4.8 Article

Ferroelectric polarization enabled spatially selective adsorption of redox mediators to promote Z-scheme photocatalytic overall water splitting

期刊

JOULE
卷 6, 期 8, 页码 1876-1886

出版社

CELL PRESS
DOI: 10.1016/j.joule.2022.06.017

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资金

  1. National Key R&D Program of China [2021YFA1500800]
  2. National Natural Science Foundation of China [52002377, 51825204, 52120105003, 52188101]
  3. China Postdoctoral Sci- ence Foundation [2020M681003, 2020TQ0327, 2020BS009]
  4. China Postdoctoral Science Foundation [2020TQ0327, 2020BS009]
  5. Natural Science Foundation of Liaoning Province [2020M681003]
  6. CAS Projects for Young Scientists in Basic Research [2020TQ0327]
  7. [YSBR-004]

向作者/读者索取更多资源

This research proposes to suppress the side reaction of redox mediator in photocatalytic water splitting by using ferroelectric polarization. By constructing a Z-scheme system with single-domain ferroelectric nanoplates, stable high activity for photocatalytic overall water splitting is achieved.
Although the artificial Z-scheme system, mimicking natural photosyn-thesis, has shown promising applications in photocatalytic water split-ting, it often suffers from the side reaction of redox mediator, which considerably undermines the efficacy of photocarrier utilizations. Herein, we propose to suppress the side reaction by using ferroelec-tric polarization, which not only provides a strong driving force to spatially separate photocarriers to the oppositely poled surface but also induces spatially selective adsorption of redox ions. Single -domain ferroelectric PbTiO3 nanoplates have been adopted as a model ferroelectric to construct the Z-scheme system with BiVO4 par-ticles and a cationic redox mediator. In contrast to the inactive multi -domain ferroelectric PbTiO3-based system, the so-formed Z-scheme system delivers stable high activity for photocatalytic overall water splitting under both visible light and simulated solar insolation. This work offers a proof of concept to realize efficient solar photocatalytic water splitting based on single-domain ferroelectric Z-scheme system.

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