posted on 2021-12-05, 12:13authored byShanshan Fu, Shuang Yao, Song Guo, Guang-Chen Guo, Wenjuan Yuan, Tong-Bu Lu, Zhi-Ming Zhang
Solar-driven
carbonylation with CO2 replacing toxic
CO as a C1 source is of considerable interest; however it remains
a great challenge due to the inert CO2 molecule. Herein,
we integrate cobalt single-site and ultrafine CuPd nanocluster catalysts
into a porphyrin-based metal–organic framework to construct
composite photocatalysts (Cu1Pd2)z@PCN-222(Co) (z = 1.3, 2.0, and
3.0 nm). Upon visible light irradiation, excited porphyrin can concurrently
transfer electrons to Co single sites and CuPd nanoclusters, providing
the possibility for coupling CO2 photoreduction and Suzuki/Sonogashira
reactions. This multicomponent synergy in (Cu1Pd2)1.3@PCN-222(Co) can not only replace dangerous CO gas
but also dramatically promote the photosynthesis of benzophenone in
CO2 with over 90% yield and 97% selectivity under mild
condition. Systematic investigations clearly decipher the function
and collaboration among different components in these composite catalysts,
highlighting a new insight into developing a sustainable protocol
for carbonylation reactions by employing greenhouse gas CO2 as a C1 source.