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利用探针分子ＣＯ在铜离子上吸附的原位红外光谱（ＩＲ）和电子自旋共振谱（ＥＰＲ）研究了不同预处理条件中抽空温度对ＣｕＯ／γ－Ａｌ２Ｏ３表面铜价态的影响，观测到室温时样品表面以Ｃｕ２＋为主，随着抽空温度Ｔｅｖａ的升高，表面的Ｃｕ２＋逐渐被还原为低价铜Ｃｕ＋和Ｃｕ０，Ｔｅｖａ＝２００℃时这种还原作用最强，再升高Ｔｅｖａ，表面铜的价态变化不明显．探针分子ＣＯ本身对Ｃｕ２＋也有还原作用，低于１００℃时还原作用很弱，在１００℃至２００℃之间还原作用随温度升高加剧，高于２００℃还原作用随温度变化不明显．对比两种还原作用，ＣＯ吸附还原作用比抽空还原作用强．
The effect of evacuation temperature on copper valence state on CuO / γ-Al2O3 surface under different preconditioning conditions was investigated by in situ IR and electron spin resonance (SERS) spectra of probe molecule CO adsorbed on copper ions. At room temperature, Cu2 + was the main sample surface. With the increase of evacuation temperature Teva, Cu2 + on the surface was gradually reduced to Cu + and Cu0. Cu2 + and Cu0 were the lowest at Teva = 200 ℃. Change in the price of copper is not obvious. The probe molecule CO itself also has a reduction effect on Cu2 +. When the temperature is below 100 ° C, the reduction effect is weak. The reduction at 100 ° C to 200 ° C aggravates with increasing temperature, and the reduction at 200 ° C does not change significantly with temperature. Compared with the two kinds of reduction, CO reduction and reduction are more effective than taking the time to empty.