气相辅助原位合成Nb2CTxNS/NbO2F MXene异质结构以增强太阳能驱动的光电化学性能

IF 4.6 2区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry Letters Pub Date : 2024-12-27 DOI:10.1021/acs.jpclett.4c02684

Ying-Chih Pu, Yi-Chen Yu, Jen-An Shih, Yi-Li Chen, I-Wen Peter Chen

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引用次数: 0

摘要

光催化水分解在将太阳能转化为有价值的化学产品方面具有巨大的潜力。然而，诸如电子-空穴对的快速重组和光催化剂的活性表面积不足等障碍仍然是重大的挑战。在这项研究中，我们首次证明了锂二（三氟甲烷磺酰）亚胺蒸气成功地蚀刻Nb2AlC MAX相粉末中的铝，同时在Nb2CTx纳米片（Nb2CTxNS） MXene上形成NbO2F锚点，导致Nb2CTxNS/NbO2F异质结构复合材料的原位形成。该材料具有优异的光电化学性能，电流密度达到252 μA cm-2，分别是Nb2AlC MAX和Nb2C纳米片MXene的1000倍和10倍。这些发现揭示了通过蒸汽辅助合成开发光催化材料的创新方法，为推进光和能源相关领域的材料发现提供了一条有希望的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Vapor-Assisted In Situ Synthesis of the Nb2CTxNS/NbO2F MXene Heterostructure for Enhanced Solar-Driven Photoelectrochemical Performance

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Vapor-Assisted In Situ Synthesis of the Nb2CTxNS/NbO2F MXene Heterostructure for Enhanced Solar-Driven Photoelectrochemical Performance

Photocatalytic water splitting holds great potential for transforming solar energy into valuable chemical products. However, obstacles such as the rapid recombination of electron–hole pairs and insufficiently active surface areas of photocatalysts remain significant challenges. In this study, we present the first demonstration that lithium bis(trifluoromethanesulfonyl)imide vapor successfully etches aluminum from Nb₂AlC MAX phase powders while concurrently forming NbO₂F anchors on Nb₂CT_x nanosheet (Nb₂CT_xNS) MXene, leading to the in situ formation of a Nb₂CT_xNS/NbO₂F heterostructure composite. This novel material exhibits a remarkable photoelectrochemical performance, achieving a current density of 252 μA cm^–2, which is 1000 and 10 times greater than those of Nb₂AlC MAX and Nb₂C nanosheet MXene, respectively. These findings shed light on innovative approaches for developing photocatalytic materials via vapor-assisted synthesis, offering a promising pathway for advancing material discovery in both photo- and energy-related fields.

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来源期刊

The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

9.60

自引率

7.00%

发文量

1519

审稿时长

1.6 months

期刊介绍： The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.