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FTIR Study Of Formic Acid Interaction With TiO

J. Araña, C. G. I. Cabo, J. M. Doña-Rodríguez, O. González-Díaz, J. Herrera-Melián, J. Pérez-Peña
Published 2004 · Chemistry, Materials Science

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Abstract In this study the different processes occurring on the TiO 2 and Pd and Cu doped TiO 2 surfaces during the photocatalytic formic acid degradation in the presence or absence of S 2 O 8 2− or H 2 O 2 have been investigated. FTIR studies have shown the relevance of the H-bounded hydroxyl groups. It has been observed that formate molecules interact simultaneously with the dopants and surfacial Ti atoms yielding an intermediate species which plays an important role in the phototacatalytic degradation mechanism. Also, it has been determined that Pd or Cu oxides may act as receptors or transmitters of the TiO 2 photogenerated electrons and thus modify the degradation mechanism. Different redox reactions have been proposed according to the obtained results.
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