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A Study on Oxygen Reduction Reaction of PtM Electrocatalysts Synthesized on Graphene for Proton Exchange Membrane Fuel Cell

고분자전해질연료전지를 위한 그래핀 기반 PtM 촉매들의 산소환원반응성 연구

  • Yang, Jongwon (Grad. School of Energy and Environment, Seoul National University of Science and Technology) ;
  • Choi, Changkun (Grad. School of Energy and Environment, Seoul National University of Science and Technology) ;
  • Joh, Han-Ik (Korea Institute of Science and Technology (KIST), Carbon Convergence Materials Research Center) ;
  • Park, Jong Jin (KOLON tower annex) ;
  • Kwon, Yongchai (Grad. School of Energy and Environment, Seoul National University of Science and Technology)
  • 양종원 (서울과학기술대학교 에너지환경대학원) ;
  • 최장군 (서울과학기술대학교 에너지환경대학원) ;
  • 조한익 (한국과학기술연구원) ;
  • 박종진 (코오롱환경서비스) ;
  • 권용재 (서울과학기술대학교 에너지환경대학원)
  • Received : 2014.07.17
  • Accepted : 2014.08.31
  • Published : 2014.08.30

Abstract

In this research, we investigate electrical performance and electrochemical properties of graphene supported Pt (Pt/G) and PtM (M = Ni and Y) alloy catalysts (PtM/Gs) that are synthesized by modified polyol method. With the PtM/Gs that are adopted for oxygen reduction reaction (ORR) as cathode of proton exchange membrane fuel cells (PEMFCs), their catalytic activity and ORR performance and electrical performance are estimated and compared with one another. Their particle size, particle distribution and electrochemically active surface (EAS) area are measured by TEM and cyclic voltammetry (CV), respectively. On the other hand, regarding ORR activity and electrical performance of the catalysts, (i) linear sweeping voltammetry by rotating disk electrode and rotating ring-disk electrode and (ii) PEMFC single cell tests are used. The TEM and CV measurements demonstrate particle size and EAS of PtM/Gs are compatible with those of Pt/G. In case of PtNi/G, its half-wave potential, kinetic current density, transferred electron number per oxygen molecule and $H_2O_2$ production % are excellent. Based on data obtained by half-cell test, when PEMFC singlecell tests are carried out, current density measured at 0.6V and maximum power density of the PEMFC single cell employing PtNi/G are better than those employing Pt/G. Conclusively, PtNi/Gs synthesized by modified polyol shows better ORR catalytic activity and PEMFC performance than other catalysts.

Keywords

References

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