Photoelectrocatalysis of oxygen evolution on nTiO2

✍ Scribed by A.Q. Contractor; J.O'M. Bockris

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 237 KB
• Volume: 32
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(87)87019-6

✦ Synopsis

Photoelectrochemical evolution of oxygen on n-TiO, is catalysed in basic medium by metal islets deposited on the electrode surface. The electrocatalytic effect increases linearly with D(M-H). However, no catalytic effect of the metal islets is observed in acidic solutions. Such findings are contrary to those expected on a Schottky barrier model. They are consistent with a model in which the overall rate of the photoelectrochemical reaction is controlled by the step at the metal-solution interface. * These were calculated from Born-Habcr cycle considerations similar to those of Ruetschi and Delahay[ll]. Acknowledgement+Discussions with Drs B. Au&n-Blajeni and M. Szklarcsyk of this laboratory and Dr A. J. Appleby of EPRI are gratefully acknowledged. The authors acknowledge gifts made to Texas A&M University by Dr Hampton Robinson, Jr, and his encouragement towards the development of a technology for storage of solar energy.