Details

Autor(en) / Beteiligte

• Wang, Meiying
• Lv, Haowei
• Dong, Beibei
• He, Wenhao
• Yuan, Daqiang
• Wang, Xinchen
• Wang, Ruihu

Titel

Photoelectron Migration Boosted by Hollow Double‐Shell Dyads Based on Covalent Organic Frameworks for Highly Efficient Photocatalytic Hydrogen Generation

Ist Teil von

• Angewandte Chemie, 2024-04, Vol.136 (17), p.n/a

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Photocatalytic hydrogen production based on noble metal‐free systems is a promising technology for the conversion of solar energy into green hydrogen, it is pivotal and challenging to tailor‐make photocatalysts for achieving high photocatalytic efficiency. Herein, we reported a hollow double‐shell dyad through uniformly coating covalent organic frameworks (COFs) on the surface of hollow Co9S8. The double shell architecture enhances the scattering and refraction efficiency of incident light, shortens the transmission distance of the photogenerated charge carriers, and exposes more active sites for photocatalytic conversion. The hydrogen evolution rate is as high as 23.15 mmol g−1 h−1, which is significantly enhanced when compared with that of their physical mixture (0.30 mmol g−1 h−1) and Pt‐based counterpart (11.84 mmol g−1 h−1). This work provides a rational approach to the construction of noble‐metal‐free photocatalytic systems based on COFs to enhance hydrogen evolution performance. Hollow double‐shell dyads have been constructed using covalent organic frameworks and transition metal sulfides, the double‐shell architecture broadens light absorption, improves hydrogen evolution kinetics and reduces the photogenerated electron transfer resistance, resulting in high performance in photocatalytic hydrogen evolution reaction.