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Microstructures of Cu–4.7Sn (%) alloys prepared by two-phase zone continuous casting (TZCC) technology contain large columnar grains and small grains. A compound grain structure, composed of a large columnar grain and at least one small grain within it, is observed and called as grain-covered grains (GCGs). Distribution of small grains, their numbers and sizes as well as numbers and sizes of columnar...
Platinum was supported on γ-Al2O3 and ultra-stable Y zeolite (USY) by an incipient wetness impregnation method. The catalysts were characterized by nitrogen physisorption, transmission electron microscopy (TEM), CO/C3H8 isothermal oxidations, NH3 temperature-programmed desorption (NH3–TPD) and infrared (IR) spectroscopy of adsorbed probe molecules (CO, C3H8 and C3H8 + O2). Compared with Pt/Al2O3,...
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