Micelle-assisted electrodeposition of mesoporous Fe-Pt smooth thin films onto various substrates and their electrocatalytic activity towards hydrogen evolution reaction
Isarain-Chávez, Eloy. (Universitat Autònoma de Barcelona. Departament de Física)
Baró, M. D.. (Universitat Autònoma de Barcelona. Departament de Física)
Alcantara, Carlos (ETH Zürich. Institute of Robotics and Intelligent Systems)
Pané i Vidal, Salvador (ETH Zürich. Institute of Robotics and Intelligent Systems)
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
Pellicer Vilà, Eva Maria (Universitat Autònoma de Barcelona. Departament de Física)

Data:	2018
Resum:	Mesoporous Fe-Pt thin films are obtained by micelle-assisted electrodeposition onto metallic substrates with dissimilar activity (namely, gold, copper, and aluminum seed layers evaporated on Si/Ti) under constant applied potential (E=-1. 1 V vs. Ag/AgCl) and deposition time (600 s). The amphiphilic triblock copolymer Pluronic P-123 is used as a soft template to guide the formation of mesopores. The occurrence of pores (ca.  7 nm in diameter) with narrow size distribution, distributed evenly over the surface, is observed in all cases. Despite the applied conditions being the same, the roughness and the amount of Fe incorporated in the films are influenced by the nature of the substrate. In particular, ultra-smooth films containing a larger amount of Fe (21 wt %) are obtained when deposition takes place on the Au surface. X-ray diffraction analyses reveal that Pt and Fe are alloyed to a certain extent, although some iron oxides/hydroxides also unavoidably form. The resulting films have been tested as electrocatalysts in the hydrogen evolution reaction (HER) in alkaline media. The mesoporous Fe-rich Fe-Pt films on Au show excellent HER activity and cyclability.
Ajuts:	European Commission 648454 European Commission 642642 Ministerio de Economía y Competitividad MAT2017-86357-C3-1-R Ministerio de Economía y Competitividad MAT2014-57960-C3-1-R Ministerio de Economía y Competitividad RYC-2012-10839 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1015
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Electrocatalysis ; Iron ; Mesoporous materials ; Micelles ; Thin films
Publicat a:	ChemSusChem, Vol. 11, issue 2 (Jan. 2018) , p. 367-375, ISSN 1864-564X

DOI: 10.1002/cssc.201701938
PMID: 29165918

Postprint 13 p, 3.5 MB

El registre apareix a les col·leccions:
Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > Grup de nanoenginyeria de materials, nanomagnetisme i nanomecànica (Gnm3) > SPIN-PORICS
Articles > Articles de recerca
Articles > Articles publicats