A layered hollow sphere architecture of iridium-decorated carbon electrode for oxygen evolution catalysis. (May 2017)

• Record Type: Journal Article
• Authors: Lee, Sang Ha; Lee, Hyuck; Cho, Misuk; Lee, Youngkwan
• Is Part Of: Carbon. Volume 115(2017)
• Page Start: 50
• Page End: 58
• Publication Date: 2017-05
• Subjects: Layered hollow sphere -- Graphene oxide -- Iridium -- Oxygen evolution -- Catalyst; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2016.12.088
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Here, we introduce a layered hollow sphere (LHS) architecture of iridium-decorated carbon electrode. The electrode was prepared by coating of a solution composed of graphene oxide (GO), IrCl3, and polystyrene bead followed by subsequent pyrolysis. The morphology of the electrode was investigated according to the composition of solution, and the electrocatalytic properties were characterized. The usage of GO highly enhanced the electrochemical surface area of the electrode (by ∼6 times). The LHS electrode also showed outstanding electrocatalytic properties: a current density of 89.99 mA/cm 2 could be obtained at a potential of 1.6 V. Graphical abstract: