Sep 2026· Small· pp.
e75561
· 0 citations· 40 references
Medicine
Abstract
The photocatalytic hydrogen evolution (PHE) is a crucial technique for converting solar energy into green hydrogen. However, the PHE efficiency remains limited by metal-acid site spacing. In this study, we present a lattice-strain strategy to precisely control the distance between the metal and acid site by doping rare-earth Ho atoms onto a ZnIn2S4 nanosheet. Ho-doped ZnIn2S4 exhibits a hydrogen evolution rate of 1865.49 µmol g-1 h-1 under visible light, approximately 2.4 times that of the pure sample, with an apparent quantum efficiency of 14.7% at 420 nm. This performance is attributed to precise control of the distance between metal and acid sites via tensile strain induced by Ho, resulting in greatly improved charge-transfer capability and reduced energy barrier of the reaction. This work provides new insights into the design of highly efficient photocatalysts via strain engineering, revealing the role of the metal-acid site distance as a crucial structural parameter in the synergistic regulation of charge dynamics and the thermodynamics of hydrogen evolution.
The production of green hydrogen (H2) is a sustainable strategy to address the current energy crisis without contributing to long-term greenhouse gas emissions. Many powder-based photocatalysts have shown great promise for light-driven H2 generation; however, in either bulk or nanostructured powder form they suffer fro...
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Photocatalytic hydrogen production represents a promising strategy for the sustainable conversion of solar energy into chemical fuels, yet its efficiency is often limited by rapid charge recombination and narrow light absorption. To address these challenges, an all-solid-state Z-scheme ZnIn2S4/reduced graphene oxide/...
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Covalent organic frameworks (COFs) have attracted much attention for their potential in photocatalytic hydrogen peroxide (H2O2) production. However, traditional COFs often suffer from sluggish charge transfer kinetics and a lack of highly electron-localized sites for O2 adsorption, leading to inefficient photocatalytic...
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