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권성상,김석 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
In this study, the electrochemical analysis of Platinum (Pt) supported thiol-attached reduced graphene oxide (t-rGO) was investigated. The functional groups of GO were substituted for thiol (SH), which result from strong nucleophilic substitution reaction. The Sulfur(S) that has high affinity to metal combines with Pt by strong covalent bond. In conclusion, The Pt-t-GO was synthesized and showed that the Pt-t-rGO is better than Pt/rGO in terms of electrocatalytic activity. Also, the electrocatalytic activity was different according to the various weight ratios of thiol. The remarkable property of Pt-t-rGO was demonstrated by CV, FE-SEM, TEM, FT-IR, XPS and XRD.
권성상,김석 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
In this study, the electrochemical analysis of Platinum (Pt) and single-walled carbon nanotube (SWCNT) supported on reduced graphene oxide (rGO) was investigated. Graphene oxide (GO) was prepared from graphite using modified hummer's method and the Pt/SWCNT/rGO composite was simultaneously synthesized with GO, SWCNT and Pt by chemical reduction method in ethylene glycol (EG). In order to prevent GO from aggregation, the SWCNT existed as functioned spacers between graphene oxide sheets. The result of Pt/SWCNT/rGO indicated that it improved catalytic activity. Electrochemical properties of the composite were characterized by cyclic voltammetry (CV). The morphology and structure of the composite was examined by field emission scanning electron microscopy (FE-SEM), transmission electron microscope (TEM). The functional groups of the composite were further confirmed by fourier transform spectral analysis (FT-IR).
권성상,김석 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
In this study, we present the enhanced Pt/SWCNT/RGO composite electrode by inserting SWCNTs between RGO sheets for a methanol oxidation. The Pt/RGO composite were compared with Pt/SWCNT/RGO with various weight ratios of SWCNTs. The SWCNTs act as functioned spacers which inhibit aggregation of RGO sheets as well as smooth migration of ion by making ideal spacer. The enhanced Pt/SWCNT/RGO composite electrode was demonstrated by cyclic voltammetry (CV), chronoamperometry (CA), field emission scanning electron microscopy (FE-SEM), transmission electron microscope (TEM) and fourier transform infrared spectroscopy (FT-IR).
권성상,김석 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
In this study, we have presented an facility method for the synthesis of nitrogen-doped reduced graphene oxide supported Pt nanocomposites (Pt/N-RGO). Nitrogen doped graphene (N-RGO) was prepared by pyrolysis of graphene oxide with cyanamide as nitrogen source. Then, the Pt nanoparticles were deposited over nitrogen-doped RGO by one-step chemical polyol reduction process. The morphology and structure of as-prepared catalysts were characterized by SEM, TEM, XRD and FT-IR. Subsequently, electrocatalytic activities of the catalysts were evaluated by cyclic voltammetry (CV).
권성상,김석 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
In this work, the Electrochemical analysis of platinum (Pt) supported on single-walled carbon nanotubes (SWCNT) and reduced graphene oxide (RGO) was investigated. The Pt/SWCNT/RGO composite compared with Pt/RGO as well as various weight ratios of SWCNT. The SWCNT between graphene oxide sheets can serve as functioned spacers which impede aggregation of GO. The morphology and structure of the composite indicated that the Pt nanopaticles were deposited on the RGO, SWCNT and the SWCNTs were dispersed between RGO sheets by FE-SEM, TEM and XRD. Electrochemical properties of the composite were characterized by CV. The functional groups of the composite were further confirmed by FT-IR.