Opening catalytic sites in the copper-triazoles framework via defect chemistry for switching on the proton reduction

Defective metal-organic frameworks (MOFs) materials have ignited intensive attention in the field of photocatalytic H-2 evolution. In this work, we applied a defect-engineering strategy to construct intrinsic defects in CuMOF, which gives birth to the excellent photocatalytic ability for proton reduction. Furthermore, the fine characterizations give the exact molecular formula of the defective Cu-MOF (copper-based metal-triazolate material, termed as MET-Cu-D). The intrinsic deficiency, ligand-vacancies of 1H-1,2,3-triazole, is generated in situ during the synthesis process, which triggers the catalytic activity of unsaturated Cu-sites for the outstanding H2 evolution performance. Photocatalysis results indicate that MET-Cu-D exhibited an excellent hydrogen evolution rate of 12.91 mmol g(-1) and catalytic stability. This study provides a new train of thought for the design of defective MOFs to promote the further development of solar-hydrogen fuel.

Automated summary

This study applied a defect-engineering strategy to create intrinsic defects in CuMOF, resulting in the formation of MET-Cu-D material with excellent photocatalytic performance. The fine characterizations provided the exact molecular formula of the defective Cu-MOF, which displayed outstanding H2 evolution performance. The study offers a new approach for the design of defective MOFs, promoting the further development of solar-hydrogen fuel.