An Organic Molecular Photocatalyst Releasing Oxygen from Water. Issue 21 (15th October 2019)

• Record Type: Journal Article
• Authors: Li, Qinghe; Liu, Feng; Lin, Feng; Lin, Wei; Wang, Xinchen
• Is Part Of: ChemSusChem. Volume 12:Issue 21(2019)
• Page Start: 4854
• Page End: 4858
• Publication Date: 2019-10-15
• Subjects: photochemistry -- photosynthesis -- pyrenes -- synthesis design -- water splitting; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201901899
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: Artificial photosynthesis employing solar energy is one of the best means of reaching a sustainable energy cycle, in which water is oxidized to oxygen and supplies electrons for fuel generation. The development of suitable oxygen evolution materials driven by sunlight is hence the most challenging research topic in the field of photocatalysis. Herein, photocatalytic O2 production from water at a rate of 22.6 μmol h −1 was performed by using a pyrene‐based organic molecule constructed through the Ullmann coupling reaction. Its significantly improved light‐harvesting ability and notably accelerated separation and transfer of photogenerated charges enhanced the O2 evolution efficiency. This study highlights the structural design of organic molecules applied to photocatalytic water splitting. Abstract : Going metal‐free : An organic photocatalyst, 1, 3, 6, 8‐tetra(1, 2, 4‐triazole)pyrene, is constructed through an Ullmann coupling reaction. Studies on this photocatalyst reveal improved light absorption, which results in higher photoactivity for oxygen evolution through water splitting.