MoSe2‐Sensitized Water Splitting Assisted by C60‐Dendrons on the Basal Surface

• Published in: Chemistry : a European journal 2024-11, Vol.30 (70), p.e202402690-n/a
• Main Authors: Tajima, Tomoyuki, Matsuura, Tomoki, Efendi, Arif, Yukimoto, Mariko, Takaguchi, Yutaka
• Format: Article
• Language: English
• Subjects: Basal plane; Excitons; Fullerene; Heterojunctions; Hydrogen evolution; Hydrogen evolution reactions; Molybdenum compounds; Photocatalyst; Photoexcitation; Transition metal dichalcogenide; Water splitting
• ISSN: 0947-6539; 1521-3765; 1521-3765
• DOI: 10.1002/chem.202402690

To facilitate water splitting using MoSe2 as a light absorber, we fabricated water‐dispersible MoSe2/C60‐dendron nanohybrids via physical modification of the basal plane of MoSe2. Upon photoirradiation, the mixed‐dimension MoSe2/C60 (2D/0D) heterojunction generates a charge‐separated state (MoSe2⋅+/C60⋅−) through electron extraction from the exciton in MoSe2 to C60. This process is followed by the hydrogen evolution reaction (HER) from water in the presence of a sacrificial donor (1‐benzyl‐1,4‐dihydronicotinamide) and co‐catalyst (Pt‐PVP). The apparent quantum yields of the HER were estimated to be 0.06 % and 0.27 % upon photoexcitation at the A‐ and B‐exciton absorption peaks (λmax=800 and 700 nm), respectively. Upon photoirradiation of a water dispersion of MoSe2/C60‐dendron nanohybrids, the hydrogen evolution reaction (HER) proceeded in the presence of a sacrificial donor (1‐benzyl‐1,4‐dihydronicotinamide) and co‐catalyst (Pt‐PVP). The apparent quantum yields of the HER were estimated to be 0.06 % and 0.27 % upon photoexcitation at the A‐ and B‐exciton absorption peaks (λmax=800 and 700 nm), respectively.