화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.26, 265-269, June, 2015
DOI10.1016/j.jiec.2014.12.002  Export Citation
Preparation and electrocatalytic oxidation performance of Pt/MnO2-graphene oxide nanocomposites
Qizhong Sun, Soo-Jin Park1, and Seok Kim†
  • School of Chemical and Biochemical Engineering, Pusan National University, 2, Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan 609-735, South Korea
  • 1Dept of Chemistry, Inha University, 100, Inha-ro, Nam-gu, Incheon 402-751, South Korea
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A simple and eco-friendly approach was developed to prepare manganese dioxide functionalized reduced graphene oxide supported Pt nanocomposites (Pt/MnO2-RGO) via chemical reduction process. The morphology and structure of as-prepared catalysts were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectra (FT-IR) and X-ray diffraction (XRD). Subsequently, electrochemical properties of catalysts were systematically investigated by cyclic voltammetry (CV). As a result, the ultrafine Pt nanoparticles with an average diameter of 2.9 nm were uniformly dispersed on the MnO2-RGO surface. The Pt/MnO2-RGO catalysts exhibited the superior electrochemical active surface area (79.4 m2 g-1) and specific peak current density for methanol oxidation (24.7 mA cm-2), compared to Pt/reduced graphene oxide (Pt/RGO) and Pt/carbon black (Pt/CB). The improved electrocatalytic activity was mainly attributed to the better dispersion of Pt nanoparticles as well as the synergistic effect of the modified supports.
Keywords:Graphene;Manganese dioxide;Pt nanoparticles;Methanol oxidation;Electrochemical property
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