Enhanced Activity and Stability of Pt catalysts on Functionalized Graphene Sheets for Electrocatalytic Oxygen Reduction

Journal Article · Thu Apr 30 04:00:00 EDT 2009 · Electrochemistry Communications, 11(5):954-957

DOI:https://doi.org/10.1016/j.elecom.2009.02.033· OSTI ID:952899

Kou, Rong; Shao, Yuyan; Wang, Donghai; Engelhard, Mark H; Kwak, Ja Hun; Wang, Jun; Viswanathan, Vilayanur V; Wang, Chong M; Lin, Yuehe; Wang, Yong; Aksay, Ilhan A; Liu, Jun

Electrocatalysis of oxygen reduction using Pt nanoparticles supported on functionalized graphene sheets (FGSs) was studied. FGSs were prepared by thermal expansion of graphite oxide. Pt nanoparticles with average diameter of 2 nm were uniformly loaded on FGSs by impregnation methods. Pt-FGS showed a higher electrochemical surface area and oxygen reduction activity with improved stability as compared with commercial catalyst. Transmission electron microscopy, X-ray photoelectron spectroscopy, and electrochemical characterization suggest that the improved performance of Pt-FGS can be attributed to smaller particle size and less aggregation of Pt nanoparticles on the functionalized graphene sheets.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 952899
• Report Number(s): PNNL-SA-64809; 24990; EB4209000
• Journal Information: Electrochemistry Communications, 11(5):954-957, Journal Name: Electrochemistry Communications, 11(5):954-957
• Country of Publication: United States
• Language: English

Related Subjects

Environmental Molecular Sciences Laboratory
Functionalized graphene sheets
Pt
durability
fuel cell
oxygen reduction