121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-346
Subject Enhanced-catalytic activity and stability of Pt nanoparticles supported on triazine-functionalized graphene nanoplatelets in oxygen and iodine reduction reactions
Authors In-Yup Jeon
School of Energy and Chemical Engineering, Wonkwang University, Korea
Abstract Platinum (Pt)-supported triazine-functionalized graphene nanoplatelets (Pt/TfGnP) is prepared simply from carboxylic acid-functionalized graphene nanoplatelets (CGnP) made by the mechano-chemical reaction technique. The resultant Pt/TfGnP exhibits outstanding catalytic activities with much better electrochemical stability compared with the commercial Pt/C catalysts in oxygen reduction reaction (ORR) for fuel cells (FCs) and Pt nanoparticle film in iodine reduction reaction (IRR) for dye-sensitized solar cells (DSSCs). For ORR, onset and half-wave potentials of Pt/TfGnP exhibit more positive values at 0.58 and 0.53 V than those of the commercial Pt/C catalysts (0.57 and 0.52 V) under acidic condition, respectively. In addition, for IRR, the charge transfer resistance (Rct) at the CE/electrolyte interface is reduced to 0.13 Ω cm2, much lower than that of Pt nanoparticles (0.52 Ω cm2). More importantly, Pt/TfGnP shows profound improvements in the electrochemical stability for both ORR and IRR compared to the commercial Pt/C catalysts and Pt nanoparticle film. Such extraordinary high ORR and IRR activities and electrochemical stability of Pt/TfGnP are attributed to the triazine structure in TfGnP and high surface area of TfGnP (963.0 m2 g1). A number of advantages of Pt/TfGnP like as the outstanding electrocatalytic activity, an unusual electrochemical stability, simply making process and low Pt content, demonstrate that this is a promising alternative to Pt catalysts or electrodes for FCs and DSSCs.
E-mail iyjeon79@wku.ac.kr