Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Characterizations of Pt-SPE Electrocatalysts Prepared by an Impregnation-Reduction Method for Water Electrolysis

함침-환원법으로 제조된 수전해용 Pt-SPE 전극촉매의 특성

  • Jang, Doo-Young (Department of Chemical Engineering, Myongji University) ;
  • Jang, In-Young (Department of Chemical Engineering, Myongji University) ;
  • Kweon, Oh-Hwan (Department of Chemical Engineering, Myongji University) ;
  • Kim, Kyoung-Eon (Department of Chemical Engineering, Myongji University) ;
  • Hwang, Gab-Jin (Hydrogen Energy Research Center, Korea Institute of Energy Research) ;
  • Kang, An-Soo (Department of Chemical Engineering, Myongji University)
  • 장두영 (명지대학교 화학공학과) ;
  • 장인영 (명지대학교 화학공학과) ;
  • 권오환 (명지대학교 화학공학과) ;
  • 김경언 (명지대학교 화학공학과) ;
  • 황갑진 (한국에너지기술연구원 수소에너지 연구센터) ;
  • 강안수 (명지대학교 화학공학과)
  • Published : 2006.12.15
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Abstract

Solid polymer electrolyte(SPE) membrane with electrodes embedded on both faces offer unique possibilities for the electrochemical cells like water electrolyzer with fuel cell. The Nafion 117 membrane was used as the SPE, and $Pt(NH_3)_4Cl_2$ and $NaBH_4$ as the electrocatalysts and reducing agent, respectively. The 'impregnation-reduction(I-R) method' has been investigated as a tool for the preparation of electrocatalysts for water electrolyzer by varying the concentration of reducing agent and reduction time at fixed concentration of platinum salt, 5 mmol/L. Pt-SPE electrocatalysts prepared by non-equilibrium I-R method showed the lowest cell voltage of 2.17 V at reduction time, 90 min and with concentration of reducing agent 0.8 mol/L and the cell voltage with those by equilibrium I-R method was 2.42 V at reduction time, 60 min and with concentration of reducing agent 0.8 mol/L. The cell voltage were obtained at a current density $1\;A/cm^2$ and $80^{\circ}C$. In water electrolysis, hydrogen production efficiency by Pt-SPE electrocatalyst is 68.2% in case of non-equilibrium I-R method and 61.2% at equilibrium I-R method.

Keywords

References

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