| Summary: | 碩士 === 國立雲林科技大學 === 材料科技研究所 === 103 === In this study, we synthesized Pt-MoS2/Graphene by three-step synthesis. First, we used graphite powder to prepared grapheme oxide by modified Hummer’s and Offeman’s method. Then, we started three-step synthesis.
First step, we prepared grapheme that used sodium tetrahydridoborate(NaBH4) to reduce grapheme oxide(GO). Second step, sodium molybdate(NaMoO4‧H2O) and thiourea(CH4N2S) mixed by water as precursors for MoS2, MoS2/Graphene composites were prepared at 210℃ for 24 hours by hydrothermal synthesis. Final, we prepared Pt-MoS2/Graphene composites by refluxing method that used ethylene glycol(C2H6O2) as reducing agent to reduced Pt nanoparticles. To explore different amount of MoS2(parameters A ~ D) for Pt-MoS2/Graphene for electrochemical analysis.
The results showed that the Pt-MoS2/Graphene for parameter D(NaMoO4‧H2O 10 mg and CH4N2S 20 mg) is the best parameter with high electrochemically active surface area(380 m2/g), high electrocatalytic current(24.993 mA) at -0.44V for SHE, and low electrochemical impedance(4.518 Ω).
Keyword : Graphene, hydrogen evolution, MoS2, Pt, electrochemical impedance
|
|---|
