Time‐Resolved Control of MOF‐Nanoparticle Heterojunctions for Crystal Composites with Tailorable Photocatalytic Performance

Abstract The structural and compositional diversification of Metal‐Organic Frameworks (MOFs) continues to grow, along with the opportunities they offer in H₂ photoevolution or CO₂ photoreduction. This often requires the use of metal co‐catalysts for improving the efficiency and selectivity of the reaction. However, most studies often overlook how the integration of these two components can be used to tailor the photocatalytic performance of a given framework. Taking advantage of a new synthetic methodology that allows the growth of titanium‐based MUV‐10 crystals through continuous injection of its components, here it is demonstrated how the time‐resolved injection of Pt nanoparticles (NPs) at different stages of crystal growth results in tunable MOF/Pt heterojunctions with varying photocatalytic efficiencies, which can be used to boost performance by up to 2.5 times depending on the injection time.