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Upscaling high activity oxygen evolution catalysts based on CoFe2O4 nanoparticles supported on nickel foam for power-to-gas electrochemical conversion with energy efficiencies above 80%
Urbain, Félix (Institut de Recerca en Energia de Catalunya)
Du, Ruifeng (Institut de Recerca en Energia de Catalunya)
Tang, PengYi (Institut Català de Nanociència i Nanotecnologia)
Smirnov, Vladimir (Forschungszentrum Jülich)
Andreu, Teresa (Institut de Recerca en Energia de Catalunya)
Finger, Friedhelm (Forschungszentrum Jülich)
Jiménez Divins, Nuria (Universitat Politècnica de Catalunya. Departament d'Enginyeria Química)
Llorca, Jordi (Universitat Politècnica de Catalunya. Departament d'Enginyeria Química)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Cabot, Andreu (Institut de Recerca en Energia de Catalunya)
Morante, Joan Ramon (Institut de Recerca en Energia de Catalunya)

Date: 2019
Abstract: We investigate cobalt ferrite nanoparticles (NPs) supported on large-scale electrodes as oxygen evolution reaction (OER) catalysts. Colloidal CoFeO NPs were loaded on low-cost and high surface area nickel foam (NF) scaffolds. The coating process was optimized for large electrode areas, ensuring a proper distribution of the NPs on the NF that allowed overcoming the electrical conductivity limitations of oxide NPs. We were able to produce CoFeO-coated NFs having 10 cm geometric surface areas with overpotentials below 300 mV for the OER at a current density of 50 mA/cm. Such impressively low overpotentials suggested using CoFeO NP-based electrodes within a water electrolysis device. In this prototype device, stable operating currents up to 500 mA at remarkably low cell-voltages of 1. 62 and 1. 53 V, at ambient and 50 °C electrolyte temperatures, respectively, were reached during operation periods of up to 50 h. The high electrochemical energy efficiencies reached at 50 mA/cm, 75% and 81% respectively, rendered these devices particularly appealing to be combined with low-cost photovoltaic systems for bias-free hydrogen production. Therefore, CoFeO NP-based electrolysers were coupled to low-cost thin-film silicon solar cells with 13% efficiency to complete a system that afforded solar-to-fuel efficiencies above 10%.
Note: Número d'acord de subvenció AGAUR/2017/SGR-1246
Note: Número d'acord de subvenció AGAUR/2017/SGR-327
Note: Número d'acord de subvenció MINECO/MAT2014-59961
Note: Número d'acord de subvenció MINECO/ENE2016-80788-C5-5-R
Note: Número d'acord de subvenció MINECO/ENE2016-77798-C4-3-R
Note: Número d'acord de subvenció MINECO/ENE2017-85087
Note: Número d'acord de subvenció MINECO/SEV-2017-0706
Note: Número d'acord de subvenció MINECO/FJCI-2016-29147
Note: Número d'acord de subvenció AGAUR/2017/SGR-128
Rights: Tots els drets reservats.
Language: Anglès.
Document: article ; recerca ; submittedVersion
Subject: CoFe2O4 ; Colloidal ; OER ; Solar fuels ; Prototype
Published in: Applied catalysis B: environmental, Vol. 259 (December 2019) , art. 118055, ISSN 0926-3373

DOI: 10.1016/j.apcatb.2019.118055


Preprint
19 p, 1.3 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles

 Record created 2020-02-06, last modified 2020-03-18



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