Pt4Pd-MgF2/2d-CdS：双位点增强光催化析氢水裂解

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-07-09 DOI:10.1016/j.ijhydene.2025.150398

Yihui Zhang , Miao Fa , Liuying Xiong , Yangbo Ma , Wei Chen , Xiying Li , Shuaishuai Zhou , Liqun Mao

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引用次数: 0

摘要

硫化镉（cd）作为可见光驱动的水裂解制氢光催化剂已被广泛研究。然而，它的实际应用受到光生载流子快速重组的阻碍。为了解决这一限制，本研究开发了Pt4Pd/MgF2/ cd。采用XRD、HRTEM和XPS对合成的1.5% -Pt4Pd/MgF2/CdS进行了结构表征，结果表明MgF2和Pt4Pd均匀分布在2D-CdS表面。然后，对Pt4Pd/MgF2/CdS的光催化性能进行了测试，结果表明，1.5% -Pt4Pd/MgF2/CdS具有较高的活性和稳定性，产氢速率为75 mmol/h/g。根据测量结果（UV-Vis /PL/ESR/功函数），我们提出光催化效率的提高归因于：1)MgF2抑制CdS的光腐蚀而不影响光吸收；2) MgF2表面丰富的Lewis酸位点有利于2D-CdS传导带电子的转移；3)将Pt4Pd合金加载到CdS表面形成肖特基势垒，促进光生载流子的分离。

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Pt4Pd–MgF2/2d-CdS: Dual-site enhanced photocatalytic water splitting for hydrogen evolution

Cadmium sulfide (CdS), as visible-light driven photocatalysts for water splitting to produce hydrogen, has been extensively investigated. However, its practical application is hindered by the rapid recombination of photogenerated carriers. To address this limitation, Pt₄Pd/MgF₂/CdS was developed in this study. The structure of the synthesized 1.5 %-Pt₄Pd/MgF₂/CdS was characterized by XRD, HRTEM, and XPS, the results showed that both MgF₂ and Pt₄Pd uniformly distributed on the surface of 2D-CdS. Then, the photocatalytic performance of Pt₄Pd/MgF₂/CdS was tested, and the results demonstrated that 1.5 %-Pt₄Pd/MgF₂/CdS exhibits high activity and stability, with a hydrogen production rate of 75 mmol/h/g. Based on measurements results (UV–Vis/PL/ESR/work function), we propose that the increase of photocatalytic efficiency atributed to: 1) MgF₂ inhibits the photocorrosion of CdS without affecting light absorption; 2) the abundant Lewis acid sites on the MgF₂ surface facilitate the transfer of conduction band electrons from 2D-CdS; 3) the loading of Pt₄Pd alloy onto the CdS surface forms a Schottky barrier, which promotes the separation of photogenerated charge carriers.

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.