Print Email Facebook Twitter Selective surface functionalization generating site-isolated Ir on a MnO: X/N-doped carbon composite for robust electrocatalytic water oxidation Title Selective surface functionalization generating site-isolated Ir on a MnO: X/N-doped carbon composite for robust electrocatalytic water oxidation Author Yan, N. Detz, R.J. Govindarajan, N. Koelewijn, J.M. Hua, B. Li, P. Meijer, E.J. Reek, J.N.H. Publication year 2019 Abstract Water oxidation catalysis plays a pivotal role in the context of the worldwide interest for sustainable energy. Finding cost-effective and robust catalysts to replace the state-of-the-art noble metal materials is hence urgent. In this work, we develop a molecular iridium complex that selectively and uniformly anchors on the surface of manganese oxide which is interconnected with a nitrogen-doped carbon forming a nanorod material. In the subsequent pyrolysis step, isolated Ir atoms are created on the manganese oxide surface and they strongly interact with the adjacent Mn. Through physicochemical characterization and computational studies, we demonstrate that the incorporation of Ir single-atom species in the MnOx/N-C composite promotes the electrochemical water oxidation catalysis. The new material shows excellent activity in the oxygen evolution reaction in 0.1 M KOH with an overpotential of 250 mV at 10 mA cm-2. Importantly, compared to a sample conventionally prepared with H2IrCl6, the novel Ir-MnOx/N-C catalyst not only is more efficient, but also demonstrates improved redox stability without suffering from Ir leaching. Our approach opens up new opportunities for the rational design of site-isolated materials for catalysis in the field of energy applications. This journal is © The Royal Society of Chemistry. Subject Energy EfficiencyEnergy / Geological Survey NetherlandsCarbon carbon compositesCatalysisCatalystsCost effectivenessDoping (additives)Manganese oxideNanorodsOxidationOxidesPotassium hydroxidePrecious metals To reference this document use: http://resolver.tudelft.nl/uuid:e6540e71-277e-4d86-a3ad-2fcc86d5e284 DOI https://doi.org/10.1039/c9ta08447a TNO identifier 869729 Publisher Royal Society of Chemistry ISSN 2050-7488 Source Journal of Materials Chemistry A, 7 (40), 23098-23104 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.