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用 XPS研究了 Ni负载量对催化剂表面结构的影响 .选择负载量为 8%的 Ni/γ- Al2 O3催化剂 ,解迭出 Ni2 p3 /2 XPS,Eb(Ni O) =855.2 e V,Eb[Ni- O(T) ] =856.5 e V,Eb[Ni- O(O) ] =857.9e V;测定了不同温度通 H2 还原后吸附丙烯及不同温度吸附丙烯后 Ni2 p3 /2 及 C1 s XPS的变化 .对照EPR及 UV- DRS结果 ,推断丙烯在反应过程中形成 [Ni(C3H6 ) n] (1 -δ) +及 [Ni(C3H6 ) n] (2 -δ) + (n =1 ,2 )过渡态配位化合物 .
The effect of Ni loading on the surface structure of the catalyst was investigated by XPS. The Ni / γ-Al 2 O 3 catalyst with a loading of 8% was used to separate Ni 2 p 3/2 XPS, Eb (Ni O) = 855.2 e V, Eb [Ni The results show that the adsorption of propylene at different temperatures through H2 reduction and the adsorption of propylene at different temperatures and the adsorption of propylene on Ni2 p3 / 2 and C1 s XPS (Ni (C3H6) n] (1 -δ) + and [Ni (C3H6) n] (2 -δ) + (n = 1, 2 ) Transition state coordination compound.