文献类型：期刊文献

英文题名：Pd/transition metal oxides functionalized ZSM-5 single crystals with b-axis aligned mesopores: Efficient and long-lived catalysts for benzene combustion

作者：Liu, Fujian[1,2]; Zuo, Shufeng[1]; Wang, Chao[1]; Li, Jiantao[3]; Xiao, Feng-Shou[2]; Qi, Chenze[1]

机构：[1] Key Laboratory of Alternative Technologies for Fine Chemicals Process of Zhejiang Province, Department of Chemistry, Shaoxing University, Shaoxing 312000, China; [2] Department of Chemistry, Zhejiang University, Hangzhou 310007, China; [3] Fushun Research Institute of Petroleum and Petrochemicals, SINOPEC, Fushun 113001, China

年份：2014

卷号：148-149

起止页码：106

外文期刊名：Applied Catalysis B: Environmental

收录：EI(收录号：20134717009558)、Scopus(收录号：2-s2.0-84887596890)

语种：英文

外文关键词：Benzene - Crystal structure - Single crystals - Zeolites - Self assembly - Transition metal oxides - Chromium compounds - Combustion - Catalyst activity - Catalytic oxidation - Transition metals

外文摘要：A series of PdO/transition metal oxides functionalized mesoporous ZSM-5 single crystals with b-axis aligned mesopores (x%Pd/x%M-ZSM-5-OMs) have been successfully prepared from self-assembly of the designed cationic amphiphilic copolymer of polystyrene-co-poly4-vinylpyridine (C-PSt-co-P4VP) with ZSM-5 zeolite precursor based on their strong positive-negative charge interaction under high temperature hydrothermal conditions. Characterizations of XRD patterns showed that x%Pd/x%M-ZSM-5-OMs exhibit good crystallinity with typical MFI zeolite characters; N2 isotherms showed that x%Pd/x%M-ZSM-5-OMs have large BET surface areas and mesopore volumes. SEM images showed the single crystal structure of x%Pd/x%M-ZSM-5-OMs, which have abundant and b-axis aligned mesopores, running through the whole zeolite crystals. TEM images further confirmed b-axis aligned mesopores, and good dispersion of active sites with high degree of crystallinity in x%Pd/x%M-ZSM-5-OMs. XPS spectra showed that transition metal oxides and PdO active species have been successfully loaded into ZSM-5-OM support. H2-TPR curves showed the low reduction temperatures of PdO and transition metal species in x%Pd/x%M-ZSM-5-OMs, which was favorable for the enhancement of their abilities for VOCs combustion. Catalytic tests showed that x%Pd/x%M-ZSM-5-OMs exhibit good catalytic activities and long catalytic lives for benzene combustion under rather mild conditions in comparison with that of x%Pd/x%M-ZSM-5, which would be very important for the wide applications of zeolites with controlled mesopores in the areas of VOCs oxidation. ? 2013 The Authors.