Research on Chemical Intermediates p. 249 - 258 (2014)
Update date:2022-08-11
Topics:
Liu, Jing
Liao, Xuepin
Shi, Bi
Boehmite-supported Pd nanoparticles (Pd-TA-boehmite) were successfully synthesized by a hydrothermal method using tannic acid as the structure-directing agent as well as stabilizer. The physicochemical properties of the Pd-TA-boehmite catalyst were well characterized by XPS, XRD, N 2 adsorption/desorption, and TEM analyses. Catalytic hydrogenation of olefins was used as the probe reaction to evaluate the activity of the Pd-TA-boehmite catalyst. For comparison, the Pd-boehmite catalyst prepared without tannic acid was also employed for olefin hydrogenation. For all the investigated substrates, the Pd-TA-boehmite catalyst exhibited superior catalytic performance than the Pd-boehmite catalyst. For the example of hydrogenation of allyl alcohol, the initial hydrogenation rate and selectivity of the Pd-TA-boehmite catalyst were 23,520 mol/mol h and 99 %, respectively, while those of the Pd-boehmite catalyst were only 14,186 mol/mol h and 93 %, respectively. Additionally, the hydrogenation rate of the Pd-TA-boehmite catalyst could still reach 20,791 mol/mol h at the 7th cycle, which was much higher than that of the Pd-boehmite catalyst (5,250 mol/mol h) at the 4th cycle, thus showing an improved reusability.
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