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Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment
Interfacial chemical bond and internal electric field modulated Z-scheme Sv-ZnIn2S4/MoSe2 photocatalyst for efficient hydrogen evolution
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Conflicts of Interest
Identified Weaknesses
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Paper Summary
Paperzilla title
Mo-S Bond Bridges the Gap to Efficient Hydrogen!
This study reports a Z-scheme Sv-ZnIn2S4/MoSe2 photocatalyst with an interfacial Mo-S bond that significantly enhances hydrogen evolution. The optimized photocatalyst achieved a high hydrogen evolution rate of 63.21 mmol•g⁻¹•h⁻¹ under visible light, attributed to the synergistic effects of the Mo-S bond, internal electric field, and sulfur vacancies facilitating efficient charge separation and transfer.
Possible Conflicts of Interest
None identified
Identified Weaknesses
Lack of long-term stability assessment
The paper does not adequately explore the long-term stability of the photocatalyst, which is crucial for practical applications. Factors like photocorrosion and deactivation under prolonged operation are not addressed.
Missing cost analysis
While the hydrogen evolution rate is impressive, the paper lacks a detailed cost analysis of the synthesis process and the materials used. This information is essential for evaluating the economic feasibility of the photocatalyst for large-scale hydrogen production.
Limited discussion of oxygen evolution
The paper primarily focuses on hydrogen evolution but doesn't discuss the oxygen evolution half-reaction in detail. For overall water splitting, efficient oxygen evolution is equally important, and its absence weakens the overall impact of the findings.
Limited DFT analysis
The DFT calculations, while providing some insight into the interfacial bonding, are not extensive enough to fully explain the observed Z-scheme mechanism. More detailed calculations, including simulations of charge transfer dynamics, would strengthen the mechanistic understanding.
Rating Explanation
This paper presents a well-designed Z-scheme photocatalyst with a high hydrogen evolution rate. The characterization is thorough, and the proposed mechanism is plausible. However, limitations regarding long-term stability, cost analysis, oxygen evolution discussion, and the depth of DFT calculations prevent a higher rating.
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Original Title:
Interfacial chemical bond and internal electric field modulated Z-scheme Sv-ZnIn2S4/MoSe2 photocatalyst for efficient hydrogen evolution
File Name:
s41467-021-24511-z.pdf
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File Size:
3.99 MB
Uploaded:
July 14, 2025 at 10:35 AM
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