과산화수소 분해반응을 이용한 Pt계 촉매의 인산피독 특성 평가 방법
The Analysis Method for Evaluation of Phosphoric Acid Poisioning of Pt Based Catalyst by Using Hydrogen Peroxide Decomposition Reaction
Phosphoric acid(인산), Platinum catalyst(백금촉매), Hydrogen peroxide(과산화수소), Ferroin indicator(페로인 지시약), PEMFC(고분자전해질연료전지)
JEONGJIN PARK1, SEUNGWON YANG1, YONGJIN CHUNG2,† YONGCHAI KWON1,†
In this study, the novel electrochemical and colorimetric analysis
methods are suggested to estimate the degree of phosphoric acid ion poisoning
on Pt based catalyst surface and to confirm the possibility of replacing the expensive
and long time consumed conventional methods. As the ways, the electrochemical
half cell tests such as cyclic voltammetry (CV) and linear sweep voltammetry
(LSV) are used and the change in chemical behavior by absorption of the
phosphoric acid ion on Pt based catalyst surface and hydrogen peroxide decomposition
reaction are successfully recognized by colorimetric measurements.
Conclusively, it is proved that the new methods show superior sensitivity for identifying
the degree of phosphoric acid poisoned on Pt based catalyst.