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RuSe2-CoTe Heterogeneous Surfaces Coated with NC Layer for Excellent HER Performance under Alkaline Condition
Wenhua Fu1, Nan Li1, Minghao Shi1
1Jiangsu Province Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou, Jiangsu 213164, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|September 7, 2023
Summary
Ruthenium diselenide (RuSe2) combined with cobalt telluride (CoTe) and a nitrogen-doped carbon (NC) layer significantly enhances electrocatalytic hydrogen production. This novel catalyst demonstrates superior efficiency and stability for the hydrogen evolution reaction.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Electrocatalytic hydrogen production offers a promising route to high-purity hydrogen.
- Ruthenium (Ru) is a cost-effective alternative to platinum (Pt) for hydrogen binding.
- Single-component RuSe2 exhibits insufficient electron density for large-scale applications.
Purpose of the Study:
- To enhance the electrocatalytic activity of RuSe2 for hydrogen evolution reaction (HER).
- To investigate the effect of electronic modulation on RuSe2 using cobalt telluride (CoTe).
- To develop a stable and efficient catalyst for practical hydrogen production.
Main Methods:
- Synthesis of a composite catalyst comprising RuSe2, CoTe, and a nitrogen-doped carbon (NC) layer.
- Electrochemical characterization including overpotential and Tafel slope measurements.
- Long-term stability testing of the synthesized electrode material.
Main Results:
- The RuSe2-CoTe/NC electrode achieved an overpotential of 25.4 mV at 10 mA cm-2, significantly lower than RuSe2/NF (65 mV) and CoTe/NC (115 mV).
- The Tafel slope for RuSe2-CoTe/NC (67.8 mV dec-1) indicated improved HER kinetics compared to individual components.
- The catalyst demonstrated excellent long-term stability, with no significant activity decrease after 30 hours of operation.
Conclusions:
- The synergistic effect between RuSe2 and CoTe, facilitated by the conductive NC layer, optimizes electronic structure and electron transfer.
- The developed RuSe2-CoTe/NC heterojunction exhibits superior electrocatalytic performance and kinetics for HER.
- This composite material shows great potential as a stable and efficient electrocatalyst for hydrogen production.
