催化学报 ›› 2016, Vol. 37 ›› Issue (10): 1771-1775.DOI: 10.1016/S1872-2067(16)62512-3

• 论文 • 上一篇    下一篇

Au-Ir催化剂用于生物质衍生物加氢

Lorenzo Landennaa, Alberto Villaa, Rodolfo Zanellab, Claudio Evangelistic, Laura Pratia   

  1. a 米兰大学化学系, 米兰 20133, 意大利;
    b 墨西哥国立自治大学科学应用与技术开发中心, 墨西哥城 04510, 墨西哥;
    c 意大利国家研究委员会分子科学技术研究所, 米兰 20138, 意大利
  • 收稿日期:2016-05-11 修回日期:2016-07-09 出版日期:2016-10-21 发布日期:2016-10-22
  • 通讯作者: Laura Prati

Gold-iridium catalysts for the hydrogenation of biomass derived products

Lorenzo Landennaa, Alberto Villaa, Rodolfo Zanellab, Claudio Evangelistic, Laura Pratia   

  1. a Dipartimento di Chimica, Università degli Studi di Milano, Via C. Golgi 19, 20133 Milano, Italy;
    b Centro de Ciencias Aplicadas y Desarrollo Technologico, Universidad Nacional Autonoma de Mexico, Mexico City 04510, Mexico;
    c Istituto di Scienze e Tecnologie Molecolari ISTM-CNR, Via G. Fantoli 16/15, 20138 Milano, Italy
  • Received:2016-05-11 Revised:2016-07-09 Online:2016-10-21 Published:2016-10-22
  • Contact: Laura Prati

摘要:

采用沉积-沉淀法制备了TiO2负载的Au-Ir和Au-Ru催化剂,用于乙酰丙酸加氢制γ-戊内酯反应,并与相应的单金属催化剂性能进行了比较.有趣的是,Ir/TiO2中添加Au抑制了催化剂活性,而添加Ru则表现出正效应的协同作用.这两个催化剂均在H2中还原,使得M0-Au0间相互作用增强.结合以前的密度泛函理论计算和催化反应结果,我们认为,Au-Ir/TiO2催化剂活性低于Ir/TiO2催化剂是由于Au影响了Ir原子的氧化还原过程.

关键词: 乙酰丙酸加氢, 金-铱催化剂, 金-钌催化剂, γ-戊内酯, 协同效应

Abstract:

Au-Ir and Au-Ru on TiO2 catalysts prepared by sequential deposition-precipitation technique were compared with the corresponding monometallics in the hydrogenation of levulinic acid to γ-valerolactone. Interestingly the addition of Au to Ir/TiO2 showed a detrimental effect on the activity of Ir monometallic catalyst whereas a positive synergistic effect was shown in the case of Ru. Both catalysts were reduced under H2 to increase the M0-Au0 interaction. From previous DFT calculations and catalytic test, we addressed the lower activity of Au-Ir/TiO2 than that of Ir/TiO2 to the interference of Au into the redox mechanism of Ir atoms.

Key words: Levulinic acid hydrogenation, Gold-irdium catalyst, Gold-ruthenium catalyst, γ-Valerolactone, Synergistic effect