Strong interaction effects of non-noble metal oxide Co2SiO4/Mn0.5Cd0.5S Schottky junctions enhance photocatalytic hydrogen evolution

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-01-27 DOI:10.1016/j.apcata.2025.120142

Fei Jin , Peizhen Wang , Zhiliang Jin

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引用次数: 0

Abstract

Precious metal particles are widely used as co-catalysts due to their exceptional photocatalytic properties. However, their high cost and limited availability underscore the urgent need to develop efficient and cost-effective non-precious metal alternatives. In this study, Co₂SiO₄/Mn_0.5Cd_0.5S was synthesized using Co₂SiO₄ as co-catalyst. When the Co₂SiO₄ content was optimized to 15 %, the hydrogen evolution activity reached 11.20 mmol·g⁻¹ ·h⁻¹ , representing a 12-fold enhancement compared to Mn_0.5Cd_0.5S alone. In addition, Co₂SiO₄ significantly enhanced the hydrogen production capability of Mn_0.5Cd_0.5S, outperforming traditional co-catalysts such as Pt and Au. In situ XPS and DFT calculations revealed that the strong electron coupling between Co₂SiO₄ and Mn_0.5Cd_0.5S forms a Schottky junction. This structure facilitates the unidirectional transfer of photoexcited electrons from Mn_0.5Cd_0.5S to Co₂SiO₄ while effectively suppressing electron backflow via the Schottky barrier. This study provides a comprehensive understanding of Schottky junctions and offers valuable insights into the development of non-precious metal-based co-catalysts for hydrogen production.

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.