Boosting Photocatalytic Hydrogen Production over Mn0.4Cd0.6S/CuS p–n Heterojunction under Visible Light Irradiation

IF 3.6 4区工程技术 Q3 ENERGY & FUELS

Energy technology Pub Date : 2025-01-16 DOI:10.1002/ente.202401858

Yueqin Zhao, Yuxin Sun, Liuyun Chen, Xianjun Yang, Pengfei Yang, Xinling Xie, Zuzeng Qin, Hongbing Ji, Tongming Su

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引用次数: 0

Abstract

Photocatalytic hydrogen production from water splitting is a promising technology for overcoming energy and environmental issues. Herein, Mn_0.4Cd_0.6S/CuS composites were constructed for photocatalytic hydrogen production. The amount of CuS is optimized, and the composition and structure of the Mn_0.4Cd_0.6S/CuS composite are investigated via various characterization techniques. The formation of a p–n heterojunction between Mn_0.4Cd_0.6S and CuS and the built-in electric field improve the separation efficiency of photogenerated electrons and holes and enhance the performance of photocatalytic hydrogen production. When the content of CuS is 5 wt%, Mn_0.4Cd_0.6S/5CuS presents the best photocatalytic hydrogen production rate of 22.10 mmol h⁻¹ g⁻¹, which is 3.0 times greater than that of Mn_0.4Cd_0.6S, and the apparent quantum yield reaches 7.82% at 400 nm. Combined with the activity test and characterization results, the reaction mechanism of photocatalytic hydrogen production over the Mn_0.4Cd_0.6S/CuS composite is proposed.

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可见光下促进Mn0.4Cd0.6S/ cu p-n异质结光催化制氢

光催化水裂解制氢是一种很有前途的技术，可以解决能源和环境问题。本文构建了用于光催化制氢的Mn0.4Cd0.6S/ cu复合材料。优化了cu的用量，并通过各种表征技术研究了Mn0.4Cd0.6S/ cu复合材料的组成和结构。Mn0.4Cd0.6S与cu之间形成p-n异质结，外加电场提高了光生电子与空穴的分离效率，提高了光催化制氢性能。当cu含量为5 wt%时，Mn0.4Cd0.6S/ 5cu的最佳光催化产氢速率为22.10 mmol h−1 g−1，是Mn0.4Cd0.6S的3.0倍，在400 nm处的表观量子产率达到7.82%。结合活性测试和表征结果，提出了Mn0.4Cd0.6S/ cu复合材料光催化制氢的反应机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Energy technology ENERGY & FUELS-

CiteScore

7.00

自引率

5.30%

发文量

审稿时长

1.3 months

期刊介绍： Energy Technology provides a forum for researchers and engineers from all relevant disciplines concerned with the generation, conversion, storage, and distribution of energy. This new journal shall publish articles covering all technical aspects of energy process engineering from different perspectives, e.g., new concepts of energy generation and conversion; design, operation, control, and optimization of processes for energy generation (e.g., carbon capture) and conversion of energy carriers; improvement of existing processes; combination of single components to systems for energy generation; design of systems for energy storage; production processes of fuels, e.g., hydrogen, electricity, petroleum, biobased fuels; concepts and design of devices for energy distribution.