Molybdenum-modified ZnIn2S4 with Bifunctional Cocatalyst for Efficient Photocatalytic Overall Water Splitting under Simulated Sunlight

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-04-01 DOI:10.1039/d5dt00316d

Yutong Chen, Rong Wu, Guoan Lin, Jianyong Yue, Dezheng Kong, Chen Zhang, Shunhang Wei, Xiaoxiang Xu

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Abstract

Photocatalytic overall water splitting (POWS) was a promising technique for sustainable hydrogen provision that could potentially tackle the current energy and environmental challenges. As a visible-light-active photocatalyst, ZnIn2S4 was an ideal candidate for POWS yet was characterized with a low efficiency due to poor charge separation and improper surface reactions. Here, ZnIn2S4 was modified by doping Mo and depositing with bifunctional cocatalyst for efficient POWS under sunlight. Charge separation and photodeposition of Pt and CrOx was accelerated by Mo introduction to promote surface POWS reactions and suppress reverse reactions. Under simulated sunlight irradiation, the modified ZnIn2S4 achieved POWS with an apparent quantum efficiency (AQE) of 0.17% at 420  20 nm and a solar-to-hydrogen (STH) conversion efficiency of 0.016%. Theoretical calculations indicated that Mo dopants introduced spin-polarized states at both conduction band bottom and valence band top, being spin-forbidden for charge recombination. This study served as a useful guideline for the design and development of efficient photocataysts for sunlight-driven POWS.

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.