Issue 21, 2024

Fabrication of amorphous subnanometric palladium nanostructures on metallic transition metal dichalcogenides for efficient hydrogen evolution reaction

Abstract

Fabricating solution-processable composite materials of transition metal dichalcogenides (TMDs) with ultrasmall noble metal structures employing an easy preparation method poses a significant challenge. In this study, we utilized a green, one-step synthetic method by directly employing electrochemical lithium intercalation-based exfoliated metallic TMD nanosheets (MoS2, WS2, and TiS2) to reduce palladium ions (Pd2+) to metallic Pd0, leading to the deposition on their surfaces. The resulting Pd nanoparticles (Pd NPs) in composites (Pd-MoS2, Pd-WS2, and Pd-TiS2) were found to be amorphous, with a size ranging from 0.81 to 1.37 nm. The impact of Pd NP size on hydrogen evolution reaction (HER) activity was elucidated. Among the fabricated composites, Pd-MoS2 exhibits the best HER performance, attributed to its smallest Pd NP size (0.81 nm). It shows an overpotential of 70 mV at a current density of 10 mA cm−2, along with a Tafel slope of 43 mV dec−1. These HER performance metrics surpass those of most Pd-decorated 2D catalysts.

Graphical abstract: Fabrication of amorphous subnanometric palladium nanostructures on metallic transition metal dichalcogenides for efficient hydrogen evolution reaction

Supplementary files

Article information

Article type
Research Article
Submitted
09 Mar 2024
Accepted
24 Apr 2024
First published
02 May 2024

Inorg. Chem. Front., 2024,11, 7296-7306

Fabrication of amorphous subnanometric palladium nanostructures on metallic transition metal dichalcogenides for efficient hydrogen evolution reaction

L. Mei, Y. Zhang, Z. Ye, T. Han, H. Hu, R. Yang, T. Ying, W. Zheng, R. Yan, Y. Zhang, Z. Wang and Z. Zeng, Inorg. Chem. Front., 2024, 11, 7296 DOI: 10.1039/D4QI00622D

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