Pd NPs supported on N-doped carbon layer coated ZrSBA-15 for efficient heterogeneous catalysis reactions

• Published in: Microporous and mesoporous materials Vol. 266; pp. 64 - 74
• Main Authors: Meng, Yan-Yun, An, Qing-Da, Xiao, Zuo-Yi, Zhai, Shang-Ru, Shi, Zhan
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.08.2018
• Subjects: Catalytic reduction; Metal-support interaction; Pd nanoparticles; Reusability; Selective oxidation; ZrSBA-15; Selective oxidation; Catalytic reduction; Metal-support interaction; Pd nanoparticles; Reusability; ZrSBA-15
• ISSN: 1387-1811; 1873-3093
• DOI: 10.1016/j.micromeso.2018.02.042

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 Pd0 nanoparticles (NPs) onto it, finally leading to the formation of target composite Pd/CN-ZrSBA-15. The samples were characterized by XRD, TEM, SEM, N2 adsorption-desorption isotherm, FTIR, 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. [Display omitted] •Pd-based nanocomposites were fabricated using N-doped carbon layers coated ZrSBA-15.•Synergy of N-doped carbon layers and ZrSBA-15 toward metal dispersion and stabilization.•The N-doped carbon layers considerably increased the metal-support interaction.•Excellent catalytic activity and recyclability for benzyl alcohol oxidation and 4-NP reduction.