Ag nanorods-reduced graphene oxide (Ag-rGO) hybrid nanostructures, as an alternative oxygen reduction catalyst to Pt-based materials, have been prepared through a co-reductive method. The electrochemical performance reveal that both the on-set potentials and the limiting diffusion current densities of Ag-rGO samples are comparable to those of commercial Pt/C catalyst, implying that such hybrid nanostructures could be employed in alkaline fuel cells. Both contrast experimental characterizations and energy level analysis indicate that the enhanced oxygen reduction activity of Ag-rGO hybrid nanostructures can be attributed to the strong coupling between Ag nanorods and rGO sheets.

中文翻译：

---

Ag纳米棒-rGO杂化物的偶联增强的氧还原反应活性

已经通过共还原方法制备了Ag纳米棒还原的氧化石墨烯（Ag-rGO）杂化纳米结构，作为Pt基材料的替代氧还原催化剂。电化学性能表明，Ag-rGO样品的起始电势和极限扩散电流密度均与商用Pt / C催化剂相当，这表明此类杂化纳米结构可用于碱性燃料电池。对比实验表征和能级分析均表明，Ag-rGO杂化纳米结构的增强的氧还原活性可归因于Ag纳米棒与rGO片之间的强耦合。