Hydrogen Evolution from Water by Visible Light, a Homogeneous Three Component Test System for Redox Catalysis

✍ Scribed by Kuppuswamy Kalyanasundaram; John Kiwi; Michael Grätzel

• Publisher: John Wiley and Sons
• Year: 1978
• Tongue: German
• Weight: 604 KB
• Volume: 61
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19780610740

✦ Synopsis

Abstract

Irradiation by visible light of a neutral aqueous solution containing Ru (bipy) as a sensitizer, methylviologen (MV^+2^) as an electron acceptor and triethanolamine or cysteine as an electron donor leads to the formation of stable methylviologen radical cation (MV^+^). The kinetics and mechanism of the photoinduced reactions occurring in such a system were explored by laser photolysis technique. In the presence of Adams catalyst MV^+^ is reoxidized by water under simultaneous evolution of hydrogen. Optimum conditions for the water reduction under continuous illumination are elaborated and implications for an energy conversion system discussed.