Construction of core-shell MOF@hydroxide hybrids with strong hetero-interface interaction for photocatalytic hydrogen evolution

Metal-organic framework (MOF)-based photocatalysts enabling the separation of photo-generated electron-holes pairs for efficient photocatalytic hydrogen production have been the focus of considerable attention lately as a solution to reduce energy related problems. In this study, the Ni2+ etching of a typical Ti-based MOF(NH2-MIL-125) to synthesize a defective NH2-MIL-125@Ni (OH)(2) photocatalyst is reported. Ni2+ was selected to hydrolyze and etch the NH2-MIL-125 to obtain defective NH2-MIL-125@Ni (OH)(2) was a strong hetero-interface interaction heterojunction, while maintaining the NH2-MIL-125 structure. The construction of defects increased the number of active sites, and the Ni (OH)(2) cocatalyst further enhanced the photogenerated electron-holes separation efficiency. Under visible light for a duration of 4 h, H-2 production reached a rate of 502.32 mmol g(-1). (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

Metal-organic framework (MOF)-based photocatalysts have gained attention as a solution to reduce energy-related problems. In this study, a defective NH2-MIL-125@Ni (OH)(2) photocatalyst was synthesized by etching the NH2-MIL-125 with Ni2+. The introduction of defects increased the number of active sites, and the Ni (OH)(2) cocatalyst enhanced the separation efficiency of photo-generated electron-hole pairs. Under visible light for 4 hours, the H-2 production rate reached 502.32 mmol g(-1).