研究了外界条件对Cu-ZnO/SiO_2催化剂在甲醇脱氢合成甲酸甲酯反应中活性的影响.使用X射线粉末衍射法、红外光谱一程序升温热脱附法等手段对催化剂进行了表征.结果表明,还原前的Cu-ZnO/SiO_2催化剂中只有CuO和ZnO物相,还原活化后的CuO-ZnO/siO_2催化剂中,CuO被还原成Cu,ZnO被部分地还原;催化剂表面只有L酸中心,没有B酸中心,甲醇的吸附发生在L酸中心上. The effects of external conditions on the catalytic activity of Cu-ZnO / SiO 2 catalysts for the reaction of methyl formate with methanol dehydrogenation were investigated. The catalysts were characterized by X-ray powder diffraction and FTIR-temperature-programmed desorption. Results It is shown that only the CuO and ZnO phases are present in the Cu-ZnO / SiO 2 catalyst before reduction. In the CuO-ZnO / SiO 2 catalyst after reduction and activation, CuO is reduced to Cu and ZnO is partially reduced. The catalyst surface has only L acid sites, Without the B acid center, methanol adsorption occurs on the L acid center.