The tailor-made oxygen evolution catalysts(OECs)paired with photoanodes offer a path to promote water oxidation kinetics;however,the unsatisfied interface between OECs and photoanode sets a barrier for efficient charg...The tailor-made oxygen evolution catalysts(OECs)paired with photoanodes offer a path to promote water oxidation kinetics;however,the unsatisfied interface between OECs and photoanode sets a barrier for efficient charge transfer.Herein,a graphene oxide(GO)layer to promote the charge transfer from BiVO_(4)(BVO)to NiOOH OEC is reported.It is found that GO layer inserted between BVO and NiOOH can not only serve as hole extraction layer due to its hole storage capability,but also improve the stability.Finally,the rationally designed NiOOH/GO/BVO photoanode achieves a photocurrent density of 3.81 mA·cm^(-2)at 1.23 V(vs.reversible hydrogen electrode(RHE)),which is 3.85 times as high as that of bare BVO.This work opens up low-cost auxiliary materials for enhancing photoelectrochemical water splitting.展开更多
基金financially supported by the National Natural Science Foundation of China(No.22172077)the Natural Science Foundation of Jiangsu Province of China(No.BK20211573)+1 种基金Jiangsu International Science and Technology Cooperation Program(No.BZ2020063)the Fundamental Research Funds for the Central Universities(No.30921011216)。
文摘The tailor-made oxygen evolution catalysts(OECs)paired with photoanodes offer a path to promote water oxidation kinetics;however,the unsatisfied interface between OECs and photoanode sets a barrier for efficient charge transfer.Herein,a graphene oxide(GO)layer to promote the charge transfer from BiVO_(4)(BVO)to NiOOH OEC is reported.It is found that GO layer inserted between BVO and NiOOH can not only serve as hole extraction layer due to its hole storage capability,but also improve the stability.Finally,the rationally designed NiOOH/GO/BVO photoanode achieves a photocurrent density of 3.81 mA·cm^(-2)at 1.23 V(vs.reversible hydrogen electrode(RHE)),which is 3.85 times as high as that of bare BVO.This work opens up low-cost auxiliary materials for enhancing photoelectrochemical water splitting.
