Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 26, Pages 10363-10367Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202001231
Keywords
electron transfer; hydrogen evolution; nanoparticles; perylene bisimides; solar energy
Categories
Funding
- National Natural Science Foundation of China (NSFC)
- German Research Foundation (DFG) [51761135101, Wu317/21-1]
- NSFC [21733005, 21975076, 51521002]
- Key Program of Guangzhou Scientific Research Special Project [201707020024]
- Bavarian State Ministry of Science, Research, and the Arts
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A photocatalytic system containing a perylene bisimide (PBI) dye as a photosensitizer anchored to titanium dioxide (TiO2) nanoparticles through carboxyl groups was constructed. Under solar-light irradiation in the presence of sacrificial triethanolamine (TEOA) in neutral and basic conditions (pH 8.5), a reaction cascade is initiated in which the PBI molecule first absorbs green light, giving the formation of a stable radical anion (PBI.-), which in a second step absorbs near-infrared light, forming a stable PBI dianion (PBI2-). Finally, the dianion absorbs red light and injects an electron into the TiO2 nanoparticle that is coated with platinum co-catalyst for hydrogen evolution. The hydrogen evolution rates (HERs) are as high as 1216 and 1022 mu mol h(-1) g(-1) with simulated sunlight irradiation in neutral and basic conditions, respectively.
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