Bipolar charge collecting structure enables overall water splitting on ferroelectric photocatalysts

Yong Liu, Mingjian Zhang, Zhuan Wang, Jiandong He, Jie Zhang, Sheng Ye, Xiuli Wang, Dongfeng Li, Heng Yin, Qianhong Zhu, Huanwang Jing, Yuxiang Weng, Feng Pan, Ruotian Chen, Can Li and Fengtao Fan ()
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Yong Liu: Chinese Academy of Sciences
Mingjian Zhang: Peking University, Shenzhen Graduate School
Zhuan Wang: Institute of Physics Chinese Academy of Science
Jiandong He: Chinese Academy of Sciences
Jie Zhang: Chinese Academy of Sciences
Sheng Ye: Chinese Academy of Sciences
Xiuli Wang: Chinese Academy of Sciences
Dongfeng Li: Chinese Academy of Sciences
Heng Yin: Chinese Academy of Sciences
Qianhong Zhu: Chinese Academy of Sciences
Huanwang Jing: Lanzhou University
Yuxiang Weng: Institute of Physics Chinese Academy of Science
Feng Pan: Peking University, Shenzhen Graduate School
Ruotian Chen: Chinese Academy of Sciences
Can Li: Chinese Academy of Sciences
Fengtao Fan: Chinese Academy of Sciences

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract Ferroelectrics 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.

Date: 2022
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DOI: 10.1038/s41467-022-32002-y

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