Anodic Electrodeposition of IrOx Nanoparticles from Aqueous Nanodroplets

IF 4.8 Q2 NANOSCIENCE & NANOTECHNOLOGY

ACS Nanoscience Au Pub Date : 2024-04-18 DOI:10.1021/acsnanoscienceau.3c00061

Saptarshi Paul, Joshua Reyes-Morales, Kingshuk Roy and Jeffrey E. Dick*,

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Abstract

Electrodeposition has been used for centuries to create new materials. However, synthetic platforms are still necessary to enrich a variety of nanomaterials that can be electrodeposited. For instance, IrO_x is a popular material for the water oxidation reaction, but electrodeposition strategies for the controlled growth of IrO_x nanoparticles are lacking. Here, we demonstrate the anodic electrodeposition of IrO_x nanoparticles from aqueous nanodroplets. Field emission scanning electron microscopy (FESEM) and scanning transmission electron microscopy (STEM) images confirm the macro- and microstructure of the resulting nanoparticles. IrO_x nanoparticles of 43 ± 10 nm in diameter were achieved. X-ray photoelectron spectroscopy (XPS) showed the presence of Ir(III) and Ir(IV) hydrated oxyhydroxide species. The synthesis of IrO_x nanoparticles under anodic conditions using water nanodroplets expands the capabilities of our technique and provides a tunable platform for IrO_x nanoparticle electrodeposition.

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从纳米水滴中阳极电沉积氧化铱纳米粒子

几个世纪以来，人们一直利用电沉积来制造新材料。然而，要丰富各种可电沉积的纳米材料，仍然需要合成平台。例如，IrOx 是一种用于水氧化反应的常用材料，但目前还缺乏控制 IrOx 纳米粒子生长的电沉积策略。在这里，我们展示了从纳米水滴中阳极电沉积 IrOx 纳米粒子的方法。场发射扫描电子显微镜（FESEM）和扫描透射电子显微镜（STEM）图像证实了纳米颗粒的宏观和微观结构。得到的 IrOx 纳米粒子直径为 43 ± 10 nm。X 射线光电子能谱（XPS）显示存在 Ir(III) 和 Ir(IV) 水合氢氧化物物种。利用纳米水滴在阳极条件下合成 IrOx 纳米粒子拓展了我们的技术能力，并为 IrOx 纳米粒子的电沉积提供了一个可调整的平台。

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来源期刊

ACS Nanoscience Au 材料科学、纳米科学-

CiteScore

4.20

自引率

0.00%

发文量

期刊介绍： ACS Nanoscience Au is an open access journal that publishes original fundamental and applied research on nanoscience and nanotechnology research at the interfaces of chemistry biology medicine materials science physics and engineering.The journal publishes short letters comprehensive articles reviews and perspectives on all aspects of nanoscience and nanotechnology:synthesis assembly characterization theory modeling and simulation of nanostructures nanomaterials and nanoscale devicesdesign fabrication and applications of organic inorganic polymer hybrid and biological nanostructuresexperimental and theoretical studies of nanoscale chemical physical and biological phenomenamethods and tools for nanoscience and nanotechnologyself- and directed-assemblyzero- one- and two-dimensional materialsnanostructures and nano-engineered devices with advanced performancenanobiotechnologynanomedicine and nanotoxicologyACS Nanoscience Au also publishes original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials engineering physics bioscience and chemistry into important applications of nanomaterials.

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