The BiVO_(4)photoanode holds a significant competitive edge for industrialization due to its high theoretical photocurrent density and solar-to-hydrogen conversion efficiency but is challenged by poor reaction kinetic...The BiVO_(4)photoanode holds a significant competitive edge for industrialization due to its high theoretical photocurrent density and solar-to-hydrogen conversion efficiency but is challenged by poor reaction kinetics and stability.Here,a conformal and superhydrophilic layer of phytic acid coordinated with nickel and iron(PA-NiFe)was in situ deposited on the surface of the BiVO_(4)photoanode via a facile interfacial coordination assembly strategy.The BiVO_(4)@PA-NiFe photoanode achieved a high photocurrent density of 4.58 mA cm^(−2)and a surface charge separation efficiency of 84.5%,which are 3.23 and 1.91 times higher than those of the pristine BiVO_(4)photoanode,respectively.Moreover,the BiVO_(4)@PA-NiFe photoanode exhibited excellent durability during a 6-hour stability assessment.The enhanced surface charge separation and the improved potential-limiting step during the oxygen evolution reaction contribute to improved photoelectrochemical performances.This work underscores a competitive strategy for developing metal–organic complexes to advance the development of efficient photoanodes.展开更多
基金supported by the National Natural Science Foundation of China(22302151 and 22301228)Natural Science Foundation of Hubei Province(2024AFB267).
文摘The BiVO_(4)photoanode holds a significant competitive edge for industrialization due to its high theoretical photocurrent density and solar-to-hydrogen conversion efficiency but is challenged by poor reaction kinetics and stability.Here,a conformal and superhydrophilic layer of phytic acid coordinated with nickel and iron(PA-NiFe)was in situ deposited on the surface of the BiVO_(4)photoanode via a facile interfacial coordination assembly strategy.The BiVO_(4)@PA-NiFe photoanode achieved a high photocurrent density of 4.58 mA cm^(−2)and a surface charge separation efficiency of 84.5%,which are 3.23 and 1.91 times higher than those of the pristine BiVO_(4)photoanode,respectively.Moreover,the BiVO_(4)@PA-NiFe photoanode exhibited excellent durability during a 6-hour stability assessment.The enhanced surface charge separation and the improved potential-limiting step during the oxygen evolution reaction contribute to improved photoelectrochemical performances.This work underscores a competitive strategy for developing metal–organic complexes to advance the development of efficient photoanodes.
