DataVXChemistry of MaterialsPaper
journal article·2020-04-28Open access

First Example of Protonation of Ruddlesden–Popper Sr2IrO4: A Route to Enhanced Water Oxidation Catalysts

Ronghuang Zhang, Paul E. Pearce, Vanessa Pimenta, Jordi Cabana, Heifang Li, Daniel Alves Dalla Corte, Artem M. Abakumov, Gwenaëlle Rousse, Domitille Giaume, Michael Deschamps, Alexis Grimaud

Chemistry of Materials· Volume 32· Issue 8
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Abstract

Water electrolysis is considered to be a promising way to store and convert excess renewable energies into hydrogen, which is of high value for many chemical transformation processes such as the Haber-Bosch process. The main challenge to promote the deployment of the polymer electrolyte membrane water electrolysis (PEMWE) technology lies in the design of robust catalysts for the oxygen evolution reaction (OER) under acidic conditions, since most of the transition metal-based oxides undergo structural degradation under these harsh acidic conditions. To broaden the variety of candidate materials as OER catalysts, a cation-exchange synthetic route was recently explored to reach crystalline pronated iridates with unique structural properties and stability. In this work, a new protonated phase H3.6IrO4·3.7H2O, prepared via Sr2+/H+ cation exchange at room temperature starting from the parent Ruddlesden–Popper Sr2IrO4 phase, is described. This is the first discovery of crystalline protonated iridate forming from a perovskite-like phase, adopting a layered structure with apex-linked IrO6 octahedra. Furthermore, H3.6IrO4·3.7H2O is found to possess not only an enhanced specific catalytic activity, superior to that of other perovskite-based iridates, but also a mass activity comparable to that of nanosized IrOx particles, while showing an improved catalytic stability owing to its ability to reversibly exchange protons in acid.
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Research context

Energy storagePolymersNanomaterialsElectronic materialsCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced Photocatalysis Techniques · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Chimie du Solide et de l’Energie, UMR 8260, Collège de France, 75231 Cedex 05 Paris, France

Réseau sur le Stockage Electrochimique de l’Energie (RS2E), CNRS FR 3459, 33 rue Saint Leu, F-75005 80039 Cedex, Amiens, France

Sorbonne Université, Paris, France

Institut des Matériaux Poreux de Paris, UMR 8004 CNRS, Ecole Normale Supérieure, Ecole Supérieure de Chimie et de Physique Industrielle de Paris, PSL University, F-75005 Paris, France

Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States

Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, United States

Joint Center for Energy Storage Research (JCESR), Argonne National Laboratory, Lemont, Illinois 60439, United States

Skoltech Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Moscow 143026, Russia

Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France

CNRS, CEMHTI UPR3079, Université d’Orléans, 1D avenue de la recherche scientifique, 45071 Cedex 2 Orléans, France

ALISTORE-European Research Institute, FR CNRS 3104, 80039 Amiens, France

Funding

Agence Nationale de la Recherche · Division of Materials Research

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