In this study, spectroelectrochemical (SPE) studies to monitor the electrochromic properties of electrochemically synthesized sub‐10 nm sized Prussian blue (PB) nanostructures (NSs) are employed. At the beginning the dark blue coloured device, shifts reversibly between translucent and dark‐blue while applying an applied bias between +1 to −1 V with an opposite polarization. Amine functionalized silicate sol‐gel matrix (SSG) is used as a solid support and stabilizer for electrodepositing highly uniform sub‐10 nm PB NSs. The SSG's film thickness is suitably optimized through suitable controlled experiments. It is found that the SPE behaviour of sub‐10 nm sized PB NSs, suitably followed a colour modulation of PB into Prussian white (PW) and vice‐versa. SPE studies are used to investigate the redox switching between the PB and PW and which are responsible for an electrochromic function of a fabricated electrochromic device (ECD). Fabricated ECD has demonstrated an optical modulation at 680 nm with the moderate coloration efficiency of 115.8 cm²/C. Present study validates the SPE feature of sub‐10 nm PB NSs as an active electrochromic nanomaterial and demonstrating the applicability of SPE technique to investigate the variety of electrochromic nanomaterials, with consequences in both spectral and electrochemically active nanomaterials for electrochromic device applications.

中文翻译：

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硅酸盐溶胶凝胶基质支持的亚10纳米普鲁士蓝纳米结构电致变色器件的光谱电化学研究

在这项研究中，采用光谱电化学（SPE）研究来监测电化学合成的亚10纳米尺寸普鲁士蓝（PB）纳米结构（NSs）的电致变色性能。在开始时，深蓝色器件会在半透明和深蓝色之间可逆移动，同时在+1至-1 V之间施加极性相反的施加偏压。胺官能化的硅酸盐溶胶凝胶基质（SSG）用作电沉积高度均匀的10 nm以下PB NSs的固体载体和稳定剂。SSG的膜厚可通过适当的受控实验进行适当优化。我们发现，小于10 nm的PB NS的SPE行为适合将PB的颜色调制为普鲁士白（PW），反之亦然。SPE研究用于研究PB和PW之间的氧化还原切换，它们负责制造的电致变色器件（ECD）的电致变色功能。预制的ECD证明了在680 nm处的光学调制，适度的着色效率为115.8 cm² /℃。本研究验证了亚10 nm PB NSs的SPE特性是一种活性电致变色纳米材料，并证明了SPE技术可用于研究各种电致变色纳米材料，从而影响了用于电致变色器件应用的光谱和电化学活性纳米材料。