[en] Iron-decorated molybdenum disulfide/reduced graphene oxide (Fe-MoS2/rGO) composites with high 1T-MoS2 content were synthesized via a facile hydrothermal process for application as catalysts in hydrogen evolution reaction (HER). Introducing Fe atoms in the synthesis of Fe-MoS2/rGO induced a partial phase transition from 2 H to 1 T in MoS2. The resulting composites exhibited well-dispersed, vertically oriented, petaloid-like 1 T/2H-Fe-MoS₂ nanostructures on the surface of rGO, thereby enhancing the specific surface area. The unique morphology, the presence of the 1 T metallic phase, and the intimate integration with rGO contributed to exceptional HER activity and stability. The structural characteristics of the materials were confirmed using X-ray diffraction (XRD) and Raman spectroscopy. The morphological features of the synthesized materials were assessed through scanning electron microscopy (SEM) and transmission electron microscopy (TEM) imaging. The electrochemical properties of the electrodes were investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The Fe-MoS₂/rGO composites exhibited a low overpotential of 197 mV at a current density of 10 mA cm⁻² and a Tafel slope of 53 mV dec⁻¹ . Additionally, they demonstrated remarkable stability, retaining 96.8 % of their performance after 3000 CV cycles over a 12-hour period. This study thus introduces an innovative phase engineering strategy for the design of efficient electrocatalysts based on 1T-MoS₂, aimed at enhancing the performance of the hydrogen evolution reaction.
Disciplines :
Chemistry
Author, co-author :
Yao, Pengju; School of Materials Science and Engineering, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, China
Gao, Xuemin; School of Materials Science and Engineering, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, China
Xie, Fei; School of Materials Science and Engineering, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, China
Lv, Guicai; School of Materials Science and Engineering, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, China
Yang, Hui; Zhejiang-California International Nanosystems Institute, Zhejiang University, Hangzhou, China
Snyders, Rony ; Université de Mons - UMONS > Faculté des Sciences > Service de Chimie des Interactions Plasma-Surface
Bittencourt, Carla ; Université de Mons - UMONS > Faculté des Sciences > Service de Chimie des Interactions Plasma-Surface
Li, Wenjiang ; School of Materials Science and Engineering, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, China
Language :
English
Title :
Fe doped 1T/2H MoS2/reduced graphene oxide for hydrogen evolution reaction
Research Institute for Materials Science and Engineering
Funders :
Guangxi Key Research and Development Program National Natural Science Foundation of China Higher Education Discipline Innovation Project
Funding text :
This work was supported by Key R & D projects of Guangxi Province (No. 2021AB23009), the National Natural Science Foundation of China (Nos. 21911530255), 111 Project, China (No. D17003); CB thanks the Belgian Fund for Scientific Research under the FRFC contract CDR J001019. CB is a Senior Research of the National Funds for Scientific Research (FRS-FNRS, Belgium).
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