Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 266, Issue -, Pages 64-74Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2018.02.042
Keywords
Selective oxidation; Catalytic reduction; ZrSBA-15; Metal-support interaction; Pd nanoparticles; Reusability
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Funding
- National Natural Science Foundation of China [21676039, 21776026]
- Opening Foundation of State Key Laboratory of Inorganic Synthesis and Preparative Chemistry of Jilin University [2016-04]
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Through hydrothermal synthesis and impregnation-reduction processes, a series of Pd-based nanocomposites using N-doped carbon layers coated ZrSBA-15 as the supports have been manufactured, aiming to upgrade the catalytic activity and stability of the catalysts. Pentaethylenehexamine (PEHA) was served as a nitrogen source to generate N-doped carbon (CN) layers that were pre-deposited into the acidic platelet framework ZrSBA-15, and then followed by introducing Pd-0 nanoparticles (NPs) onto it, finally leading to the formation of target composite Pd/CN-ZrSBA-15. The samples were characterized by XRD, TEM, SEM, N-2 adsorption-desorption isotherm, FUR, XPS etc. The catalytic performance of as-prepared catalysts was evaluated by the aerobic oxidation of benzyl alcohol and the reduction of 4-NP, respectively. Duo to the platelet-like morphology with shortened channels and the modification of N-doped carbon layers, which could effectively decrease pore blocking in the process of preparation and reactions as well as enhance the metal-support interaction, the derived catalysts could afford 85% conversion of benzyl alcohol and 100% selectivity of benzaldehyde, and the conversion of 4-NP was also up to 96%. More remarkably, the catalysts could be reused at least ten times without significantly loss in catalytic activity.
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