Synergistic Effects of Two Co-catalysts on Zn₂GeO₄ on Photocatalytic Water Splitting

Synergistic Effects of Two Co-catalysts on Zn₂GeO₄ on Photocatalytic Water Splitting

Zinc orthogermanate was prepared via a hydrothermal method and a remarkable synergistic effect on the photocatalytic activity for overall water splitting was found for Zn₂GeO₄ co-loaded with noble metals (Pt, Rh, Pd, Au) and metal oxides (RuO₂, IrO₂). The photocatalytic activity of Pt-RuO₂/Zn₂GeO₄ f...

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Veröffentlicht in:Catalysis letters 2010-01, Vol.134 (1-2), p.78-86
Hauptverfasser: Ma, Baojun, Wen, Fuyu, Jiang, Hongfu, Yang, Jinhui, Ying, Pinliang, Li, Can
Format: Artikel
Sprache:eng
Schlagworte:
Catalysis
Catalysts
Catalytic activity
Chemistry
Chemistry and Materials Science
Exact sciences and technology
General and physical chemistry
Gold
Hydrogen production
Industrial Chemistry/Chemical Engineering
Noble metals
Organometallic Chemistry
Palladium
Photocatalysis
Photochemistry
Physical Chemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Platinum
Ruthenium oxide
Synergistic effect
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Water splitting
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Zusammenfassung:Zinc orthogermanate was prepared via a hydrothermal method and a remarkable synergistic effect on the photocatalytic activity for overall water splitting was found for Zn₂GeO₄ co-loaded with noble metals (Pt, Rh, Pd, Au) and metal oxides (RuO₂, IrO₂). The photocatalytic activity of Pt-RuO₂/Zn₂GeO₄ for overall water splitting is 2.2 times of Pt/Zn₂GeO₄ and 3.3 times of RuO₂/Zn₂GeO₄. Photocatalytic half reactions evaluation of water splitting for H₂ and O₂ productions shows that Pt plays the major roles in H₂ production and RuO₂ promotes the O₂ production. The roles and valence states of co-catalysts and the mechanism of photocatalytic reaction are discussed.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-009-0220-8