AuRu/meso-Mn2O3: A Highly Active and Stable Catalyst for Methane Combustion

International Conference on Computer Information and Automation Engineering

计算机科学;运输工程

Han, Z.^1 ; Fang, J.Y.^1 ; Xie, S.H.^1 ; Deng, J.G.^1 ; Liu, Y.X.^1 ; Dai, H.X.^1

Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing

100124, China^1

关键词: Low-temperature reducibilities;    Methane combustion;    Methane conversions;    Ordered mesoporous;    Partial deactivation;    Physicochemical property;    Reaction temperature;    Stable catalysts;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/359/1/012022/pdf
DOI  :  10.1088/1757-899X/359/1/012022

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Three-dimensionally ordered mesoporous Mn2O3 (meso-Mn2O3) and its supported Au, Ru, and AuRu alloy (0.49 wt% Au/meso-Mn2O3, 0.48 wt% Ru/meso-Mn2O3, and 0.97 wt% AuRu/meso-Mn2O3 (Au/Ru molar ratio = 0.98)) nanocatalysts were prepared using the KIT-6-templating and polyvinyl alcohol-protected reduction methods, respectively. Physicochemical properties of the samples were characterized by means of numerous techniques, and their catalytic activities were evaluated for the combustion of methane. It is found that among all of the samples, 0.48 wt% Ru/meso-Mn 2O3 and 0.97 wt% AuRu/meso-Mn2O3 performed the best (the reaction temperature (T90% ) at 90% methane conversion was 530-540°C), but the latter showed a better thermal stability than the former. The partial deactivation of 0.97 wt% AuRu/meso-Mn2O3 due to H2O or CO2 introduction was reversible. It is concluded that the good catalytic activity and thermal stability of 0.97 wt% AuRu/meso-Mn2O3 was associated with the high dispersion of AuRu alloy NPs (2-5 nm) on the surface of meso-Mn2O3 and good low-temperature reducibility.