具有多介质调制的无辅助光电化学电池用于太阳能水分解超过 4% 的太阳能制氢效率,Journal of the American Chemical Society

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具有多介质调制的无辅助光电化学电池用于太阳能水分解超过 4% 的太阳能制氢效率
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2021-08-03 , DOI: 10.1021/jacs.1c00802
Sheng Ye ₁ , Wenwen Shi _{1,

2} , Yong Liu ₁ , Dongfeng Li _{1,

2} , Hang Yin _{1,

2} , Haibo Chi ₁ , Yaling Luo _{1,

2} , Na Ta ₁ , Fengtao Fan ₁ , Xiuli Wang ₁ , Can Li ₁

Affiliation

光电化学全分解水被认为是一种从太阳能产生化学能的有前途的方法。尽管通过耦合两个半导体光电极开发了许多用于整体水分解的光电化学电池，但光收集器和电子受体/供体之间低效的电荷转移严重限制了太阳能转换效率。受自然光合作用的启发，我们组装了一个具有多媒体调制器的光电化学平台，以实现无辅助的整体水分解。光生电子通过由电化学势梯度驱动的多介质有序转移，从而实现有效的电荷分离和传输，提高了电荷转移率，降低了电荷复合率。₄ ) 和具有互补光吸收的有机聚合物基光电阴极 (PBDB-T:ITIC:PC ₇₁ BM) 表现出高达 4.3% 的太阳能到氢气的转换效率。这项工作通过在用于太阳能燃料生产的人工光合作用系统中构建有效的电荷转移链，使合理的设计成为可能。

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Unassisted Photoelectrochemical Cell with Multimediator Modulation for Solar Water Splitting Exceeding 4% Solar-to-Hydrogen Efficiency

Photoelectrochemical overall water splitting has been considered as a promising approach for producing chemical energy from solar energy. Although many photoelectrochemical cells have been developed for overall water splitting by coupling two semiconductor photoelectrodes, inefficient charge transfer between the light-harvesters and electron acceptor/donor severely restricts the solar energy conversion efficiency. Inspired by natural photosynthesis, we assembled a photoelectrochemical platform with multimediator modulation to achieve unassisted overall water splitting. Photogenerated electrons are transferred in order through multimediators driven by the electrochemical potential gradient, resulting in efficient charge separation and transportation with enhanced charge transfer rate and reduced charge recombination rate. The integrated system composed of inorganic oxide-based photoanode (BiVO₄) and organic polymer-based photocathode (PBDB-T:ITIC:PC₇₁BM) with complementary light absorption, exhibits a solar-to-hydrogen conversion efficiency as high as 4.3%. This work makes a rational design possible by constructing an efficient charge-transfer chain in artificial photosynthesis systems for solar fuel production.

更新日期：2021-08-19

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