Selective styrene oxidation on alkaline tantalates ATaO3 (A = Li, Na, K) as heterogeneous catalysts

被引：20
作者：
Marchena, Candelaria Leal [1 ]
Pecchi, Gina A. [2 ,3 ]
Pierella, Liliana B. [1 ]
机构：
[1] UTN CONICET, Ctr Invest & Tecnol Quim CITeQ, RA-5016 Cordoba, Argentina
[2] Univ Concepcion, Fac Chem Sci, Edmund Larenas 129, Concepcion, Chile
[3] Millenium Nuclei Catalyt Proc Sustainable Chem CS, Santiago, Chile
来源：
CATALYSIS COMMUNICATIONS | 2019年 / 119卷
关键词：
Perovskite; Alkaline tantalates; Styrene; Benzaldehyde; PHOTOCATALYTIC ACTIVITY; PEROVSKITE; BENZALDEHYDE; TRANSITION; CO; COMPLEXES; PEROXIDE; OXIDES; CERIUM; CU;
D O I：
10.1016/j.catcom.2018.10.016
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：
A series of alkaline tantalates (LiTaO3, NaTaO3, KTaO3) prepared using citrate method were characterized by powder X-ray diffraction, nitrogen adsorption isotherms, Fourier transform infrared spectroscopy, diffuse reflectance spectroscopy-UV-Vis and differential thermogravimetric analysis techniques and evaluated as heterogeneous catalysts in selective oxidation of styrene towards benzaldehyde. An increase in the catalytic activity was observed with the atomic radii of the alkaline cation, attributed to the detected crystalline perovskite structure and presence of segregated phases. The largest styrene conversion (58.4 mol%) and benzaldehyde selectivity (77 mol%) was obtained for KTaO3 with no significant loss of activity after six catalytic reuses.
引用
收藏
页码：28 / 32
页数：5
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