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Ordered Mesoporous CeO 2 ‐supported Ag as an Effective Catalyst for Carboxylative Coupling Reaction Using CO 2
Author(s) -
Zhang Xiao,
Wang Dingkun,
Jing Meizan,
Liu Jian,
Zhao Zhen,
Xu Guanhua,
Song Weiyu,
Wei Yuechang,
Sun Yuanqing
Publication year - 2019
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201900039
Subject(s) - high resolution transmission electron microscopy , mesoporous material , catalysis , x ray photoelectron spectroscopy , materials science , raman spectroscopy , adsorption , nanoparticle , chemical engineering , desorption , oxygen , mesoporous silica , inorganic chemistry , nanotechnology , chemistry , organic chemistry , transmission electron microscopy , physics , optics , engineering
Ag/Mesoporous CeO 2 (Ag/M−CeO 2 ) catalysts were synthesized through the gas bubbling‐assisted membrane reduction (GBMR) method and characterized by XRD, ICP‐OES, N 2 adsorption‐desorption, XPS, Raman spectroscopy, TEM, HRTEM, HAADF‐STEM and CO 2 ‐TPD. Ag/M−CeO 2 catalysts contain uniform mesoporous structure, large surface area and oxygen vacancies, which promote the dispersion of Ag nanoparticles. Density functional theory (DFT) calculations indicate that Ag nanoparticles supported on M−CeO 2 could facilitate the formation of oxygen vacancies, which result in higher CO 2 adsorption capacity. With the most oxygen vacancies and the well‐dispersed Ag active species, Ag (3.12 %)/M−CeO 2 exhibits high efficiency for the carboxylative coupling of terminal alkynes, chloride compounds and CO 2 under mild reaction conditions (60 °C, 0.5 MPa), affording a wide range of functionalized 2‐alkynoates in good yields.
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