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

Abstract

Defective metal-organic frameworks (MOFs) materials have ignited intensive attention in the field of photocatalytic H2 evolution. In this work, we applied a defect-engineering strategy to construct intrinsic defects in Cu-MOF, 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.