Abstract
ZnO NWs were fabricated by a thermal evaporation-condensation method in a high-temperature tube furnace. The 2wt%Au/Zn Onanocatalysts were prepared by a deposition-precipitation method. The ZnO NW and powder supported Au catalysts are labeled as Au/ZnO-NW and Au/ZnO-P, respectively. The final catalysts were obtained by calcining the precursors at 400°C for 4 hours. The 5wt%Au/ZnO nanocatalysts calcined at 600°C were synthesized for XRD analysis. The catalytic performances of the prepared samples for CO oxidation were evaluated in a fixed-bed plug-flow reactor. Powder X-ray diffraction (XRD) patterns were taken on a PANalyticalX’pert PRO MRD X-ray diffractometer using Cu Ka radiation. The JEOL JEM-ARM200F aberration-corrected scanning transmission electron microscope (STEM), with a nominal image resolution of 0.08 nm in the high-angle annular dark-field (HAADF) imaging mode, was used to investigate the structure of the Au/ZnO catalysts.
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