title: Fe3O4@NiFexOyNanoparticles with Enhanced Electrocatalytic Properties for Oxygen Evolution in Carbonate Electrolyte.
abstract: The design and engineering of earth-abundant catalysts that are both cost-effective and highly active for water splitting are crucial challenges in a number of energy conversion and storage technologies. In this direction, herein we report the synthesis of Fe3O4@NiFexOycore-shell nanoheterostructures and the characterization of their electrocatalytic performance toward the oxygen evolution reaction (OER). Such nanoparticles (NPs) were produced by a two-step synthesis procedure involving the colloidal synthesis of Fe3O4nanocubes with a defective shell and the posterior diffusion of nickel cations within this defective shell. Fe3O4@NiFexOyNPs were subsequently spin-coated over ITO-covered glass and their electrocatalytic activity toward water oxidation in carbonate electrolyte was characterized. Fe3O4@NiFexOycatalysts reached current densities above 1 mA/cm2with a 410 mV overpotential and Tafel slopes of 48 mV/dec, which is among the best electrocatalytic performances reported in carbonate electrolyte.
authors.affiliation: Catalonia Institute for Energy Research - IREC , Sant Adrià de Besòs, Barcelona 08930, Spain.
authors.forename: Zhishan
authors.initials: Z
authors.lastname: Luo
authors.affiliation: Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology (BIST), Campus UAB , Bellaterra, 08193 Barcelona, Spain.
authors.forename: Sara
authors.initials: S
authors.lastname: Martí-Sànchez
authors.affiliation: Catalonia Institute for Energy Research - IREC , Sant Adrià de Besòs, Barcelona 08930, Spain.
authors.forename: Raquel
authors.initials: R
authors.lastname: Nafria
authors.affiliation: Catalonia Institute for Energy Research - IREC , Sant Adrià de Besòs, Barcelona 08930, Spain.
authors.forename: Gihan
authors.initials: G
authors.lastname: Joshua
authors.affiliation: Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology (BIST), Campus UAB , Bellaterra, 08193 Barcelona, Spain.
authors.forename: Maria
authors.initials: M
authors.lastname: de la Mata
authors.affiliation: Catalonia Institute for Energy Research - IREC , Sant Adrià de Besòs, Barcelona 08930, Spain.|Centre de Tecnologia Química de Catalunya and Universitat Rovira i Virgili , Carrer de Marcel·lí Domingo s/n, 43007 Tarragona, Spain.
authors.forename: Pablo
authors.initials: P
authors.lastname: Guardia
authors.affiliation: Catalonia Institute for Energy Research - IREC , Sant Adrià de Besòs, Barcelona 08930, Spain.
authors.forename: Cristina
authors.initials: C
authors.lastname: Flox
authors.affiliation: Freelancer , Santiago de Compostela 15701, Spain.
authors.forename: Carlos
authors.initials: C
authors.lastname: Martínez-Boubeta
authors.affiliation: Department of Physics, Aristotle University Thessaloniki , 54124 Thessaloniki, Greece.
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Simeonidis
authors.affiliation: Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya , 08028 Barcelona, Spain.
authors.forename: Jordi
authors.initials: J
authors.lastname: Llorca
authors.affiliation: Catalonia Institute for Energy Research - IREC , Sant Adrià de Besòs, Barcelona 08930, Spain.
authors.forename: Joan Ramon
authors.initials: JR
authors.lastname: Morante
authors.affiliation: Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology (BIST), Campus UAB , Bellaterra, 08193 Barcelona, Spain.|ICREA , Pg. Lluís Companys 23, 08010 Barcelona, Spain.
authors.forename: Jordi
authors.initials: J
authors.lastname: Arbiol
authors.affiliation: Catalonia Institute for Energy Research - IREC , Sant Adrià de Besòs, Barcelona 08930, Spain.
authors.forename: Maria
authors.initials: M
authors.lastname: Ibáñez
authors.affiliation: Catalonia Institute for Energy Research - IREC , Sant Adrià de Besòs, Barcelona 08930, Spain.|ICREA , Pg. Lluís Companys 23, 08010 Barcelona, Spain.
authors.forename: Andreu
authors.initials: A
authors.lastname: Cabot
keywords: OER; core−shell nanostructure; electrocatalysts; iron oxide; magnetite; nanoparticle; oxygen evolution reaction