CO oxidation and CO-PROX reactions over Au catalysts supported on different metal oxides: a comparative study

被引：7
|
作者：
Cruz, Aline R. M. [1 ]
Ramon, Adriana P. [1 ]
Gomes, Janaina F. [1 ]
Assaf, Jose M. [1 ]
机构：
[1] Univ Fed Sao Carlos, Dept Chem Engn, BR-13565905 Sao Carlos, SP, Brazil
来源：
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING | 2020年 / 37卷 / 04期
基金：
巴西圣保罗研究基金会;
关键词：
Gold nanoparticles; Supported catalysts; CO oxidation; CO-PROX; HIGHLY DISPERSED GOLD; PREFERENTIAL OXIDATION; CARBON-MONOXIDE; H-2; STREAM; SELECTIVE OXIDATION; BENZYL ALCOHOL; NANOPARTICLES; WATER; EPOXIDATION; ETHANOL;
D O I：
10.1007/s43153-020-00065-3
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Comparative research about the total CO oxidation and CO-PROX reaction over Au-based materials supported on different oxides was carried out. CeO2, MnO2, TiO(2)and SiO(2)with nominal content of 1 wt.% of Au were prepared by a modified deposition-precipitation method. The samples were characterized by XRF, XRD, BET, H-2-TPR and HR-TEM techniques. Catalytic results of the CO oxidation in the absence and presence of hydrogen showed that the supports and Au/SiO(2)were inactive. For the Au/MnO(2)and Au/TiO(2)samples, CO conversion was lower in the presence of H-2, while for Au/CeO(2)the conversion of CO in the CO-PROX was higher compared to that in the total CO oxidation. These results show that the impact of H(2)on CO oxidation over Au catalysts is dependent on the charactersitics of the materials that, in turn, are influenced by the nature of the support.
引用
收藏
页码：667 / 677
页数：11
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