Nitrogen-Doped Carbon Nanotubes as a Highly Active Metal-Free Catalyst for Selective Oxidation

Authors

  • Dr. Kambiz Chizari,

    1. Laboratoire des Matériaux, Surfaces et Procédés pour la Catalyse (LMSPC, UMR 7515 CNRS), Université de Strasbourg, 25, rue Becquerel, 67087 Strasbourg Cedex 02 (France)
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  • Dr. Adrien Deneuve,

    1. Laboratoire des Matériaux, Surfaces et Procédés pour la Catalyse (LMSPC, UMR 7515 CNRS), Université de Strasbourg, 25, rue Becquerel, 67087 Strasbourg Cedex 02 (France)
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  • Dr. Ovidiu Ersen,

    1. Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS, UMR 7504 CNRS), Université de Strasbourg, 23, rue du Loess, 67037 Strasbourg Cedex 08 (France)
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  • Dr. Ileana Florea,

    1. Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS, UMR 7504 CNRS), Université de Strasbourg, 23, rue du Loess, 67037 Strasbourg Cedex 08 (France)
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  • Dr. Yu Liu,

    1. Laboratoire des Matériaux, Surfaces et Procédés pour la Catalyse (LMSPC, UMR 7515 CNRS), Université de Strasbourg, 25, rue Becquerel, 67087 Strasbourg Cedex 02 (France)
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  • Prof. David Edouard,

    1. Laboratoire des Matériaux, Surfaces et Procédés pour la Catalyse (LMSPC, UMR 7515 CNRS), Université de Strasbourg, 25, rue Becquerel, 67087 Strasbourg Cedex 02 (France)
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  • Dr. Izabela Janowska,

    1. Laboratoire des Matériaux, Surfaces et Procédés pour la Catalyse (LMSPC, UMR 7515 CNRS), Université de Strasbourg, 25, rue Becquerel, 67087 Strasbourg Cedex 02 (France)
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  • Dr. Dominique Begin,

    1. Laboratoire des Matériaux, Surfaces et Procédés pour la Catalyse (LMSPC, UMR 7515 CNRS), Université de Strasbourg, 25, rue Becquerel, 67087 Strasbourg Cedex 02 (France)
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  • Dr. Cuong Pham-Huu

    Corresponding author
    1. Laboratoire des Matériaux, Surfaces et Procédés pour la Catalyse (LMSPC, UMR 7515 CNRS), Université de Strasbourg, 25, rue Becquerel, 67087 Strasbourg Cedex 02 (France)
    • Laboratoire des Matériaux, Surfaces et Procédés pour la Catalyse (LMSPC, UMR 7515 CNRS), Université de Strasbourg, 25, rue Becquerel, 67087 Strasbourg Cedex 02 (France)
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Abstract

Catalytic reactions are generally carried out on supported metals or oxides, which act as an active phase and require impregnation and thermal treatment steps. During tests, the metal or oxide nanoparticles could be further sintered, which would induces deactivation. Direct incorporation of the active phase into the matrix of a support could be an elegant alternative to prevent catalyst deactivation. Here, we report that nitrogen-doped carbon nanotubes (N-CNTs) can be efficiently employed as a metal-free catalyst for oxidative reactions that allow the selective transformation of the harmful, gaseous H2S into solid sulfur. The catalyst exhibits a high stability during the test at high space velocity. The macroscopic shaping of the catalyst on the silicon carbide foam also increases its catalytic activity by improving the contact between the reactants and the catalyst. Such macroscopic shaping allows the avoidance of problems linked with transport and handling of nanoscopic materials and also reduces the pressure drop across the catalyst bed to a large extent.

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