| 학회 |
한국고분자학회 |
| 학술대회 |
2012년 봄 (04/12 ~ 04/13, 대전컨벤션센터) |
| 권호 |
37권 1호 |
| 발표분야 |
고분자가공/복합재료 |
| 제목 |
Electrocatalytic Activities of Platinum Nanoaprticles on Graphene Sheets for Fuel Cell Applications |
| 초록 |
The electrocatalysis of the oxygen reduction reaction (ORR) on graphene supported nanosized Pt electrocatalysts was studied in 0.1 M KOH by cyclic voltammetry and rotating disk electrode system. The onset potential for oxygen reduction at Pt/graphene was shifted to lower potentials and showed improved specific activity towards the ORR compared with 4-mercaptobenzoyl functionalized graphene catalysts. Although loading weight of Pt onto graphene sheet was 7.2 wt%, the catalytic activity of Pt/graphene catalyst is similar with commercial Pt/C catalyst (20 wt% Pt). The morphologies of the resultant composites were studied by TEM and SEM. After the accelerated degradation test (100 cycles of -1 V to 0.2 V), the average Pt particle size in a graphene supported catalyst remained 3nm. The unique structure of graphene improved electrode durability by strengthening the interaction between the Pt particles and the graphene support. |
| 저자 |
최현정, 백종범
|
| 소속 |
울산과학기술대 |
| 키워드 |
Graphene; Platinum nanoparticle; Fuel cell; Catalyst
|
| E-Mail |
|
