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Combining Highly Dispersed Amorphous MoS3 with Pt Nanodendrites as Robust Electrocatalysts for Hydrogen Evolution
Ke Guo1, Jinyu Zheng1, Jianchun Bao1
1Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu, 210023, China.
Small (Weinheim an Der Bergstrasse, Germany)
|March 24, 2023
Summary
Highly dispersed amorphous molybdenum trisulfide on platinum nanodendrites (Pt-a-MoS3 NDs) show enhanced hydrogen evolution performance. This novel electrocatalyst offers superior activity and stability in both acidic and alkaline conditions.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Surface modification is key for advanced nanocatalyst design.
- Developing efficient electrocatalysts for hydrogen evolution is crucial for energy applications.
Purpose of the Study:
- To develop highly dispersed amorphous molybdenum trisulfide-anchored platinum nanodendrites (Pt-a-MoS3 NDs) as efficient hydrogen evolution electrocatalysts.
- To investigate the formation mechanism and electrocatalytic properties of Pt-a-MoS3 NDs.
Main Methods:
- In situ polymerization of MoS4^2- onto platinum surfaces.
- Electrocatalytic activity measurements in acidic (H2SO4) and alkaline (KOH) electrolytes.
- Characterization of catalyst morphology and composition.
Main Results:
- Pt-a-MoS3 NDs exhibit significantly enhanced hydrogen evolution activity compared to commercial Pt/C.
- Overpotentials at 10 mA cm-2 were -11.5 mV (0.5 M H2SO4) and -16.3 mV (1 M KOH).
- The interface between a-MoS3 and Pt sites facilitates efficient hydrogen production and enhances stability.
Conclusions:
- Highly dispersed amorphous molybdenum trisulfide anchored on platinum nanodendrites are effective hydrogen evolution electrocatalysts.
- The synergistic interface effect between Pt and a-MoS3 significantly boosts catalytic performance and stability.
- This strategy offers a promising pathway for designing next-generation electrocatalysts.
