TY - JOUR
T1 - Micelle-Assisted Electrodeposition of Mesoporous Fe–Pt Smooth Thin Films and their Electrocatalytic Activity towards the Hydrogen Evolution Reaction
AU - Isarain-Chávez, Eloy
AU - Baró, Maria Dolors
AU - Alcantara, Carlos
AU - Pané, Salvador
AU - Sort, Jordi
AU - Pellicer, Eva
PY - 2018/1/23
Y1 - 2018/1/23
N2 - © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim 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.
AB - © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim 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.
KW - electrocatalysis
KW - iron
KW - mesoporous materials
KW - micelles
KW - thin films
UR - https://ddd.uab.cat/record/189194
U2 - https://doi.org/10.1002/cssc.201701938
DO - https://doi.org/10.1002/cssc.201701938
M3 - Article
C2 - 29165918
VL - 11
SP - 367
EP - 375
JO - ChemSusChem
JF - ChemSusChem
SN - 1864-5631
IS - 2
ER -