Transition metal coordination polymers are emerging as attractive heterogeneous catalysts for lightdriven CO_(2) reduction.Various coordination polymers have been investigated in photocatalytic CO_(2) reduction.Howeve...Transition metal coordination polymers are emerging as attractive heterogeneous catalysts for lightdriven CO_(2) reduction.Various coordination polymers have been investigated in photocatalytic CO_(2) reduction.However,it is challenging to develop robust and non-precious metal-based coordination polymers for CO_(2) reduction.Moreover,photoinduced morphological transformation of a coordination polymer has yet to be unveiled in optimizing photocatalytic performance.Herein,we report a selfassembled Fe(Ⅱ)coordination polymer for high-performance photoreduction of CO_(2) to CO.This coordination polymer undergoes photoinduced morphological transformation from nanoplate to nanosphere during photocatalysis,resulting in uncommon self-enhancing photocatalysis.After five cycles of reaction,CO is generated with a high yield of 180 mmol g^(-1) and selectivity of 99.4% in water-containing media.The apparent quantum yield for CO generation is found to be as high as 11.7%at 420 nm.Detailed photoelectrochemical studies demonstrate that nanospheres of the iron(Ⅱ)coordination polymer show more exposed active sites and more efficient charge separation and transfer,which is responsible for the selfenhancing photocatalysis.This work presents a robust photocatalytic system for CO_(2) reduction and also provides unique insight into the morphological transformation of a coordination polymer-based heterogeneous catalyst in photocatalytic CO_(2) reduction.展开更多
基金supported by the Scientific Research Fund of Zhejiang Provincial Education Department(Y202146152)the Graduate Student Scientific Research and Innovation Project of Ningbo University(IF2023021).
文摘Transition metal coordination polymers are emerging as attractive heterogeneous catalysts for lightdriven CO_(2) reduction.Various coordination polymers have been investigated in photocatalytic CO_(2) reduction.However,it is challenging to develop robust and non-precious metal-based coordination polymers for CO_(2) reduction.Moreover,photoinduced morphological transformation of a coordination polymer has yet to be unveiled in optimizing photocatalytic performance.Herein,we report a selfassembled Fe(Ⅱ)coordination polymer for high-performance photoreduction of CO_(2) to CO.This coordination polymer undergoes photoinduced morphological transformation from nanoplate to nanosphere during photocatalysis,resulting in uncommon self-enhancing photocatalysis.After five cycles of reaction,CO is generated with a high yield of 180 mmol g^(-1) and selectivity of 99.4% in water-containing media.The apparent quantum yield for CO generation is found to be as high as 11.7%at 420 nm.Detailed photoelectrochemical studies demonstrate that nanospheres of the iron(Ⅱ)coordination polymer show more exposed active sites and more efficient charge separation and transfer,which is responsible for the selfenhancing photocatalysis.This work presents a robust photocatalytic system for CO_(2) reduction and also provides unique insight into the morphological transformation of a coordination polymer-based heterogeneous catalyst in photocatalytic CO_(2) reduction.
