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论文类型：期刊论文

发表时间：2020-08-01

发表刊物：CATALYSIS LETTERS

收录刊物：SCIE

卷号：150

期号：8

页面范围：2150-2157

ISSN号：1011-372X

关键字：Schiff base; Selective hydrogenation; 2-Butyne-1; 4-diol; 2-Butene-1; 4-diol; Palladium catalyst

摘要：Schiff-base modified Pd nanoparticles (NPs) supported on silica with an average size of ca. 2 nm have been synthesized via a one-pot aldimine condensation followed by impregnation-reduction of a palladium precursor, and the sample exhibits an excellent catalytic activity and selectivity in hydrogenation of 2-butyne-1,4-diol (BYD) to 2-butene-1,4-diol (BED). Under the mild reaction conditions (50 degrees C, 2 MPa H-2, and 4 h) and additive-free, 95.2% BYD conversion has been achieved with ca. 100% BED selectivity over the Pd/SiO2-Schiff catalyst, and the Pd/SiO2-Schiff catalyst presents an excellent catalytic stability. The above results are much better than that of commercial Lindlar catalyst, and the improved catalytic performance is attributed to the strong metal-support interaction derived from the coordination of nitrogen sites (Schiff-base) to Pd NPs, based on catalyst characterization results. Graphic Featured by additive-free and high selectivity, hydrogenation of 2-butyne-1,4-diol to 2-butene-1,4-diol over the Pd/SiO2-Schiff catalyst has been developed, aiming for green production of fine chemicals.
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