Bipolar charge collecting structure enables overall water splitting on ferroelectric photocatalysts

Author:

Liu YongORCID,Zhang Mingjian,Wang Zhuan,He Jiandong,Zhang Jie,Ye Sheng,Wang XiuliORCID,Li Dongfeng,Yin Heng,Zhu Qianhong,Jing Huanwang,Weng Yuxiang,Pan FengORCID,Chen Ruotian,Li CanORCID,Fan FengtaoORCID

Abstract

AbstractFerroelectrics are considered excellent photocatalytic candidates for solar fuel production because of the unidirectional charge separation and above-gap photovoltage. Nevertheless, the performance of ferroelectric photocatalysts is often moderate. A few studies showed that these types of photocatalysts could achieve overall water splitting. This paper proposes an approach to fabricating interfacial charge-collecting nanostructures on positive and negative domains of ferroelectric, enabling water splitting in ferroelectric photocatalysts. The present study observes efficient accumulations of photogenerated electrons and holes within their thermalization length (~50 nm) around Au nanoparticles located in the positive and negative domains of a BaTiO3 single crystal. Photocatalytic overall water splitting is observed on a ferroelectric BaTiO3 single crystal after assembling oxidation and reduction cocatalysts on the positively and negatively charged Au nanoparticles, respectively. The fabrication of bipolar charge-collecting structures on ferroelectrics to achieve overall water splitting offers a way to utilize the energetic photogenerated charges in solar energy conversion.

Funder

National Natural Science Foundation of China

Dalian Institute of Chemical Physics

Publisher

Springer Science and Business Media LLC

Subject

General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary

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