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Abstract
Herein, MnO2@SiO2/C was produced from rice husk derived SiO2/carbon composite and MnO2 via hydrothermal method. The nanostructure gave good microstructural, morphological properties with highly catalytic properties. The hybrid catalyst comprising of MnO2@SiO2/C nanocomposite-supported gold nanoparticles was successfully fabricated by the novel solid grinding and tested for CO oxidation’s application. MnO2 nanoballs are 5 − 8 nm in diameter with a shell thickness of 1 nm, packing with laminar [MnO6] unit cells. The as-prepared gold catalysts containing 2wt% of Au loading, exhibited 50% CO conversion and a high specific activity of 0.21 molCO gAu−1 h−1 at 38 °C. Graphic Abstract MnO2@SiO2/C nanocomposite-supported gold nanoparticles were prepared by solid grinding using a non-volatile organogold(III) complex and rice husk. The catalysts showed high activity for CO oxidation.
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1 Hanoi University of Science and Technology, School of Chemical Engineering, Hanoi, Vietnam (GRID:grid.440792.c); Tokyo Metropolitan University, Research Ceter for Gold Chemistry, Hachioji, Japan (GRID:grid.265074.2) (ISNI:0000 0001 1090 2030)
2 Hanoi University of Science and Technology, School of Chemical Engineering, Hanoi, Vietnam (GRID:grid.440792.c)
3 Vietnam Academy of Science and Technology, Institute of Materials Science, Hanoi, Vietnam (GRID:grid.267849.6) (ISNI:0000 0001 2105 6888)
4 Hanoi University of Science and Technology, School of Engineering Physics, Hanoi, Vietnam (GRID:grid.440792.c)
5 Toyota Technological Institute, Tempaku, Japan (GRID:grid.265129.b) (ISNI:0000 0001 2301 7444)
6 Tokyo Metropolitan University, Research Ceter for Gold Chemistry, Hachioji, Japan (GRID:grid.265074.2) (ISNI:0000 0001 1090 2030)