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dc.contributor.author | Bausá, Nuria | es_ES |
dc.contributor.author | Serra Alfaro, José Manuel | es_ES |
dc.date.accessioned | 2021-02-04T04:32:30Z | |
dc.date.available | 2021-02-04T04:32:30Z | |
dc.date.issued | 2019-07-04 | es_ES |
dc.identifier.uri | http://hdl.handle.net/10251/160693 | |
dc.description.abstract | [EN] Backbone electrodes based on an electronic conductor and a protonic conductor show advantages for proton ceramic electrolyzer cells (PCECs). This work, aims to shed further light on the nature of the rate determining steps in the anode operation and improve the reaction rate in high steam pressure electrolysis mode by (i) adjusting their catalytic activity through electrode infiltration with catalytic electronic-conducting nanoparticles; and (ii) electrochemical activation of surface species by applying a net current through the electrode. A composite formed by La0.8Sr0.2MnO3-delta (LSM) and BaCe0.2Zr0.7Y0.1O3-delta (BCZY27) was deposited on proton-conducting BCZY27 electrolytes and studied in symmetrical cells to investigate the anode microstructure and electrochemical performance. Electrochemical impedance spectroscopy (EIS) measurements were performed in the 800-500 degrees C range under 3 bar of pressure of wet air (75% of steam). LSM/BCZY27 50/50 vol% showed the best performance with an electrode polarization resistance (R-p) of 6.04 omega cm(2) at 700 degrees C and high steam pressure (0.75 bar of air and 2.25 bar of steam) whereas LSM/BCZY27 60/40 vol% presented a R-p of 18.9 omega cm(2). The backbone electrodes were infiltrated using aqueous solutions of metal precursors to boost the electrocatalytic activity towards water splitting and oxygen evolution. The infiltrated cells were fired at 850 degrees C for 2 h to obtain the desired crystalline nanoparticles (Pr6O11, CeO2, ZrO2 and Pr6O11-CeO2) and electrochemically tested under high steam pressures and bias currents to investigate the influence of catalytic activation on surface exchange kinetics. Among the tested catalysts, the lowest electrode polarization resistances (<0.2 omega cm(2)) were reached for the Pr6O11, CeO2 and Pr6O11-CeO2 catalysts at 700 degrees C by applying current densities ranging from 1.57 to 14.15 mA cm(-2), and the Pr6O11-CeO2-activated LSM/BCZY27 electrode exhibited the best performance. Finally, the effect of pO(2) and pH(2)O was investigated aiming to characterize the rate limiting processes in the electrodes. | es_ES |
dc.description.sponsorship | Financial support by the Spanish Government (Grants SEV-2016-0683, RTI2018-102161 and ENE2014-57651), Generalitat Valenciana (PROMETEO/2018/006) and by the EU through FP7 Electra Project (Grant Agreement 621244) is gratefully acknowledged. The support of the microscopy service at Universitat Politecnica de Valencia (UPV) for the SEM analysis is recognized. | es_ES |
dc.language | Inglés | es_ES |
dc.publisher | The Royal Society of Chemistry | es_ES |
dc.relation.ispartof | RSC Advances | es_ES |
dc.rights | Reconocimiento - No comercial (by-nc) | es_ES |
dc.title | Robust catalytically-activated LSM-BCZY-based composite steam electrodes for proton ceramic electrolysis cells | es_ES |
dc.type | Artículo | es_ES |
dc.identifier.doi | 10.1039/c9ra04044g | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO//ENE2014-57651-R/ES/ALMACENAMIENTO DE ENERGIA VIA REDUCCION DE CO2 A COMBUSTIBLES Y PRODUCTOS QUIMICOS/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/EC/FP7/621244/EU/High temperature electrolyser with novel proton ceramic tubular modules of superior efficiency, robustness, and lifetime economy/ | |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO//SEV-2016-0683/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/GVA//PROMETEO%2F2018%2F006/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-102161-B-I00/ES/CONVERSION DIRECTA DE CO2 EN PORTADORES DE ENERGIA QUIMICA UTILIZANDO REACTORES ELECTROCATALITICOS DE MEMBRANA/ | es_ES |
dc.rights.accessRights | Abierto | es_ES |
dc.contributor.affiliation | Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química | es_ES |
dc.description.bibliographicCitation | Bausá, N.; Serra Alfaro, JM. (2019). Robust catalytically-activated LSM-BCZY-based composite steam electrodes for proton ceramic electrolysis cells. RSC Advances. 9(36):20677-20686. https://doi.org/10.1039/c9ra04044g | es_ES |
dc.description.accrualMethod | S | es_ES |
dc.relation.publisherversion | https://doi.org/10.1039/c9ra04044g | es_ES |
dc.description.upvformatpinicio | 20677 | es_ES |
dc.description.upvformatpfin | 20686 | es_ES |
dc.type.version | info:eu-repo/semantics/publishedVersion | es_ES |
dc.description.volume | 9 | es_ES |
dc.description.issue | 36 | es_ES |
dc.identifier.eissn | 2046-2069 | es_ES |
dc.relation.pasarela | S\390605 | es_ES |
dc.contributor.funder | European Commission | es_ES |
dc.contributor.funder | Generalitat Valenciana | es_ES |
dc.contributor.funder | Ministerio de Economía y Competitividad | es_ES |
dc.contributor.funder | Agencia Estatal de Investigación | es_ES |
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