Constructing a 2D Heterointerface of MoS2/MnIn2S4 with Improved Interfacial Charge Carrier Transfer for Photocatalytic H2O2 Production

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2025-02-24 DOI:10.1021/acsaem.4c0329610.1021/acsaem.4c03296

Uttam Kumar, Emmanuel Picheau, Huanran Li, Zihan Zhang, Takayuki Kikuchi, Indrajit Sinha* and Renzhi Ma*,

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引用次数: 0

Abstract

Photocatalytic oxygen reduction to H₂O₂ is a promising sustainable solar fuel production pathway. Photocatalysts with heterostructure interfaces can suppress charge carrier recombination and endow photogenerated electrons and holes with improved redox potentials. This study develops a heterostructured two-dimensional (2D) MoS₂/MnIn₂S₄ photocatalyst for photocatalytic H₂O₂ production. The photocatalyst with an optimal loading of MnIn₂S₄ on 2D MoS₂ nanosheets demonstrates the maximum H₂O₂ production rate of 606.7 μmol g^–1 h^–1, approximately 4.2 and 5 times higher than pristine 2D MoS₂ and MnIn₂S₄, respectively. The synergistic interaction between 2D MoS₂ nanosheets and MnIn₂S₄ results in enhanced charge separation, optical absorption, stability, and recyclability. Reaction pathway studies reveal that H₂O₂ production is through a sequential single-electron O₂ reduction reaction by accumulated photogenerated electrons on the conduction band of the 2D MoS₂/MnIn₂S₄ heterostructure. This work presents a noble-metal-free photocatalyst responsive to visible light for solar H₂O₂ generation.

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光催化氧还原为 H2O2 是一种前景广阔的可持续太阳能燃料生产途径。具有异质结构界面的光催化剂可以抑制电荷载流子重组，并赋予光生电子和空穴更好的氧化还原电位。本研究开发了一种用于光催化生产 H2O2 的异质结构二维 (2D) MoS2/MnIn2S4 光催化剂。在二维 MoS2 纳米片上最佳负载 MnIn2S4 的光催化剂的 H2O2 生成率最高可达 606.7 μmol g-1 h-1，分别是原始二维 MoS2 和 MnIn2S4 的 4.2 倍和 5 倍。二维 MoS2 纳米片与 MnIn2S4 之间的协同作用增强了电荷分离、光吸收、稳定性和可回收性。反应路径研究表明，H2O2 的产生是通过二维 MoS2/MnIn2S4 异质结构导带上累积的光生电子进行的单电子顺序 O2 还原反应实现的。这项研究成果提出了一种不含惰性金属的光催化剂，它能对可见光做出反应，用于太阳能 H2O2 生成。

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.