Linker Engineering of Sandwich-Structured Metal-Organic Framework Composites for Optimized Photocatalytic H Production.

While the microenvironment around catalytic sites is recognized to be crucial in thermocatalysis, its roles in photocatalysis remain subtle. In this work, a series of sandwich-structured metal-organic framework (MOF) composites, UiO-66-NH @Pt@UiO-66-X (X means functional groups), is rationally constructed for visible-light photocatalytic H production. By varying the ─X groups of the UiO-66-X shell, the microenvironment of the Pt sites and photosensitive UiO-66-NH core can be simultaneously modulated.