Interfacial design of new generation of dye-sensitized photoelectrochemical cells for water oxidation

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2018,（10）
• 页码范围: 1203-1204
• 页数: 2页
• 语种: 英文

摘要

Artificial photosynthesis involves the conversion of solar energy,water,and CO2 into chemical fuels and oxygen.One of the most challenging steps is the production of oxygen from water oxidation,as it involves multi-electron and proton transfer processes.Recently,dye-sensitized photoelectrochemical cells (DSPECs) have been widely investigated as the devices to attain the goal of water oxidation.Generally,these devices are comprised of a wide band gap semiconductor,typically TiO2 or SnO2,a molecular chromophore as a sensitizer,and a water oxidation catalyst (WOC).The molecular sensitizers capture visible light,which generates an excited state (S*),and inject the excited electrons into the conduction band of the semiconductor.The oxidized sensitizers (S+) then extract electrons from the WOC to regenerate the sensitizers.After multiple electron transfers,oxygen is generated via the catalytic turnovers.