Synergetic effect of bimetallic Au-Ru/TiO2 catalysts for complete oxidation of methanol

被引：67
作者：
Calzada, Lina A. [1 ]
Collins, Sebastian E. [2 ,3 ]
Han, Chang W. [4 ]
Ortalan, Volkan [4 ]
Zanella, Rodolfo [1 ]
机构：
[1] Univ Nacl Autonoma Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Circuito Exterior S-N,Ciudad Univ, Mexico City 04510, DF, Mexico
[2] Univ Nacl Litoral, Inst Desarrollo Tecnol Ind Quim INTEC, Guemes 3450, RA-3000 Santa Fe, Argentina
[3] Consejo Nacl Invest Cient & Tecn, Guemes 3450, RA-3000 Santa Fe, Argentina
[4] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2017年 / 207卷
关键词：
Methanol oxidation; Gold catalysts; Bimetallic; Ruthenium; Deposition-Precipitation; VOLATILE ORGANIC-COMPOUNDS; DEPOSITION-PRECIPITATION; CO OXIDATION; IR SPECTROSCOPY; CERIA-ZIRCONIA; GOLD PARTICLES; ACTIVE-SITES; ADSORPTION; COMBUSTION; AU;
D O I：
10.1016/j.apcatb.2017.01.081
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Bimetallic Ru-Au/TiO2 catalysts prepared by deposition-precipitation with urea method were tested for the first time in the total oxidation of methanol. Different Ru:Au atomic ratios were used (1:1-0.25:1). The catalytic activity results showed a synergetic effect at low temperature (RT-50 C-O), mainly for the 1:1 and 0.75:1 atomic ratio. HAADF-STEM and STEM-EDS characterization confirmed the interaction between Ru and Au. TPR, UV-vis spectra, XPS and DRIFTS-CO results also confirm this interaction. FTIR spectra, recorded following the oxidation of methanol as a function of the reaction temperature, showed that formates are the main reaction intermediates in the oxidation of methanol, which are formed from RT on bimetallic Ru-Au catalysts and are oxidized at lower temperatures compared to their monometallic Ru and Au counterparts. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：79 / 92
页数：14
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