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  • Carbon-Supported Bimetallic Ruthenium-Iridium Catalysts for Selective and Stable Hydrodebromination of Dibromomethane

    • Carbon-Supported Bimetallic Ruthenium-Iridium Catalysts for Selective and Stable Hydrodebromination of Dibromomethane

    Title Carbon-Supported Bimetallic Ruthenium-Iridium Catalysts for Selective and Stable Hydrodebromination of Dibromomethane
    Authors Ali J. Saadun, Dr. Sharon Mitchell, Hristo Bonchev, Prof. Javier Pérez‐Ramírez
    Magazine Chemcatchem
    Date 11/29/2021
    DOI 10.1002/cctc.202101494
    Introduction Catalysts composed of individual precious metals on carbon and oxide supports have demonstrated selective performance in converting CH2Br2 to CH3Br, a crucial step in halogen-mediated methane upgrading. However, these catalysts often face challenges such as coking and sintering, which are not mitigated by merely controlling metal species nuclearity, affecting their practical use. This study focuses on carbon-supported Ir-Ru catalysts with varying metal ratios but consistent nanoparticle sizes (approximately 1.0 nm) to examine the influence of a secondary metal on both reactivity and stability. The research identifies ruthenium-doped iridium nanoparticles as the pioneering system that offers substantial CH3Br selectivity (up to 93%) along with significant stability, outperforming previous catalysts. This performance is attributed to the close interaction between the two metals, forming ruthenium-poor surface alloys that effectively hinder deactivation and prevent over-hydrogenation and coking pathways.
    Quote Ali J. Saadun, Sharon Mitchell and Hristo Bonchev et al. Carbon‐Supported Bimetallic Ruthenium‐Iridium Catalysts for Selective and Stable Hydrodebromination of Dibromomethane. ChemCatChem. 2021. Vol. 14(2). DOI: 10.1002/cctc.202101494
    Element Carbon (C) , Hydrogen (H) , Iridium (Ir) , Ruthenium (Ru)
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