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- W2017146764 abstract "Belichtung (λ ⩽ 290 nm) von platiniertem Cadmiumsulfid oder seinen festen Lösungen mit Zinksulfid in einer wäßrigen Lösung von 2,5-Dihydrofuran führt zur Bildung von Wasserstoff und Dehydrodimeren des cyclischen Ethers. Die im Vergleich zur Zinksulfid-Katalyse kleineren Reaktionsgeschwindigkeiten werden auf die ungünstigere Lage der Energiebänder und die kleinere Lebensdauer der Elektron-Loch-Paare von Cadmiumsulfid zurückgeführt. Die Darstellungsbedingungen des Metallsulfids bestimmen weitgehend die katalytische Aktivität. Elektronenfänger wie Zink und Cadmiumsulfat inhibieren die Bildung des Wasserstoffs und der Dehydrodimeren an verschiedenen Oberflächenzentren. Elementares Zink entsteht am CdS/Pt-Kontakt, Cadmium dagegen an der freien Oberfläche. Als oxidatives Reaktionsprodukt wird während der Inhibierungsphase Furan gebildet. Heterogeneous Photocatalysis, V. — Cadmium-Zinc Sulfides as Catalysts for the Photodehydrodimerization of 2,5-Dihydrofuran Irradiation (λ ⩽ 290 nm) of platinized cadmium sulfide or its homogeneous solutions with zinc sulfide suspended in aqueous solution of 2,5-dihydrofuran leads to the formation of hydrogen and dehydrodimers. The lower reaction rates as compared to the zinc sulfide catalysis are attributed to the less favourable energyband positions and the shorter lifetime of the electron-hole pair of cadmium sulfide. The method of metal sulfide preparation largely determines the catalytic activity. Electron scavengers like zinc and cadmium sulfate inhibit the formation of hydrogen and dehydrodimers at different surface sites. Elemental zinc and cadmium are formed at the CdS/Pt contact and on the free surface, respectively. Furan is produced during the inhibition period as the oxidative reaction product." @default.
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- W2017146764 title "Heterogene Photokatalyse, V. Cadmium‐Zinksulfide als Katalysatoren der Photodehydrodimerisierung von 2,5‐Dihydrofuran" @default.
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- W2017146764 doi "https://doi.org/10.1002/cber.19881210104" @default.
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