Adjusting inter-semiconductor barrier height via crystal plane engineering: Crystalline face exposed single crystal cadmium sulfide augmentative S-scheme heterojunctions for efficiently photocatalytic hydrogen production

IF 21.1 1区化学 Q1 CHEMISTRY, PHYSICAL

Applied Catalysis B: Environmental Pub Date : 2023-10-08 DOI:10.1016/j.apcatb.2023.123373

Xuanpu Wang, Zhiliang Jin

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引用次数: 1

Abstract

The design of crystalline face engineered photocatalysts can modulate the catalytic activity at the microscopic scale. The exposure ratio of (100), (002) and (101) crystal planes of CdS with visible light activity was adjusted by crystal plane engineering. Density functional theory (DFT) calculations and experiments show that the fully exposed (002) surface CdS-L (Leaf-like CdS) has excellent hydrogen evolution activity. The use of the interface heterojunction strategy can greatly mobilize the electron flow between CdS-L and CoS₂ S-scheme heterojunction compound semiconductors by changing the potential barrier difference. The CoS₂/CdS-L composite photocatalyst exhibits amazing hydrogen evolution activity under 5 W white light irradiation, and the hydrogen production rate can reach 19.22 mmol·g⁻¹·h⁻¹. The results of in situ radiation XPS tests and comparative experiments show that the catalysts with more exposed crystal planes on the basis of constructing S-scheme heterojunctions can provide more active sites and have stronger reactivity. The use of crystal facet engineering effect and interfacial heterojunction strategy lays the foundation for the structural design and large-scale application of highly active visible light catalysts.

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通过晶面工程调整半导体间势垒高度：晶面暴露单晶硫化镉增强S型异质结用于高效光催化制氢

晶面工程光催化剂的设计可以在微观尺度上调节催化活性。采用晶面工程方法调整了具有可见光活性的CdS的（100）、（002）和（101）晶面的曝光率。密度泛函理论（DFT）计算和实验表明，完全暴露的（002）表面CdS-L（类叶CdS）具有优异的析氢活性。界面异质结策略的使用可以通过改变势垒差，极大地调动CdS-L和CoS2 S方案异质结化合物半导体之间的电子流。CoS2/CdS-L复合光催化剂在5W白光照射下表现出惊人的析氢活性，产氢率可达19.22 mmol·g−1·h−1。原位辐射XPS测试和对比实验结果表明，在构建S型异质结的基础上，具有更多暴露晶面的催化剂可以提供更多的活性位点，并具有更强的反应活性。晶面工程效应和界面异质结策略的使用为高活性可见光催化剂的结构设计和大规模应用奠定了基础。

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来源期刊

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.