Photoexcited singlet enhanced oxygen reduction reaction with high selectivity on the photosensitizer/layered double hydroxides nanocomposite  

作　　者：Beibei Yang Sheng Tao Xuefei Liu Jun Lu 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China [2]Tianjin University,Tianjin 300072,China

出　　处：《Nano Research》2023年第4期5938-5945,共8页纳米研究（英文版）

基　　金：the financial support from the Major State Basic Research Development Program of China(973 Program)(No.2014CB932101);the National Natural Science Foundation of China(Nos.21571013 and 52073023);Program for Chang Jiang Scholars and Innovative Research Team in University(No.IRT1205).

摘　　要：Oxygen reduction reaction(ORR)plays a pivotal role in advanced electrochemical energy conversion devices.However,the ORR conversion efficiency is extremely limited.The major obstacles originate from the adsorption and activation of O_(2)on the electrode surface.A novel nanocomposite catalyst,photosensitizers(PS)meso-tetraphenylporphyrin iron(III)chloride(FePcCl)/NiCoFe-layered double hydroxides(NiCoFe-LDHs)is designed in this study.Herein,owing to excellent oxygen molecules activation ability and remarkable illumination absorption feature,FePcCl/NiCoFe-LDHs is employed to uncover the relationship between the intrinsic ORR activity and PS behaviour.Interestingly,the reaction mechanism of singlet 1O_(2)is proposed owing to the combination of electrochemical ORR catalysed via LDHs and PS.The boosted cathodic ORR properties exhibit singlet 1O_(2)dependent response arising from the synergistic effect to selectively produce active intermediates in alkaline medium.This work imparts the promising new mechanism about the high 4-electron ORR selectivity via material design,which will guide the development of photo-assisted energy conversion devices.

关 键 词：oxygen reduction reaction singlet 1O_(2) PHOTOSENSITIZERS photo-assisted energy conversion layered double hydroxides 

分 类 号：O64[理学—物理化学]