Rapid electron transfer via dynamic coordinative interaction boosts quantum efficiency for photocatalytic CO₂ reduction.

ABSTRACT: The fulfillment of a high quantum efficiency for photocatalytic CO₂ reduction presents a key challenge, which can be overcome by developing strategies for dynamic attachment between photosensitizer and catalyst. In this context, we exploit the use of coordinate bond to connect a pyridine-appended iridium photosensitizer and molecular catalysts for CO₂ reduction, which is systematically demonstrated by ¹H nuclear magnetic resonance titration, theoretical calculations, and spectroscopic measurements. The mechanistic investigations reveal that the coordinative interaction between the photosensitizer and an unmodified cobalt phthalocyanine significantly accelerates the electron transfer and thus realizes a remarkable quantum efficiency of 10.2% ± 0.5% at 450 nm

SUBMITTER: Wang JW 

PROVIDER: S-EPMC8277789 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature