Web of Science: 5 citations, Scopus: 5 citations, Google Scholar: citations,
Micelle-assisted electrodeposition of mesoporous Fe-Pt smooth thin films onto various substrates and their electrocatalytic activity towards hydrogen evolution reaction
Isarain-Chávez, E. (Universitat Autònoma de Barcelona. Departament de Física)
Baró, M. D. (Universitat Autònoma de Barcelona. Departament de Física)
Alcantara, Carlos (ETH Zurich. Institute of Robotics and Intelligent Systems)
Pané i Vidal, Salvador (ETH Zurich. Institute of Robotics and Intelligent Systems)
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
Pellicer Vilà, Eva M. (Eva Maria) (Universitat Autònoma de Barcelona. Departament de Física)

Date: 2018
Abstract: 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.
Note: Número d'acord de subvenció EC/H2020/648454
Note: Número d'acord de subvenció EC/EC/H2020/642642
Note: Número d'acord de subvenció MINECO/MAT2017-86357-C3-1-R
Note: Número d'acord de subvenció MINECO/MAT2014-57960-C3-1-R
Note: Número d'acord de subvenció MINECO/RYC-2012-10839
Note: Número d'acord de subvenció AGAUR/2014/SGR-1015
Rights: Tots els drets reservats
Language: Anglès.
Document: article ; recerca ; acceptedVersion
Subject: Electrocatalysis ; Iron ; Mesoporous materials ; Micelles ; Thin films
Published in: ChemSusChem, Vol. 11, issue 2 (Jan. 2018) , p. 367-375, ISSN 1864-5631

DOI: 10.1002/cssc.201701938


Postprint
13 p, 3.5 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > Group of Smart Nanoengineered Materials, Nanomechanics and Nanomagnetism (Gnm3) > SPIN-PORICS
Articles > Research articles
Articles > Published articles

 Record created 2018-04-18, last modified 2020-02-08



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