当前位置: X-MOL 学术J. Am. Chem. Soc. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Solution-Processable Microstructuring of 1T′-Phase Janus MoSSe Monolayers for Boosted Hydrogen Production
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2024-08-09 , DOI: 10.1021/jacs.4c05692
Zhengqing Liu 1 , Zhehao Sun 2 , Xiaoyan Qu 3 , Kunkun Nie 1 , Yawei Yang 4 , Binjie Li 1 , Shaokun Chong 1 , Zongyou Yin 2 , Wei Huang 1
Affiliation  

Janus monolayers of transition metal dichalcogenides (TMDs) offer versatile applications due to their tunable polymorphisms. While previous studies focused on conventional 2H-phase Janus monolayers, the scalable synthesis of an unconventional 1T′ phase remains challenging. We present a novel solution strategy for fabricating Janus 1T′-MoOSe and MoSSe monolayers by growing sandwiched Se–Mo–O/S shells onto Au nanocores. The Janus Au@1T′-MoSSe catalyst exhibits superior electrocatalytic hydrogen evolution reaction (HER) activity compared to 1T′-MoS2, -MoSe2, and -MoOSe, attributed to its unique electronic structure and intrinsic strain. Remarkably, photoexciting the nanoplasmonic Au cores further enhances the HER via a localized surface plasmon (LSP) effect that drives hot electron injection into surface sulfur vacancies of 1T′-MoSSe monolayer shells, accelerating proton reduction. This synergistic activation of anion vacancies by internal strain and external light-induced Au LSPs, coupled with our scalable synthesis, provides a pathway for developing tailorable polymorphic Janus TMDs for specific applications.

中文翻译:


用于提高产氢量的 1T′ 相 Janus MoSSe 单层溶液加工微​​结构



过渡金属二硫属化物 (TMD) 的 Janus 单层由于其可调节的多态性而提供了多种应用。虽然之前的研究主要集中在传统的 2H 相 Janus 单层,但非常规 1T' 相的可扩展合成仍然具有挑战性。我们提出了一种新颖的解决方案策略,通过在金纳米核上生长夹层 Se-Mo-O/S 壳来制造 Janus 1T′-MoOSe 和 MoSSe 单层。与1T'-MoS 2 、-MoSe 2和-MoOSe相比,Janus Au@1T'-MoSSe催化剂表现出优异的电催化析氢反应(HER)活性,这归因于其独特的电子结构和固有应变。值得注意的是,光激发纳米等离子体Au核通过局域表面等离子体(LSP)效应进一步增强HER,该效应驱动热电子注入1T'-MoSSe单层壳的表面硫空位,加速质子还原。这种通过内部应变和外部光诱导的 Au LSP 对阴离子空位的协同激活,再加上我们的可扩展合成,为开发用于特定应用的可定制多态 Janus TMD 提供了一条途径。
更新日期:2024-08-09
down
wechat
bug