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    CO temperature-programmed desorption of hexameric copper hydride nanoclusters catalyst supported on functionalized MWCNTs for kinetics study of low-temperature water-gas shift (2018)

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    Type of Content
    Conference Contributions - Other
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    http://hdl.handle.net/10092/16031
    
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    • Engineering: Conference Contributions [2298]
    Authors
    Baharudin L
    Yip, Alex cc
    Golovko V
    Watson MJ
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    Abstract

    A novel catalyst made of crystallized hexameric copper hydride nanoclusters (Cu6) ligated with triphenylphosphine [(PPh3)CuH]6 deposited on functionalized multi-walled carbon nanotubes (MWCNTs) support is synthesized for a catalytic activity investigation in low-temperature water-gas shift (LTWGS) reaction. CO temperature-programmed desorption (CO-TPD) technique is employed to analyse the strength of the CO interacton with the catalyst surface, indicated by the CO desorption peak temperatures (lower temperature peak; weaker site and vice versa) and the breadth of the peak shoulders (broader shoulder; stronger site and vice versa). An actual LTWGS reaction run over the synthesized catalysts will be conducted to evaluate their actual performance based on CO conversion for the reaction kinetic study. The rate of reaction based on the catalyst sample that gives the highest CO conversion based on turnover frequency will be developed based on the expression derived from Moe or power-law model. A comparison of the activation energy value from the optimal catalyst developed in this work with the experimentally determined values from literature will be made. The overall finding will conclude if the LTWGS over the optimal Cu/MWCNTs catalyst follows regenerative/surface redox or Langmuir-Hinshelwood (LH) mechanism.

    Keywords
    chemisorption; copper nanoclusters; reaction mechanism; water-gas shift
    ANZSRC Fields of Research
    40 - Engineering::4004 - Chemical engineering::400408 - Reaction engineering (excl. nuclear reactions)
    10 - Technology::1007 - Nanotechnology::100799 - Nanotechnology not elsewhere classified

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    • CO temperature-programmed desorption of a hexameric copper hydride nanocluster catalyst supported on functionalized MWCNTs for active site characterization in a low-temperature water-gas shift reaction 

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      A family of novel catalysts was generated using chemically synthesised, atomically precise hexameric copper hydride nanoclusters (Cu6) deposited on carboxyl-pre-functionalized multi-walled carbon nanotubes (MWCNTCOOH). The ...
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      Baharudin, L.; Severinsen, I.; Yip, Alex; Golovko, V.B.; Watson, M.J. (2020)
      Kinetics of CO oxidation over hexameric copper nanoclusters supported on carboxyl-functionalised multi-walled carbon nanotubes (Cu6/MWCNTCOOH) was studied between 400 and 475 °C. An excessive amount of O2 in the feed gas ...
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