A Metal–Organic Frameworks Derived 1T‐MoS2 with Expanded Layer Spacing for Enhanced Electrocatalytic Hydrogen Evolution. Issue 4 (24th November 2022)

• Record Type: Journal Article
• Authors: Zhang, Hang; Xu, Hualan; Wang, Lei; Ouyang, Chuying; Liang, Haiwei; Zhong, Shengliang
• Is Part Of: Small. Volume 19:Issue 4(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-24
• Subjects: 1T‐MoS 2 -- electrocatalytic hydrolysis -- expanded layer spacing -- hydrogen evolution reactions -- metal–organic framework‐derived; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.202205736
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: Metal phase molybdenum disulfide (1T‐MoS2 ) is considered a promising electrocatalyst for hydrogen evolution reaction (HER) due to its activated basal and superior electrical conductivity. Here, a one‐step solvothermal route is developed to prepare 1T‐MoS2 with expanded layer spacing through the derivatization of a Mo‐based organic framework (Mo‐MOFs). Benefiting from N, N ‐dimethylformamide oxide as external stress, the interplanar spacing of (002) of the MoS2 catalyst is extended to 10.87 Å, which represents the largest one for the 1T‐MoS2 catalyst prepared by the bottom‐up approach. Theoretical calculations reveal that the expanded crystal planes alter the electronic structure of 1T‐MoS2, lower the adsorption–desorption potentials of protons, and thus, trigger efficient catalytic activity for HER. The optimal 1T‐MoS2 catalyst exhibits an overpotential of 98 mV at 10 mA cm −2 for HER, corresponding to a Tafel slope of 52 mV dec −1 . This Mo‐MOFs‐derived strategy provides a potential way to design high‐performance catalysts by adjusting the layer spacing of 2D materials. Abstract : 1T‐MoS2 with a crystalline spacing of 10.87 Å is prepared by Mo‐metal–organic frameworks derivatization strategy for efficient hydrogen evolution reaction, where N, N ‐dimethylformamide oxide is used as an expanded crystalline spacing filler, allowing the 1T‐MoS2 maintained after long‐term electrocatalytic stability tests. The stable large layer spacing shapes larger ion/proton channels, which is also confirmed by the DFT calculations.