Next Materials· 2026Q1
A symmetric SnS2/Graphene/SnS2 sandwich heterostructure as an efficient electrocatalyst for the hydrogen evolution reaction
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- Q1SCImago
- 2026year
Short summary
A SnS2/Graphene/SnS2 sandwich heterostructure synthesized via hydrothermal method shows optimized electrocatalytic performance for hydrogen evolution reaction at low graphene content.
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Key points
- A SnS2/Graphene/SnS2 sandwich heterostructure was synthesized for hydrogen evolution.
- Increasing graphene content beyond a certain point negatively impacts catalytic performance.
- Low graphene loading promotes optimal H2 adsorption/desorption kinetics.
- First-principles calculations support experimental findings on adsorption energies.
AI-generated from the title and abstract; the full text is not read.
Abstract
This study utilized a simple hydrothermal method to synthesize a SnS 2 /Graphene/SnS 2 sandwich heterostructure for the hydrogen evolution reaction. The findings indicated that increasing the graphene content (SnS 2 /Graphene/SnS 2 -2) results in catalytic performance characterized by a higher overpotential, fewer accessible active sites, and a steeper Tafel slope. These results suggest that while graphene enhances conductivity and charge transfer, excessive amounts can negatively impact overall catalytic effectiveness. First-principles calculations of adsorption energy per atom revealed decreased energies at low reduced graphene oxide (rGO) loading on H 2 -adsorbed SnS 2 /rGO heterostructures. These findings align with the experimental data and indicate that low graphene concentration promotes moderate-to-low adsorption in the SnS 2 /Graphene/SnS 2 heterostructure. The low adsorption energy suggests a thermoneutral Gibbs free energy, which facilitates H-H release and recombination reactions. This study provides valuable insights into optimizing hybrid catalysts for enhanced electrocatalytic applications.
The authors' abstract, as published at the source. Next Materials, 2026 · DOI ↗
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Field: Renewable Energy, Sustainability and the Environment
Renewable Energy, Sustainability and the EnvironmentEnergy