摘要
Efficient CO_(2)photoreduction to produce fuel remains a great challenge,due to the fast recombination of photogenerated charge carriers and the lack of effective reactive sites in the developed photocatalysts.Herein,single Co atoms(Co_(SA))were highly dispersed on hydrothermally synthesized BiOCl nanosheets(BOC)by a facile two-step electrostatic self-assembly and pyrolysis method.The obtained Co_(SA)-BOC could be performed for efficient CO_(2)photoreduction to stoichiometrically produce CO and O_(2)at the ratio of 2:1,with the CO evolution rate reaching 45.93 μmol g^(-1)h^(-1),~4 times that of the pristine BOC.This distinctly improved photocatalytic performance for Co_(SA)-BOC should benefit from the introduction of atomically dispersed Co–O_(4)coordination structures,which could accelerate the migration of photogenerated charge carriers to surface by creating an impurity energy level in the forbidden band,and act as the reactive sites to deliver the photogenerated electrons to activate CO_(2)molecules for CO production.This work provides a facile and reliable strategy to highly disperse single atoms on low-dimensional semiconductors for efficient CO_(2)photoreduction to selectively produce CO.
基金
the National Natural Science Foundation of China(52225606,52488201)
the"Fundamental Research Funds for the Central Universities".
