Electrodeposition of nanostructured cobalt films from a deep eutectic solvent: Influence of the substrate and deposition potential range

被引：28
作者：
Landa-Castro, Midori [1 ,2 ]
Sebastian, Paula [2 ,3 ]
Giannotti, Marina, I [2 ,4 ,5 ]
Serra, Albert [6 ]
Gomez, Elvira [1 ,7 ]
机构：
[1] Univ Autonoma Metropolitana Azcapotzalco, Dept Mat, Av San Pablo 180 Col, Mexico City, DF, Mexico
[2] Univ Barcelona, Dept Ciencia Mat & Quim Fis, Marti i Franques 1, Barcelona 08028, Spain
[3] Univ Copenhagen, Dept Chem, Univ Pk 5, DK-2100 Copenhagen, Denmark
[4] Biomed Res Networking Ctr Bioengn Biomat & Nanome, Zaragoza, Spain
[5] Barcelona Inst Sci & Technol, Inst Bioengn Catalunya IBEC, Barcelona, Spain
[6] Empa, Swiss Fed Labs Mat Sci & Technol, Lab Mech Mat & Nanostruct, Feuerwerkerstr 39, CH-3602 Thun, Switzerland
[7] Univ Barcelona, Inst Nanosci & Nanotechnol IN2UB, Barcelona, Spain
来源：
ELECTROCHIMICA ACTA | 2020年 / 359卷
关键词：
Cobalt electrodeposition; Deep eutectic solvent; First growth stages; Substrate influence; UNDERPOTENTIAL DEPOSITION; ELECTROCHEMICAL SYNTHESIS; CHOLINE CHLORIDE; TEMPLATE SYNTHESIS; IONIC LIQUIDS; THIN-FILMS; CO; SURFACES; NANOPARTICLES; COMPOSITES;
D O I：
10.1016/j.electacta.2020.136928
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The purpose of this systematic study was to investigate the effects of specific substrates and potential conditions applied while tailoring the morphology and chemical composition of nanostructured Co films. In particular, Co electrodeposition in sustainable choline chloride-urea deep eutectic solvent was assessed, using glassy carbon and two metals widely employed in electrocatalysis and biocompatible purposes, Pt and Au, as substrates for modification with Co. Various in situ electrochemical techniques were combined with a broad range of ex-situ characterization and chemical-composition techniques for a detailed analysis of the prepared Co films. Among the results, nanostructured Co films with high extended active surface areas and variable composition of oxo and hydroxyl species could be tuned by simply modulating the applied potential limits, and without using additives or surfactant agents. The study highlights the effectiveness of using deep eutectic solvent as suitable electrolyte for surface modification by controlled deposition of nanostructured Co films with further application in electrocatalysis. (c) 2020 Elsevier Ltd. All rights reserved.
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页数：12
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