Solving the issues of interface defects and carrier recombination in Fe_(2)O_(3)photoanodes is of great significance for enhancing their photoelectrochemical water splitting performance.Herein,a semiconductor material...Solving the issues of interface defects and carrier recombination in Fe_(2)O_(3)photoanodes is of great significance for enhancing their photoelectrochemical water splitting performance.Herein,a semiconductor material,MoO_(3),was incorporated in Fe_(2)O_(3)nanorods as a composite photoanode.Compared to pristine Fe_(2)O_(3),the Fe_(2)O_(3)/MoO_(3)-350 photoanode achieved a 3.2-fold increase in photocurrent density by varying the number of impregnations,reaching 1.09 mA cm^(-2)at a bias of 1.23 VRHE under 100 mW cm^(-2)illumination.In the PEC water splitting reaction,the Fe_(2)O_(3)/MoO_(3)-350 photoanode exhibited significantly improved H_(2)and O2 production rates.The experimental results showed that the change in surface state distribution and the positively shifted surface state distribution(N_(ss))center induced by the introduction of MoO_(3)promoted the transfer of photogenerated charges and the kinetics of interfacial water oxidation.Therefore,this study contributes to an in-depth understanding of the influence of interfacial structural regulation on the surface-state distribution and provides a reference for the rational design of photoanode materials.展开更多
基金supported by the open research fund of Songshan Lake Materials Laboratory(2021SLABFK04)Foundation of Innovation Team 2020,Liaoning ProvinceNatural Science Foundation of Liaoning Province(2022-MS-170,2022-BS-108).
文摘Solving the issues of interface defects and carrier recombination in Fe_(2)O_(3)photoanodes is of great significance for enhancing their photoelectrochemical water splitting performance.Herein,a semiconductor material,MoO_(3),was incorporated in Fe_(2)O_(3)nanorods as a composite photoanode.Compared to pristine Fe_(2)O_(3),the Fe_(2)O_(3)/MoO_(3)-350 photoanode achieved a 3.2-fold increase in photocurrent density by varying the number of impregnations,reaching 1.09 mA cm^(-2)at a bias of 1.23 VRHE under 100 mW cm^(-2)illumination.In the PEC water splitting reaction,the Fe_(2)O_(3)/MoO_(3)-350 photoanode exhibited significantly improved H_(2)and O2 production rates.The experimental results showed that the change in surface state distribution and the positively shifted surface state distribution(N_(ss))center induced by the introduction of MoO_(3)promoted the transfer of photogenerated charges and the kinetics of interfacial water oxidation.Therefore,this study contributes to an in-depth understanding of the influence of interfacial structural regulation on the surface-state distribution and provides a reference for the rational design of photoanode materials.
