Pt-M3/C(M=La, Sc, Y, Gd) Electrocatalysts for Oxygen Reduction Reaction
Pt-M3/C(M=La, Sc, Y, Gd) Electrocatalysts for Oxygen Reduction Reaction
Ravindranadh Koutavarapu(Physics Division, Department of Basic Sciences and Humanities, GMR Institute of Technology, Rajam 532127, India); 이태관(계명대학교 환경과학과); Shaik Gouse Peera(계명대학교 자연과학대학 자연과학연구소)
43권 2호, 111~117쪽
초록
Hydrogen fuel cells convert hydrogen efficiently and thus reduce climate change. However, the high cost of cathode catalysts, usually Pt nanoparticles supported on high-surface-area carbon (Pt/C), hinders commercial applications of fuel cells. Pt/C catalysts have the best cathodic oxygen reduction reaction (ORR) kinetics, but Pt with Co, Fe, and Ni has been allowed to reduce catalyst loading. Nevertheless, transition metal leaching in acidic/alkaline electrolytes is a major catalyst stability issue. As an alternative, alloying Pt with inner transition metals has proven effective. This study examined the effect of inner transition metals/rare earth metals such as Sc, Y, Gd, and La on Pt nanoparticle ORR activity. ORR was performed in 0.5 M H2SO4 and 0.1 M KOH electrolytes. The results showed that the Pt-Y catalyst had higher ORR activity than Pt/C in both acidic and alkaline electrolytes.
Abstract
Hydrogen fuel cells convert hydrogen efficiently and thus reduce climate change. However, the high cost of cathode catalysts, usually Pt nanoparticles supported on high-surface-area carbon (Pt/C), hinders commercial applications of fuel cells. Pt/C catalysts have the best cathodic oxygen reduction reaction (ORR) kinetics, but Pt with Co, Fe, and Ni has been allowed to reduce catalyst loading. Nevertheless, transition metal leaching in acidic/alkaline electrolytes is a major catalyst stability issue. As an alternative, alloying Pt with inner transition metals has proven effective. This study examined the effect of inner transition metals/rare earth metals such as Sc, Y, Gd, and La on Pt nanoparticle ORR activity. ORR was performed in 0.5 M H2SO4 and 0.1 M KOH electrolytes. The results showed that the Pt-Y catalyst had higher ORR activity than Pt/C in both acidic and alkaline electrolytes.
- 발행기관:
- 자연과학연구소
- 분류:
- 분야별통계