Photoelectrochemical(PEC)hydrogen production from water splitting is a green technology to convert solar energy into renewable hydrogen fuel.The construction of host/guest architecture in semiconductor photoanodes has been proven to be an effective strategy to im-prove solar-to-fuel conversion efficiency.In this study,WO3@Fe2O3 core-shell nanoarray hetero-junction photoanodes are synthesized from the in-situ decomposition of WO3@Prussian blue(WO3@PB)and then used as host/guest photoanodes for photoelectrochemical water splitting,during which Fe2O3 serves as guest material to absorb visible solar light and WO3can act as host scaffolds to collect electrons at the contact.The prepared WO3@Fe2O3 shows the en-hanced photocurrent density of 1.26 mA cm-2(under visible light)at 1.23 V.vs RHE and a superior IPEC of 24.4％at 350 nm,which is higher than that of WO3@PB and pure WO3(0.43 mA/cm.2 and 16.3％,0.18 mA/cm.2and 11.5％)respectively,owing to the efficient light-harvest-ing from Fe2O3 and the enhanced electron-hole pairs separation from the formation of type-ll heterojunctions,and the direct and ordered charge transport channels from the one-dimensional(1D)WO3 nanoarray nanostructures.Therefore,this work provides an alternative insight into the construction of sustainable and cost-effective photoanodes to enhance the efficiency of the solar-driven water splitting.

Guobing Mao;Heng Wu;Tianyang Qiu;Dingjie Bao;Longjie Lai;Wenguang Tu;Qi Liu

School of Materials Science and Engineering,Anhui Polytechnic University,Wuhu,Anhui 241000,China;School of Mechanical Engineering,Anhui Institute of Information Technology,Wuhu,Anhui 241100,China;Key Laboratory of Modern Acoustics(MOE),Institute of Acoustics,School of Physics,Eco-materials and Renewable Energy Research Center(ERERC),National Laboratory of Solid State Microstructures,Collaborative Innovation Center of Advanced Microstructures,Jiangsu Key Laboratory for Nano Tech-nology,Nanjing University,Nanjing 210093,China;School of Science and Engineering,The Chinese University of Hong Kong,Shenzhen,Guangdong 518172,China

结构化学

[1]Guobing Mao;Heng Wu;Tianyang Qiu;Dingjie Bao;Longjie Lai;Wenguang Tu;Qi Liu-.WO3@Fe2O3 Core-Shell Heterojunction Photoanodes for Efficient Photoelectrochemical Water Splitting)[J].结构化学,2022(08):25-30

Photoanodes,WO3can,2and

Fe2O3,Core,Shell,Heterojunction,Efficient,Photoelectrochemical,Water,Splitting,hydrogen,production,from,water,splitting,green,technology,convert,solar,energy,into,renewable,fuel,construction,host,guest,architecture,semiconductor,photoanodes,has,been,proven,effective,strategy,conversion,efficiency,In,this,study,core,shell,nanoarray,synthesized,situ,decomposition,Prussian,blue,PB,then,used,photoelectrochemical,during,which,serves,material,absorb,visible,light,scaffolds,collect,electrons,contact,prepared,shows,photocurrent,density,mA,under,RHE,superior,IPEC,higher,than,that,pure,respectively,owing,efficient,harvest,enhanced,hole,pairs,separation,formation,type,heterojunctions,direct,ordered,charge,transport,channels,one,dimensional,1D,nanostructures,Therefore,work,provides,alternative,insight,sustainable,cost,driven

0.518346