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Updated: Jan 29, 2026
06:32
A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
Published on: August 17, 2016
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FeSe2-BiSe2-CoSe2 Ternary Heterojunction for Efficient Hydrogen Evolution Reaction Under pH-Universal.
Lili Guo1, Yang Cui2, Qiusheng He2
1School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China.
Materials (Basel, Switzerland)
|January 28, 2026
Summary
This study synthesized a novel FeSe2-BiSe2-CoSe2 heterostructure for enhanced hydrogen evolution reaction (HER) catalysis. The material demonstrates excellent activity in both acidic and alkaline conditions due to optimized electronic structure and pore architecture.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Heterostructures are effective for enhancing material activity and stability.
- Transition metal selenides are promising catalysts for the hydrogen evolution reaction (HER).
Purpose of the Study:
- To synthesize and characterize a ternary heterojunction FeSe2-BiSe2-CoSe2 for HER catalysis.
- To investigate the electronic structure and pore effects on catalytic performance.
Main Methods:
- Hydrothermal selenidation reaction for synthesizing FeSe2-BiSe2-CoSe2.
- Electrochemical measurements in acidic (0.5 M H2SO4) and alkaline (1 M KOH) media.
Main Results:
- FeSe2-BiSe2-CoSe2 exhibits significant charge transfer due to electronegativity differences.
- Abundant pore structure enhances electron diffusion and HER kinetics.
- Outstanding HER activity achieved with low overpotentials (44 mV in acid, 188 mV in alkaline).
Conclusions:
- The FeSe2-BiSe2-CoSe2 heterostructure shows high performance in HER catalysis.
- Electronic structure regulation and pore engineering are key for designing efficient catalysts.
- Provides insights for developing low-cost, high-performance transition metal selenide HER catalysts.
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