JUCER (2024): 24.
The oxidation of carbon monoxide (CO) into carbon dioxide (CO2) has been considered one of the most important reactions in reducing environmental pollution from many industries, including automobiles. Over the last decade, researchers have investigated different metal catalysts to be implemented in CO oxidation to improve catalytic performance. Boron nitride nanotubes (BNNTs) have raised interest due to their high thermal and chemical stability, especially under oxidizing conditions. Theoretical studies have shown the potential of using BNNT as a support material for metal catalysts such as platinum group metals (PGM) for CO oxidation reactions. In this study, Ruthenium oxide (RuOx) was deposited onto hexagonal boron nitride (h-BN) and BNNT with different loadings of Ru precursor through the One-Pot Chemical Vapor Deposition (OP-CVD) method. Transmission electron microscopy (TEM) was used to investigate the dispersion of RuOx on the surface of BNNT and h-BN which affects the catalytic performance. Fourier-Transform Infrared Spectroscopy (FTIR) was used to prove the absence of acetylacetonate ligands (e.g., ∼450 cm−1 IR band) that confirms the utilization of the OP-CVD synthesis method. The CO activity results indicated that BNNT supported catalysts showed a higher catalytic activity (e.g., CO conversion at lower temperatures) compared to h-BN supported catalysts regardless of Ru loading conditions. It can be generally observed that increasing Ru loading from 0.25 wt% to 1.0 wt% increases CO conversion for both RuOx/BNNT and RuOx/h-BN catalysts. This work serves as a comparative study using BN-based 1D (BNNT) and 2D (h-BN) catalytic support materials for CO oxidation reactions.
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