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Gold nanodendrities on graphene oxide nanosheets for oxygen reduction reaction
- Li, Xiao-Rong, Li, Xiang-Ling, Xu, Ming-Chen, Xu, Jing-Juan, Chen, Hong-Yuan
- Journal of materials chemistry A 2014 v.2 no.6 pp. 1697-1703
- ambient temperature, catalysts, catalytic activity, electrochemistry, fuel cells, graphene oxide, methanol, nanogold, nanosheets, reducing agents, surfactants
- Gold nanodendrites (AuNDs) monodispersed on graphene oxide (GO) nanosheets were successfully prepared using a clean synthesis method at room temperature and then applied for advanced oxygen reduction reaction (ORR). Herein, GO was used as the electron donors for reducing AuCl₄⁻ instead of any additional reductants and surfactants, leading to AuNDs with excellent monodispersity, uniformity and purity. The as-prepared AuNDs-loaded GO (AuNDs–GO) exhibit high electrocatalytic activity and a dominant four-electron pathway toward ORR. The AuNDs–GO also exhibit superior stability and methanol tolerance to a commercial Pt–C catalyst, making it a promising nanoelectrocatalyst in fuel cells and other electrochemical devices. This simple, straightforward, and general method is of significance for preparing high-performance metal nanocatalysts with a well-controlled morphology on appropriate supporting materials.