Micelle-assisted electrodeposition of highly mesoporous Fe–Pt nodular films with soft magnetic and electrocatalytic properties,Nanoscale

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Micelle-assisted electrodeposition of highly mesoporous Fe–Pt nodular films with soft magnetic and electrocatalytic properties
Nanoscale ( IF 5.8 ) Pub Date : 2017-11-06 00:00:00 , DOI: 10.1039/c7nr05561g
Eloy Isarain-Chávez _{1,

2,

3,

4} , Maria Dolors Baró _{1,

2,

3,

4} , Eva Pellicer _{1,

2,

3,

4} , Jordi Sort _{1,

2,

3,

4,

5}

Affiliation

Mesoporous Fe–Pt nodular films (with a regular spatial arrangement of sub-15 nm pores) are grown onto evaporated Au, Cu and Al conductive layers by micelle-assisted electrodeposition from metal chloride salts in the presence of Pluronic P123 tri-block copolymer dissolved in the aqueous electrolytic bath. This synthetic approach constitutes a simple, one-step, versatile procedure to grow multifunctional mesoporous layers appealing for diverse applications that take advantage of materials with an ultra-high surface area-to-volume ratio. The films exhibit tuneable composition with relative Fe/Pt weight ratios, disregarding oxygen, varying from 4/96 to 52/48. All the mesoporous alloys show a soft magnetic behaviour with tuneable saturation magnetization and coercivity values (the latter ranging from ca. 5 Oe to 40 Oe). In addition, the Au/Fe–Pt deposits (even the ones with higher Fe content) exhibit good performance towards hydrogen evolution reaction in both alkaline and acidic media due to the inherent mesoporosity, with excellent stability after running 50 cycles. The interest of alloying Fe with Pt is thus two-fold: (i) to confer magnetic properties to the mesoporous alloys and (ii) to reduce the amount of the costly noble metal in the electrocatalyst in an environmentally sustainable manner.

中文翻译：

具有软磁和电催化特性的高介孔Fe-Pt结节膜的胶束辅助电沉积

在溶解有Pluronic P123三嵌段共聚物的情况下，通过从金属氯化物中进行胶束辅助电沉积，将中孔Fe–Pt结节膜（具有规则的15nm以下的孔的空间排列）生长在蒸发的Au，Cu和Al导电层上在水性电解浴中。这种合成方法构成了一种简单的，一步一步的通用过程，可以生长多功能介孔层，从而吸引了利用具有超高表面积/体积比的材料的各种应用的需求。所述膜表现出可调节的组成，相对于Fe / Pt的重量比，不考虑氧气，范围为4/96至52/48。所有的介孔合金均表现出软磁特性，且具有可调节的饱和磁化强度和矫顽力值（后者的范围约为）。5 Oe到40 Oe）。此外，由于固有的介孔性，Au / Fe-Pt沉积物（甚至是铁含量较高的沉积物）在碱性和酸性介质中均表现出良好的制氢反应性能，在运行50个循环后具有出色的稳定性。因此，将Fe与Pt合金化的兴趣有两方面：（i）赋予中孔合金以磁性，以及（ii）以环境可持续的方式减少电催化剂中昂贵的贵金属的量。

更新日期：2017-11-23

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