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

页码：79 / 92

页数：14

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