Available online
Description
'In the photochemistry laboratories at the Royal Institution, Sir George Porter outlines the aim - to find a way to split water into hydrogen and oxygen - and looks at some of the possible answers.... He starts with straightforward electrolysis of water, and proceeds via photoassisted cells, to Nozik's diode, which splits water photochemically without the assistance of an electric current. Systems that use chlorophyll and chlorophyll analogues as the sensitiser are then examined. Sir George concludes by looking at the particle systems recently developed by Michael Gratzel. These systems do split water into hydrogen and oxygen, using visible light, but the yields as yet are very low. This programme contains many specially shot animation sequences, which help to explain the various Redox diagrams, and electron transfer processes.'
'In the photochemistry laboratories at the Royal Institution, Sir George Porter outlines the aim - to find a way to split water into hydrogen and oxygen - and looks at some of the possible answers.... He starts with straightforward electrolysis of water, and proceeds via photoassisted cells, to Nozik's diode, which splits water photochemically without the assistance of an electric current. Systems that use chlorophyll and chlorophyll analogues as the sensitiser are then examined. Sir George concludes by looking at the particle systems recently developed by Michael Gratzel. These systems do split water into hydrogen and oxygen, using visible light, but the yields as yet are very low. This programme contains many specially shot animation sequences, which help to explain the various Redox diagrams, and electron transfer processes.'
| Module code and title: | S341, "Photochemistry: light, chemical change and life" |
|---|---|
| Item code: | S341; 11 |
| First transmission date: | 12-09-1982 |
| Published: | 1982 |
| Rights Statement: | |
| Restrictions on use: | |
| Duration: | 00:25:00 |
| + Show more... | |
| Producer: | Hendrik Ball |
| Contributor: | George Porter |
| Publisher: | BBC Open University |
| Keyword(s): | Animations; Chlorophyll; Electrolysis; Flash; Methyl viologen; Nozik's diode; Photoassisted cells; Photolysis; Royal Institution; Water splitting |
| Master spool number: | HOU3835 |
| Production number: | FOUS209A |
| Videofinder number: | 2024 |
| Available to public: | no |
