Operando FT-IR study on basicity improvement of Ni(Mg, Al)O hydrotalcite-derived catalysts promoted by glow plasma discharge

被引：15
作者：
Debek, R. [1 ,2 ]
Wierzbicki, D. [2 ,3 ]
Motak, M. [2 ]
Galvez, M. E. [3 ]
Da Costa, P. [3 ]
Azzolina-Jury, F. [1 ]
机构：
[1] Normandie Univ, UNICAEN, CNRS, Lab Catalyse & Spectrochim, F-14000 Caen, France
[2] AGH Univ Sci & Technol, Fac Energy & Fuels, Dept Fuels Technol, 30 A Mickiewicza Av, PL-30059 Krakow, Poland
[3] Sorbonne Univ, Inst Jean Le Rond dAlembert, CNRS UMR 7190, 2 Pl Gare Ceinture, F-78210 St Cyr Lecole, France
来源：
PLASMA SCIENCE & TECHNOLOGY | 2019年 / 21卷 / 04期
关键词：
plasma; glow discharge; basicity; hydrotalcite; carbon dioxide; ASSISTED CO2 HYDROGENATION; LAYERED DOUBLE HYDROXIDES; LOW-TEMPERATURE; MIXED OXIDES; EMISSION-SPECTROSCOPY; CARBON-DIOXIDE; METAL-OXIDES; METHANATION; CE; ZEOLITES;
D O I：
10.1088/2058-6272/aaf759
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
CO2 adsorption on the surface of hydrotalcite-derived mixed oxide catalysts was investigated under low pressure glow discharge plasma in operando conditions via FT-IR spectroscopy. Nickel catalysts were promoted with various transition metal species (Ce, Fe, La, Zr) to influence their physico-chemical properties. Fe and Zr species were successfully incorporated into hydrotalcite brucite layers. After calcination formed a single phase with Ni(Mg, Al) O mixed oxide, while La and Ce species formed separate phases. This had a consequence in the distribution of surface basic sites as well as in the affinity to CO produced upon CO2 dissociation in plasma. Plasma treatment activated the surface of prepared materials and changed their properties via the generation of strong basic sites associated with low coordinated surface oxygen anions. Moreover, the CO2 adsorption capacity of prepared materials increased after plasma treatment.
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页数：14
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