Atomic interfacial charge and energy transfer paths at MoS2/Pd bonded defect-rich BiOCl interfaces for efficient photocatalysis

IF 20.2 1区 化学 Q1 CHEMISTRY, PHYSICAL
Bingjie Sun , Cheng Huang , Chenyu Yang , Da Ke , Ye Liu , Qi Lu , Xiufan Liu , Xuyang Xiong , Yuanzhen Chen , Qingqing Jiang , Juncheng Hu , Tengfei Zhou
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引用次数: 0

Abstract

Construction of heterogeneous transmission interfaces that spatially separate Coulomb-bound electron-hole pairs in semiconductors allows exceptional control over optoelectronic properties, thereby enhancing the efficiency of solar energy conversion. In this study, we propose an effective photocatalyst for full water splitting named MS/BOC-x/Pd, comprising atomic layer of MoS2 bonded to defect-rich BiOCl, and a non-plasmonic Pd oxidation co-catalyst is exclusively assembled on the sides to form a strong electronic coupling and maximize the trapping of holes. The presence of the Mo-S-Bi motif promotes rapid charge migration, resulting in impressive rates of H2 and O2 formation (165 and 9.17 μmol g−1 h−1, respectively), without the requirement of sacrificial agents or sensitizers. Through experimental and theoretical investigations, we discovered that the occupation of sulfur atoms in oxygen vacancies extends the overlap of surface charges, thereby facilitating the separation of inner/interfacial electron-hole pairs. The Mo-S-Bi bond provides directional guidance for charge transfer to the surface redox sites. These findings provide valuable insights for the future design of highly efficient photocatalysts for solar energy conversions.

Abstract Image

用于高效光催化的 MoS2/Pd 键合富含缺陷的 BiOCl 表面的原子间电荷和能量转移路径
在半导体中构建异质传输界面,在空间上分离库仑结合的电子-空穴对,可实现对光电特性的特殊控制,从而提高太阳能转换的效率。在这项研究中,我们提出了一种有效的全水分离光催化剂,命名为 MS/BOC-x/Pd,它由原子层 MoS2 与富含缺陷的 BiOCl 结合而成,并在两侧专门装配了非等离子体 Pd 氧化辅助催化剂,以形成强电子耦合,最大限度地捕获空穴。Mo-S-Bi图案的存在促进了电荷的快速迁移,从而在不需要牺牲剂或敏化剂的情况下实现了惊人的 H2 和 O2 生成速率(分别为 165 和 9.17 μmol g-1 h-1)。通过实验和理论研究,我们发现氧空位中硫原子的占据扩大了表面电荷的重叠,从而促进了内部/界面电子-空穴对的分离。Mo-S-Bi 键为电荷转移到表面氧化还原位点提供了方向性指导。这些发现为未来设计用于太阳能转换的高效光催化剂提供了宝贵的启示。
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来源期刊
Applied Catalysis B: Environmental
Applied Catalysis B: Environmental 环境科学-工程:化工
CiteScore
38.60
自引率
6.30%
发文量
1117
审稿时长
24 days
期刊介绍: Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including: 1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources. 2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes. 3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts. 4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells. 5.Catalytic reactions that convert wastes into useful products. 6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts. 7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems. 8.New catalytic combustion technologies and catalysts. 9.New catalytic non-enzymatic transformations of biomass components. The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.
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