journal article·2024-08

Tuning Electrons Migration of Dual S Defects Mediated MoS2‐x/ZnIn2S4‐x Toward Highly Efficient Photocatalytic Hydrogen Production

Yifan Zheng, Yu Wang, Seemal Mansoor, Zixu Hu, Yuxin Zhang, Yongdi Liu, Liang Zhou, Juying Lei, Jinlong Zhang

Small· Volume 20· Issue 33
Publisher page

Abstract

Abstract Photocatalytic hydrogen production is a prevalent method for hydrogen synthesis. However, high recombination rate of photogenerated carriers and high activation energy barrier of H remain persistent challenge. Here, the two‐step hydrothermal method is utilized to prepare dual S‐defect mediated catalyst molybdenum sulfide/zinc indium sulfide (MSv/ZISv), which has high hydrogen production rate of 8.83 mmol g−1h−1 under simulated sunlight. The achieved rate is 21.91 times higher than pure ZnIn2S4 substrate. Defects in ZIS within MSv/ZISv modify the primitive electronic structure by creating defect state that retaining good reducing power, leading to the rapid separation of electron‐hole pairs and the generation of additional photogenerated carriers. The internal electric field further enhances the migration toward to cocatalyst. Simultaneously, the defects introduced on the MoS2 cause electron rearrangement, leading to electron clustering on both S vacancies and edge S. Thereby MSv/ZISv exhibits the lowest activation energy barrier and |ΔGH*|. This work explores the division of synergies between different types of S defects, providing new insights into the coupling of defect engineering.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Advanced Photocatalysis Techniques · Electrocatalysts for Energy Conversion · MXene and MAX Phase Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Shanghai Engineering Research Center for Multi‐media Environmental Catalysis and Resource Utilization East China University of Science and Technology 130 Meilong Road Shanghai 200237 P. R. China

Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research Center School of Chemistry and Molecular Engineering East China University of Science and Technology 130 Meilong Road Shanghai 200237 P. R. China

National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery School of Resources and Environmental Engineering East China University of Science and Technology 130 Meilong Road Shanghai 200237 P. R. China

Department of Molecular Engineering Kyoto University Kyoto‐Daigaku Katsura, Nishikyo‐ku Kyoto 615‐8510 Japan

Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092 P. R. China

State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150090 P. R. China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Science and Technology Commission of Shanghai Municipality · Fundamental Research Funds for the Central Universities

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