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CuO作为催化剂的主要活性组分已应用于氧化、加氢、CO和碳氢化合物的燃烧,N0x还原等多种催化反应中,有关N0、CO在CuO上吸附的红外光谱研究已有一些报导.London和Bell曾研究CO和NO在CuO/SiO_2上的反应,他们根据红外光谱和动力学测量结果推测NO主要离解吸附于Cu~0上,而CO则吸附在Cu~+或Cu~(2+)上.Busca在未还原的CuO样品上,观测到CO在Cu~+上的红外吸收峰最强,从而认为体相为CuO的样品,铜在其表面主要由Cu~+并伴以Cu~(2+)构成.本文研究了CuO/γ-Al_2O_3上NO、CO单独、交替和共吸附时的低温红外光谱,证明当NO和CO共存时,NO选择吸附于Cu~(2+)上,而CO选择吸附于Cu~+上。
CuO as the main active component of the catalyst has been used in oxidation, hydrogenation, CO and hydrocarbon combustion, N0x reduction and other catalytic reactions, the N0, CO adsorption on CuO infrared spectra have been reported. London and Bell studied the reaction of CO with NO on CuO / SiO 2. They estimated that NO mainly dissociated and adsorbed on Cu ~ 0 based on IR and kinetic measurements, whereas CO adsorbed on Cu ~ + or Cu ~ (2+ ) .Busca on the unreduced CuO samples observed the strongest infrared absorption peak of CO on Cu ~ +, so that the bulk of the sample is CuO, copper on its surface mainly by the Cu ~ + with Cu ~ (2+) .In this paper, the low temperature infrared spectra of NO and CO on CuO / γ-Al 2 O 3 were investigated by single, alternating and co-adsorption. It was proved that NO selectively adsorbed on Cu 2+ when NO and CO co- While CO is selectively adsorbed on Cu ~ +.