Electrocatalytic performances of N-doped graphene with anchored iridium species in oxygen reduction reaction. (25th September 2015)

• Record Type: Journal Article
• Authors: Choi, Kwangrok; Lee, Seungjun; Shim, Yeonjun; Oh, Junghoon; Kim, Sujin; Park, Sungjin
• Is Part Of: 2D materials. Volume 2:Number 3(2015)
• Publication Date: 2015-09-25
• Subjects: reduced graphene oxide -- iridium -- oxygen reduction reaction -- electrocatalysts; Graphene -- Periodicals; Materials science -- Periodicals; Nanostructured materials -- Periodicals; 620.115
• DOI: 10.1088/2053-1583/2/3/034019
• Languages: English
• ISSNs: 2053-1583

Abstract

Abstract: Development of new systems with high catalytic performances in the oxygen reduction reaction (ORR) for practical applications in fuel cells and metal–air batteries is a challenge. We develop a one-pot solution method for producing a novel hybrid material consisting of Ir species anchored on N-doped graphene. The hybrid is synthesized by reacting graphene oxide with IrCl3 · x H2 O in dimethylformamide under reflux. Chemical and structural analyses confirm the attachment of Ir atoms to the N and O atoms of the N-doped graphene-based materials. The hybrid shows a good electrocatalytic performance for the ORR in alkaline media, with an onset potential of 0.88 V (versus the reversible hydrogen electrode), high long-term durability, and good tolerance for methanol poisoning.