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Article dans une revue
Selective CO2 reduction into formate using Ln-Ta oxynitrides combined with a binuclear Ru(II) complex under visible light
Abstract : Hybrid materials constructed from a visible-light-absorbing semiconductor and a functional metal complex have attracted attention as efficient photocatalysts for CO2 reduction with high selectivity to a desired product. In this work, defect fluorite-type Ln-Ta oxynitrides LnTaOxNy (Ln = Nd, Sm, Gd, Tb, Dy and Ho) were examined as the semiconductor component in a hybrid photocatalyst system combined with known Ag nanoparticle promoter and binuclear ruthenium(II) complex (RuRu'). Among the LnTaOxNy examined, TbTaOxNy gave the highest performance for CO2 reduction under visible light (λ > 400 nm), with a RuRu'-based turnover number of 18 and high selectivity to formate (>99%). Physicochemical analyses indicated that high crystallinity and more negative conduction band potential of LnTaOxNy with the absence of Ln-4f states in the band gap structure contributed to higher activity of the hybrid photocatalyst.
Littérature citée [41 références]
https://hal-univ-rennes1.archives-ouvertes.fr/hal-02895318
Contributeur : François Cheviré <>
Soumis le : jeudi 9 juillet 2020 - 15:57:52
Dernière modification le : mardi 12 janvier 2021 - 16:37:47
Archivage à long terme le : : lundi 30 novembre 2020 - 18:10:11
Contributeur : François Cheviré <>
Soumis le : jeudi 9 juillet 2020 - 15:57:52
Dernière modification le : mardi 12 janvier 2021 - 16:37:47
Archivage à long terme le : : lundi 30 novembre 2020 - 18:10:11
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2020_JournalOfEnergyChemistry(...
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