction of Y is needed.

Keywords

References

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