文献类型：期刊文献

英文题名：Synergistic Enhancement of Catalytic Activity in USY Zeolites Via Selective Aluminum Removal and Cerium Doping for Aniline Condensation

作者：Li, Yanyao[1];Mao, Lingyi[1];Xiao, Kexin[1];Liu, Naiwang[1];Shi, Li[1];Wang, Xin[1];Meng, Xuan[1]

机构：[1]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy Chem Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：155

期号：7

外文期刊名：CATALYSIS LETTERS

收录：;EI(收录号：20252318549658);WOS:【SCI-EXPANDED(收录号:WOS:001502168000004)】；

语种：英文

外文关键词：USY zeolite; Condensation of aniline; Acid modification; Dealumination effect; Cerium doping

摘要：This study proposes a novel strategy to enhance the catalytic performance of USY zeolites through selective aluminum extraction using tartaric acid and cerium substitution, with a focus on their application in the condensation of aniline with diphenylamine. A comprehensive characterization approach encompassing XRD, BET, and SEM analysis revealed that treatment with 0.1 mol/L tartaric acid led to the effective removal of aluminum atoms from the zeolite framework, concurrently generating new micropores. This process resulted in a substantial enhancement in the accessibility of the reactants. Infrared spectroscopy of pyridine confirmed that the addition of 5% cerium compensated for the loss of aluminum by supporting the lattice and modulating the acid strength distribution. The optimized 0.1TA-5% Ce-USY catalyst achieved 14.3% aniline conversion at 320 degrees C, outperforming the majority of reported catalysts under comparable conditions. The combined modification produced a synergistic effect: the acid treatment created additional diffusion channels, while cerium doping stabilized the acid sites. This dual strategy not only maintained the structural integrity of the zeolite (92% crystallinity as determined by XRD), but also opened up new avenues for the design of highly efficient acid catalysts. These findings offer a comprehensive approach for designing highly efficient acid catalysts by selective elemental modification, with a broad spectrum of potential applications.