Review Article | Published:

Semiconducting quantum dots for artificial photosynthesis

Nature Reviews Chemistryvolume 2pages160173 (2018) | Download Citation

Abstract

Sunlight is our most abundant, clean and inexhaustible energy source. However, its diffuse and intermittent nature makes it difficult to use directly, suggesting that we should instead store this energy. One of the most attractive avenues for this involves using solar energy to split H2O and afford H2 through artificial photosynthesis, the practical realization of which requires low-cost, robust photocatalysts. Colloidal quantum dots (QDs) of IIB–VIA semiconductors appear to be an ideal material from which to construct highly efficient photocatalysts for H2 photogeneration. In this Review, we highlight recent developments in QD-based artificial photosynthetic systems for H2 evolution using sacrificial reagents. These case studies allow us to introduce strategies — including size optimization, structural modification and surface design — to increase the H2 evolution activities of QD-based artificial photosystems. Finally, we describe photocatalytic biomass reforming and unassisted photoelectrochemical H2O splitting — two new pathways that could make QD-based solar-to-fuel conversion practically viable and cost-effective in the near future.

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Acknowledgements

The authors are grateful for financial support from the Ministry of Science and Technology of China (2014CB239402 and 2017YFA0206903), the National Science Foundation of China (21390404, 21861132004 and 21603248), the Strategic Priority Research Program of the Chinese Academy of Science (XDB17000000), Key Research Program of Frontier Science of the Chinese Academy of Sciences (QYZDY-SSW-JSCO29) and the Youth Innovation Promotion Association of Chinese Academy of Sciences (2018031).

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  1. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China

    • Xu-Bing Li
    • , Chen-Ho Tung
    •  & Li-Zhu Wu
  2. School of Chemistry and Chemical Engineering, Shandong University, Jinan, China

    • Chen-Ho Tung

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https://doi.org/10.1038/s41570-018-0024-8