Facile synthesis of carbon-supported, ultrasmall ruthenium oxide nanocrystals for supercapacitor electrode materials

다국어 초록 (Multilingual Abstract)

This Letter describes a simple, aqueous-phase route to the synthesis of ultrasmall ruthenium oxide (RuO<SUB>2</SUB>) nanocrystals with sizes less than 2nm. These ultrasmall RuO<SUB>2</SUB> nanocrystals can be synthesized simply by heating an aqueous solution containing RuCl<SUB>3</SUB> in the presence of Vulcan carbon powders as supports. As a result of exceptionally small particle sizes, the carbon-supported RuO<SUB>2</SUB> nanocrystals exhibited a specific capacitance as high as 517.8F/g based on the mass of RuO<SUB>2</SUB>. Our approach provides a simple, environmentally benign, and readily scalable route to the synthesis of RuO<SUB>2</SUB> nanocrystals that are promising candidates as electrode materials for high-performance supercapacitors.