纳米结构ni掺杂SnS2光阳极用于高效光电化学水分解

IF 5.5 3区 材料科学 Q2 CHEMISTRY, PHYSICAL
Sarita Mittal, Mohit Khosya and Neeraj Khare*, 
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引用次数: 0

摘要

本研究探讨了镍(Ni)掺杂对SnS2光电极在水分解应用中性能的影响。采用水热法制备了不同Ni浓度(3、6、10 wt %)的SnS2纳米片。光电化学研究表明,与裸SnS2相比,6 wt % ni掺杂SnS2 (6- nss)的光电流密度显著增加~ 22倍,电荷转移电阻降低,IPCE值提高。Mott-Schottky分析显示,6-NSS光电极的平带电位(VFB)呈负位移,表明带弯曲增加,载流子分离改善。这种PEC性能的增强归因于引入了作为电荷载流子捕获位点的缺陷,从而降低了电荷载流子的重组率。BET分析显示,6-NSS的表面积明显高于裸SnS2,这表明存在更多可用于PEC氧化还原反应的活性位点。EIS研究表明,ni掺杂SnS2具有较低的电荷转移电阻,表明电荷转移和分离效率提高。结果表明,Ni掺杂显著提高了SnS2的PEC性能,使其成为一种很有前途的高效水分解光阳极。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Nanostructured Ni-Doped SnS2 Photoanode for Efficient Photoelectrochemical Water Splitting

Nanostructured Ni-Doped SnS2 Photoanode for Efficient Photoelectrochemical Water Splitting

This research explores the impact of nickel (Ni) doping on the performance of SnS2 photoelectrodes in water-splitting applications. A series of Ni-doped SnS2 nanosheets with varying concentrations of Ni (3, 6, and 10 wt %) are synthesized using the hydrothermal method. The photoelectrochemical study reveals a significant ∼22 times increment in the photocurrent density, a decrease in the charge transfer resistance, and an improved IPCE value for 6 wt % Ni-doped SnS2 (6-NSS) as compared to bare SnS2. Mott–Schottky analysis reveals a negative shift in the flat-band potential (VFB) for the 6-NSS photoelectrode, indicating increased band bending and improved charge carrier separation. This enhancement in PEC performance is attributed to the introduction of defects that act as trapping sites for charge carriers, thereby reducing the recombination rate of charge carriers. The BET analysis reveals that 6-NSS has a significantly higher surface area compared to bare SnS2, suggesting the presence of more active sites available for PEC redox reactions. EIS studies support these findings by showing a lower charge transfer resistance in Ni-doped SnS2, indicating improved charge transfer and separation efficiency. The results demonstrate that Ni doping significantly enhances the PEC performance of SnS2, making it a promising photoanode for efficient water-splitting applications.

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来源期刊
ACS Applied Energy Materials
ACS Applied Energy Materials Materials Science-Materials Chemistry
CiteScore
10.30
自引率
6.20%
发文量
1368
期刊介绍: ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.
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