Ni/γ-Al_2O_3催化剂上丙烯与Ni的相互作用——XPS EPR UV-DRS研究  

Interaction of Nickel Ions with Propylene Molecules on Ni/γ-Al_2O_3 Catalyst ——XPS, EPR and UV DRS Studies

作　　者：王秋莹[1] 翟宇恺[1] 李轶[1] 晁自胜[1] 杨保平[1] 罗继中[1] 阎子峰[1] 菅盘铭[1] 王水菊[2] 曾金龙[2] 

机构地区：[1]兰州大学化学化工学院,甘肃兰州730000 [2]厦门大学固体表面物理化学国家重点实验室,福建厦门361005

出　　处：《兰州大学学报（自然科学版）》2001年第1期51-58,共8页Journal of Lanzhou University(Natural Sciences)

基　　金：厦门大学固体表面物理化学国家重点实验室基金! (91 0 7)资助项目

摘　　要：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 .By using the XPS method, the effects of nickel weight loading as surface structure of NiSO 4/γ Al 2O 3 catalysts have been examined. For 8% Ni/γ Al 2O 3 catalysts,the XPS peak is deconvoluted to three nickel species: The E b (NiO)=855.2 eV, E b [Ni O(T)]=856.5 eV, E b [Ni O(O)]=857.9 eV. The XPS changes have been determined for catalysts having adsorbed H 2 or propylene at different temperature.. The XPS results in conjunction with the EPR and UV DRS resulted. Shown that the propylene adsorbed on Ni/γ Al 2O 3 catalysts results showed in the formation of nickel propylene complex such as [ Ni(C 3H 6) n ] (1 δ)+  and [ Ni(C 3H 6) n] (2 δ) + .

关 键 词：镍-丙烯过渡态配位化合物 结合能 镍/γ-氧化铝催化剂 吸附作用 表面结构 XPS EPR UV-DRS [Ni-O(T)] [Ni-O(O)] 

分 类 号：O643.37[理学—物理化学]