锌修饰的负载型金催化剂催化醇气相氧化  

Zinc-modified Supported Gold Catalyst for Catalytic Gas Phase Oxidation of Alcohols

作　　者：周宇恒 Zhou Yuheng(Chongqing University,Chongqing,400044)

机构地区：[1]重庆大学,重庆400044

出　　处：《当代化工研究》2024年第9期61-63,共3页Modern Chemical Research

摘　　要：以十二烷基硫醇保护的纳米金作为金源,并借助锌修饰的碳纳米管,成功制备了Au/ZnO/C催化剂。通过在固定床反应器中研究该催化剂在苯甲醇气相选择性氧化反应中的影响,建立了相应的动力学模型。实验结果显示,Au/ZnO/C复合结构有助于促进氧气的活化。在金锌比例为1:1的条件下,于773 K焙烧得到的催化剂在H_(2)/Ar气氛中展现出高达40000 h^(-1)的活性。动力学研究进一步表明,锌修饰的负载金催化剂提高了氧气的活化程度,提升了催化性能,并在醇氧化反应中降低了活化能。Gold nanoparticles,using dodecyl mercaptan as the protective agent,served as the gold source.Au-Zn/C catalysts were prepared by loading these gold nanoparticles onto zinc-modified carbon nanotubes.Characterization involved TEM,and XRD.The impact of these catalysts on gas-phase benzyl alcohol oxidation was thoroughly explored in a fixed-bed reactor,with a kinetic model established.Results indicated enhanced oxygen activation capacity due to the gold-zinc heterojunction structure.A 1:1 gold-to-zinc ratio,under H_(2)/Ar atmosphere,at 773 K calcination,produced the most active catalyst.The kinetic model demonstrated an increase in catalytic activity up to 40000 h^(-1) on Au-Zn/C catalysts,which is attributed to enhanced oxygen activation and reduced activation energy.

关 键 词：氧化锌 金纳米颗粒 复合结构 气相醇氧化 

分 类 号：O643.11[理学—物理化学] O643.32[理学—化学] O643.36