Gold-Loaded Nanoporous Iron Oxide Cubes Derived from Prussian Blue as Carbon Monoxide Oxidation Catalyst at Room Temperature


Zaman, Mukter and Tanaka, Shunsuke and Zakaria, Mohamed Barakat and Kaneti, Yusuf Valentino and Jikihara, Yohei and Nakayama, Tsuruo and Bando, Yoshio and A. Hossain, Md. Shahriar and Golberg, Dmitri and Yamauchi, Yusuke (2019) Gold-Loaded Nanoporous Iron Oxide Cubes Derived from Prussian Blue as Carbon Monoxide Oxidation Catalyst at Room Temperature. ChemistrySelect, 3 (47). pp. 13464-13469. ISSN 2365-6549

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This work reports the preparation of carbon monoxide (CO) oxidation catalysts based on gold nanoparticles supported on nanoporous iron oxide cubes. By heat-treating Prussian blue (PB) cubes at various temperatures between 250–450°C in air, nanoporous iron oxide cubes with surface areas up to 100 m2g 1 are obtained. Owing to the relatively large surface area and nanoporous structure, the as-synthesized iron oxide cubes can be loaded with up to 11 wt% of Au nanoparticles without significant aggregation. When employed for CO oxidation, the Au-loaded nanoporous iron oxide cubes exhibit a high CO conversion rate of over 95% at room temperature under 0.1 L⋅min 1 of CO gas flow, with specific activity of up to 1.79 molCO⋅gAu 1 ⋅h 1 . The high catalytic performance of the Auloaded nanoporous iron oxide cubes for CO oxidation is contributed by various factors, including: (i) the high surface area of the iron oxide cubes which leads to the availability of more sites for the adsorption of oxygen molecules to react with carbon monoxide to generate more carbon dioxide (CO2); (ii) the presence of nanopores which enhances the diffusivity of the reactant molecules during the catalytic reaction and improves dispersion of the deposited gold nanoparticles while also preventing their aggregation at the same time and (iii) the small size of the deposited gold nanoparticles (2-5 nm) which falls within the ideal size of gold nanoparticles for achieving high CO convers

Item Type: Article
Uncontrolled Keywords: Carbon Monoxide
Subjects: T Technology > TP Chemical technology > TP155-156 Chemical engineering
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Suzilawati Abu Samah
Date Deposited: 08 Apr 2022 01:32
Last Modified: 08 Apr 2022 01:32


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