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<p>Solar-driven conversion of CO<sub>2</sub> and H<sub>2</sub>O into chemicals is a promising strategy, while achieving simultaneous and efficient CO<sub>2</sub> reduction and H<sub>2</sub>O oxidation remains challenging. Here, inspired by the role of plastoquinone in temporarily storing electrons during natural photosynthesis, we design a silver-modified tungsten trioxide (Ag/WO<sub>3</sub>) that functions as a charge reservoir through reversible W<sup>6+</sup>/W<sup>5+</sup> transitions under irradiation. When coupled with various active components, Ag/WO<sub>3</sub> significantly enhances their CO<sub>2</sub> conversion performance, indicating the universality of this strategy. Specifically, coupling Ag/WO<sub>3</sub> with cobalt phthalocyanine (CoPc), the CoPc/Ag/WO<sub>3</sub> catalyst achieves a CO production rate of ~1.5 mmol g<sub>CoPc</sub><sup>−1</sup> h<sup>−1</sup>, representing a 100-fold enhancement over pure CoPc. Mechanistic studies reveal that electrons stored in Ag/WO<sub>3</sub> efficiently scavenge photogenerated holes from CoPc, thereby maintaining a high electron density at CO<sub>2</sub> reduction sites of CoPc. This work establishes a bioinspired charge reservoir strategy for efficient CO<sub>2</sub> photoreduction, providing a universal approach to solar fuel production.</p>

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Bioinspired charge reservoir enables efficient CO2 photoreduction with H2O via tungsten valence oscillation

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月31日

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  • Yu Huang,
  • Xianjin Shi,
  • Hongna Zhang,
  • Junji Cao,
  • Shuncheng Lee

摘要

Solar-driven conversion of CO2 and H2O into chemicals is a promising strategy, while achieving simultaneous and efficient CO2 reduction and H2O oxidation remains challenging. Here, inspired by the role of plastoquinone in temporarily storing electrons during natural photosynthesis, we design a silver-modified tungsten trioxide (Ag/WO3) that functions as a charge reservoir through reversible W6+/W5+ transitions under irradiation. When coupled with various active components, Ag/WO3 significantly enhances their CO2 conversion performance, indicating the universality of this strategy. Specifically, coupling Ag/WO3 with cobalt phthalocyanine (CoPc), the CoPc/Ag/WO3 catalyst achieves a CO production rate of ~1.5 mmol gCoPc−1 h−1, representing a 100-fold enhancement over pure CoPc. Mechanistic studies reveal that electrons stored in Ag/WO3 efficiently scavenge photogenerated holes from CoPc, thereby maintaining a high electron density at CO2 reduction sites of CoPc. This work establishes a bioinspired charge reservoir strategy for efficient CO2 photoreduction, providing a universal approach to solar fuel production.