Abstract
The effect of Cu content on hydrogen reduction behavior of ball-milled <TEX>$WO_3$</TEX>-CuO nanocomposite powders was investigated. Hydrogen reduction behavior and reduction percent(<TEX>${\alpha}$</TEX>) of nanopowders were characterized by thermogravimetry (TG) and hygrometry measurements. Activation energy for hydrogen reduction of <TEX>$WO_3$</TEX> nanopowders with different Cu content was calculated at each heating rate and reduction percent(<TEX>${\alpha}$</TEX>). The activation energy for reduction of <TEX>$WO_3$</TEX> obtained in this study existed in the ranging from 129 to 139 kJ/mol, which was in accordance with the activation energy for <TEX>$WO_3$</TEX> powder reduction of conventional micron-sized.
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