Synthesis and electrochemical analysis of Pt-loaded, polypyrroledecorated, graphene-composite electrodes

서지정보

· 발행기관 : 한국탄소학회
· 수록지 정보 : Carbon Letters / 14권 / 2호
· 저자명 : Jiyoung Park, Seok Kim

목차

1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions

초록

In this study, an electro-catalyst of Pt nanoparticles supported by polypyrrole-functionalized
graphene (Pt/PPy-reduced graphene oxide [RGO]) is reported. The Pt nanoparticles are deposited
on the PPy-RGO composite by chemical reduction of H2PtCl6 using NaBH4. The
presence of graphene (RGO) caused higher activity. This might have been due to increased
electro-chemically accessible surface areas, increased electronic conductivity, and easier
charge-transfer at polymer-electrolyte interfaces, allowing higher dispersion and utilization
of the deposited Pt nano-particles. Microstructure, morphology and crystallinity of the
synthesized materials were investigated using X-ray diffraction and transmission electron
microscopy. The results showed successful deposition of Pt nano-particles, with crystallite
size of about 2.7 nm, on the PPy-RGO support film. Catalytic activity for methanol electrooxidation in fuel cells was investigated using cyclic voltammetry. The fundamental electrochemical test results indicated that the electro-catalytic activity, for methanol oxidation, of the Pt/PPy-RGO combination was much better than for commercial catalyst.

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