ΠΟΛΥΗΛΕΚΤΡΟΝΙΚΗ ΦΩΤΟΑΝΑΓΩΓΗ ΤΩΝ ΕΤΕΡΟΠΟΛΥΑΝΙΟΝΤΩΝ P2W18O62 , PV2W10O40 , PV2MO10O40 . ΣΥΜΒΟΛΗ ΣΤΗ ΦΩΤΟΧΗΜΙΚΗ ΜΕΤΑΤΡΟΠΗ ΚΑΙ ΑΠΟΘΗΚΕΥΣΗ ΤΗΣ ΗΛΙΑΚΗΣ ΕΝΕΡΓΕΙΑΣ

SOME 2:18 AND 1:12 HETEROPOLYANIONS ARE PHOTOREDUCED UNDER ILLUMINATION WITH UVAND NEAR VISIBLE LIGHT IN PRESENCE OF A VARIETY OF ORGANIC SUBSTANCES. IN THE CASE OF P2W18O626- THE PHOTOREDUCTION PROCEEDS STEPWISE AND LEADS TO THE FORMATION OF PRODUCTS THAT ARE ABLE, FROM A THERMODYNAMIC POINT OF VIEW, TO REDUCE WATER PRODUCING HYDROGEN H2-EVOLUTION INDEED TAKES PLACE WITH AND WITHOUT PT CATALYST. RATE CONSTANTS FOR THIS EVOLUTION ARE A FUNCTION OF REDUCTION STEP, PH AND PT CATALYST PRESENCE AND ARE OF THE ORDER OF 10-4 5-1. REPLACEMENT OF W OR MOWITH ATOMS IN 1:12 WITH AND WITHOUT PT CATALYS. RATE CONSTANTS FOR THIS EVOLUTION ARE A FUNCTION OF REDUCTIO PH AND PT CATALYST PRESENCE AND ARE OF THE ORDEROF 10-4 5-1. REPLACEMENT OF W O ATOMS IN 1:12 HETEROPOLYANIONS SHIFTS THEIR ABSORPTION SPECTRA TOWARD THE VISIBLE ALLOWING THEIR PHOTOREDUCTION WITH CONCOMITANT OXIDATION OF ORGANIC COMPOUNDS WITH LIGHT OF THIS AREA. NEVERTHELESS, THE PHOTOREDUCTION PROCEEDS WITH LOWER QUANTUM YIELD UNDER ILLUMINATION AT O -> V BANDS (Λ > 400NM) IN COMPARISON TO THE CORRESPONDING 0 -> W AND 0 -> MO BANDS. MOREOVER, NO MORE THAN 2 ELECTRONS ARE ADDED TO THE TWO MIXED HETEROPOLYANIONS AND NO H2 IS PRODUCED, WITH LIGHT Λ > 400NM.

Grantor dc:publisher

National and Kapodistrian University of Athens

Year dc:date

1987

Authors dc:creator

• Argitis, Panagiotis
• Αργείτης, Παναγιώτης

• Ετεροπολυανιόντα
• ΜΙΚΤΑ ΕΤΕΡΟΠΟΛΥΑΝΙΟΝΤΑ
• Παραγωγή υδρογόνου
• ΠΟΛΥΟΞΟΜΕΤΑΛΛΙΚΑ ΑΝΙΟΝΤΑ
• ΦΩΤΟΔΙΑΣΠΑΣΗ ΤΟΥ ΝΕΡΟΥ
• ΦΩΤΟΟΞΕΙΔΟΑΝΑΓΩΓΙΚΕΣ ΑΝΤΙΔΡΑΣΕΙΣ
• ΦΩΤΟΧΗΜΙΚΗ ΜΕΤΑΤΡΟΠΗ ΗΛΙΑΚΗΣ ΕΝΕΡΓΕΙΑΣ
• HETEROPOLYANIONS
• MIXED HETEROPOLYANIONS
• PHOTOCHEMICAL CONVERSION OF SOLAR ENERGY
• PHOTOREDOX REACTIONS
• Polyoxometallates
• PRODUCTION OF HYDROGEN
• WATER PHOTODISSOCIATION
• Φυσικές Επιστήμες
• Χημεία
• Natural Sciences
• Chemical Sciences

Language dc:language

gre

Identifier

10.12681/eadd/0584

OAI identifier oai:identifier

oai:10442/0584