Modified Ag/TiO2 systems: Promising catalysts for liquid-phase oxidation of alcohols

被引：15

作者：

Kolobova, E. ^{[1
]}

Kotolevich, Y. ^{[2
]}

Pakrieva, E. ^{[1
]}

Mamontov, G. ^{[3
]}

Farias, M. H. ^{[2
]}

Cortes Corberan, V. ^{[4
]}

Bogdanchikova, N. ^{[2
]}

Hemming, J. ^{[5
]}

Smeds, A. ^{[5
]}

Maki-Arvela, P. ^{[5
]}

Murzin, D. Yu. ^{[5
]}

Pestryakov, A. ^{[1
]}

机构：

[1] Tomsk Polytech Univ, Tomsk 634050, Russia

[2] Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, Ensenada 22860, Baja California, Mexico

[3] Tomsk State Univ, Tomsk 634050, Russia

[4] Spanish Council Sci Res CSIC, ICP, Madrid 28049, Spain

[5] Abo Akad Univ, Johan Gadolin Proc Chem Ctr, FI-20500 Turku, Finland

来源：

FUEL | 2018年 / 234卷

基金：

俄罗斯科学基金会;

关键词：

n-Octanol oxidation; Betulin oxidation; Alcohols selective oxidation; Silver catalysts; Silver active sites; Support modifiers; Effect of redox pretreatment; SELECTIVE OXIDATION; CARBON-MONOXIDE; LOW-TEMPERATURE; SILVER CATALYSTS; BENZYL ALCOHOL; GOLD NANOPARTICLES; AEROBIC OXIDATION; ALLYLIC ALCOHOLS; GREEN OXIDATION; CO OXIDATION;

D O I：

10.1016/j.fuel.2018.06.128

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The current work is the first study concerning the liquid-phase oxidation of n-octanol and betulin over modified and unmodified Ag/TiO2 catalysts. Catalytic activity of nanosilver catalysts supported on titania for alcohols selective oxidation can be enhanced by modification of the support with Ce, Fe or Mg oxides. In most cases reductive or oxidative pretreatments of these catalysts were detrimental for their activity. The main reason for performance of Ag/MxOy/TiO2 catalysts is changes of the electronic state of the supported Ag, and especially changes in the surface concentration of Ag+ ions. Monovalent Ag+ ions are active sites in silver-containing catalysts for n-octanol, as well as for betulin oxidation. The obtained results show a potential of silver-containing catalysts for liquid phase oxidation of alcohols, and by selecting the optimum modifier and the support as well as, pretreatment conditions the catalytic properties and stabilization of the active sites can be optimized.

引用

页码：110 / 119

页数：10

共 77 条

[71] Surface structure effects in nanocrystal MnO2 and Ag/MnO2 catalytic oxidation of CO [J].