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Assessment of the roughness factor effect and the intrinsic catalytic activity for hydrogen evolution reaction on Ni-based electrodeposits

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Assessment of the roughness factor effect and the intrinsic catalytic activity for hydrogen evolution reaction on Ni-based electrodeposits

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dc.contributor.author Herraiz Cardona, Isaac es_ES
dc.contributor.author Ortega Navarro, Emma María es_ES
dc.contributor.author Garcia-Anton, Jose es_ES
dc.contributor.author Pérez-Herranz, Valentín es_ES
dc.date.accessioned 2017-02-13T17:32:04Z
dc.date.available 2017-02-13T17:32:04Z
dc.date.issued 2011-08
dc.identifier.issn 0360-3199
dc.identifier.uri http://hdl.handle.net/10251/77878
dc.description.abstract The hydrogen evolution reaction (HER) was studied in 30 wt.% KOH solution at temperatures ranging between 30 and 80 °C on three type of electrodes: (i) rough pure Ni electrodeposits, obtained by applying a large current density; (ii) smooth NiCo electrodeposits; (iii) smooth commercial Ni electrodes. By using steady-state polarization curves and electrochemical impedance spectroscopy (EIS) the surface roughness factor and the intrinsic activities of the catalytic layers were determined. These techniques also permitted us to determine the mechanism and kinetics of the HER on the investigated catalysts. Different AC models were tested and the appropriate one was selected. The overall experimental data indicated that the rough/porous Ni electrode yields the highest electrocatalytic activity in the HER. Nevertheless, when the effect of the surface roughness was taken into consideration, it was demonstrated that alloying Ni with Co results in an increased electrocatalytic activity in the HER when comparing to pure Ni. This is due to an improved intrinsic activity of the material, which was explained on the basis of the synergism among the catalytic properties of Ni (low hydrogen overpotential) and of Co (high hydrogen adsorption). es_ES
dc.description.sponsorship Isaac Herraiz-Cardona is grateful to the Ministerio de Ciencia e Innovacion (Spain) for a postgraduate grant (Ref. AP2007-03737). This work was supported by Generalitat Valenciana (Project PROMETEO/2010/023) en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation Ministerio de Ciencia e Innovación (Spain) [AP2007-03737] es_ES
dc.relation Generalitat Valenciana [PROMETEO/2010/023] es_ES
dc.relation.ispartof International Journal of Hydrogen Energy es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Porous Ni electrodeposits es_ES
dc.subject NiCo alloys es_ES
dc.subject Surface roughness factor es_ES
dc.subject Electrochemical impedance spectroscopy es_ES
dc.subject.classification INGENIERIA QUIMICA es_ES
dc.title Assessment of the roughness factor effect and the intrinsic catalytic activity for hydrogen evolution reaction on Ni-based electrodeposits es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.ijhydene.2011.05.047
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería Química y Nuclear - Departament d'Enginyeria Química i Nuclear es_ES
dc.description.bibliographicCitation Herraiz Cardona, I.; Ortega Navarro, EM.; Garcia-Anton, J.; Pérez-Herranz, V. (2011). Assessment of the roughness factor effect and the intrinsic catalytic activity for hydrogen evolution reaction on Ni-based electrodeposits. International Journal of Hydrogen Energy. 36(16):9428-9438. doi:10.1016/j.ijhydene.2011.05.047 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.ijhydene.2011.05.047 es_ES
dc.description.upvformatpinicio 9428 es_ES
dc.description.upvformatpfin 9438 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 36 es_ES
dc.description.issue 16 es_ES
dc.relation.senia 192862 es_ES


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