title: A La-doped Mg-Al mixed metal oxide supported copper catalyst with enhanced catalytic performance in transfer dehydrogenation of 1-decanol.
abstract: In the present work, a La-doped Mg-Al mixed metal oxide supported copper catalyst (Cu/La-MgAlO) was synthesized through a layered double hydroxide precursor route. The materials were characterized by powder X-ray diffraction, transmission electron microscopy, CO2-temperature programmed desorption, Fourier transform infrared spectra of CO2 absorption, and X-ray photoelectron spectroscopy. The results revealed that the introduction of a trace amount of La could significantly improve the surface basicity of the Cu/La-MgAlO catalyst, especially strong Lewis basicity. Compared with the undoped supported Cu catalyst, Cu/La-MgAlO exhibited much higher activity and selectivity in the liquid-phase transfer dehydrogenation of 1-decanol with a 1-decanal yield up to 89%. The excellent catalytic efficiency was mainly ascribed to the surface cooperation between the Lewis basic sites and the adjacent Cu(0)/Cu(+) species. That is, basic sites, especially strong-strength basic sites, held the key to the abstraction of protons from the hydroxyl group in 1-decanol, while the adjacent Cu(0) and Cu(+) species were responsible for the hydrogen transfer and the adsorption of styrene in the transfer dehydrogenation and hydrogenation reactions, respectively. This study provides a new method for designing cost-effective supported copper-based catalysts highly efficient for the transfer dehydrogenation of primary aliphatic alcohols by modifying the surface basicity of metal oxide supports.
authors.affiliation: State Key Laboratory of Chemical Resources Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing, 100029, China. yanglan@mail.buct.edu.cn lifeng@mail.buct.edu.cn.
authors.forename: Ming
authors.initials: M
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Chemical Resources Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing, 100029, China. yanglan@mail.buct.edu.cn lifeng@mail.buct.edu.cn.
authors.forename: Yajie
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Chemical Resources Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing, 100029, China. yanglan@mail.buct.edu.cn lifeng@mail.buct.edu.cn.
authors.forename: Qian
authors.initials: Q
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Chemical Resources Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing, 100029, China. yanglan@mail.buct.edu.cn lifeng@mail.buct.edu.cn.
authors.forename: Lan
authors.initials: L
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Chemical Resources Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing, 100029, China. yanglan@mail.buct.edu.cn lifeng@mail.buct.edu.cn.
authors.forename: Guoli
authors.initials: G
authors.lastname: Fan
authors.affiliation: State Key Laboratory of Chemical Resources Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing, 100029, China. yanglan@mail.buct.edu.cn lifeng@mail.buct.edu.cn.
authors.forename: Feng
authors.initials: F
authors.lastname: Li