Graphene Quantum Dot-Mediated Atom-Layer Semiconductor Electrocatalyst for Hydrogen Evolution

IF 31.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Nano-Micro Letters Pub Date : 2023-09-28 DOI:10.1007/s40820-023-01182-7

Bingjie Hu, Kai Huang, Bijun Tang, Zhendong Lei, Zeming Wang, Huazhang Guo, Cheng Lian, Zheng Liu, Liang Wang

引用次数: 0

Abstract

Highlights

The functional groups on graphene quantum dots (GQDs) for boosting the formation of MoS₂ nanosheets via theoretical calculations were predicted.
Near atom-layer-QD@SO₃ with about 2 nm were synthesized using a functionalized GQD-induced in-situ bottom-up approach.
Mechanistic insight on the role of functionalized GQDs was elaborated, namely, electron-withdrawing group functionalized GQDs facilitate the formation of nanosheet architectures of MoS₂ compared to electron-donating group.

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石墨烯量子点介导的原子层半导体析氢电催化剂。

半导体2H相二硫化钼（2H-MoS2）的析氢反应性能是实现其全部潜在应用的重要障碍。在这里，我们利用理论计算来预测可能的功能化石墨烯量子点（GQDs），它可以增强大块MoS2的HER活性。随后，我们设计了一种功能化GQD诱导的原位自下而上的策略，通过调节吸电子/给电子官能团的浓度来制备由GQDs介导的近原子层2H-MoS2纳米片（ALQD）。实验结果表明，在ALQD的合成过程中引入一系列功能化GQD起着至关重要的作用。值得注意的是，GQD上吸电子官能团的浓度和强度越高，所得到的ALQD就越薄和越活性。值得注意的是，合成的近原子层ALQD-SO3表现出显著改善的HER性能。我们的GQD诱导策略为扩大MoS2的催化应用提供了一种简单有效的方法。此外，它在开发其他过渡金属二硫族化合物材料中的纳米片方面具有巨大的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

42.40

自引率

4.90%

发文量

715

审稿时长

13 weeks

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary and open-access journal that focus on science, experiments, engineering, technologies and applications of nano- or microscale structure and system in physics, chemistry, biology, material science, pharmacy and their expanding interfaces with at least one dimension ranging from a few sub-nanometers to a few hundreds of micrometers. Especially, emphasize the bottom-up approach in the length scale from nano to micro since the key for nanotechnology to reach industrial applications is to assemble, to modify, and to control nanostructure in micro scale. The aim is to provide a publishing platform crossing the boundaries, from nano to micro, and from science to technologies.