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عنوان فارسی مقاله:
آماده سازی اسپینل کبالت مس و آلومینیوم مخلوط اکسیدها از هیدروکسیدهای دو لایه بندی شده برای اکسیداسیون کل بنزن
عنوان انگلیسی مقاله:
Preparation of cobalt-copper-aluminum spinel mixed oxides from layered double hydroxides for total oxidation of benzene
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Volatile organic compounds (VOCs) are recognized as the major components in air pollutants because of their toxicity to human health and their contribution to the formation of ozone and photochemical smog. Catalytic combustion is one of the most effective and economically feasible techniques for VOCs removal and great efforts have been made on the development of efficient catalysts [1,2]. Generally, noble metals such as Pt and Pd show good low-temperature activity for the total oxidation of VOCs, but their industrial application is greatly limited due to the high cost and low availability of noble metals. Thus, non-precious transition metal oxide catalysts have attracted much attention. Among the transition metal oxides, Co3O4 spinel has been shown to be an efficient catalyst for the total oxidation of VOCs [3–8]. However, in most cases, the activity of transition metal oxides is lower than that of noble metal catalysts. Therefore, the development of transition metal oxide catalyst with improved activity is highly desired. Using layered double hydroxides (LDHs) as precursor has been proved to be an effective way for the preparation of mixed metal oxides [9–13]. LDHs, also known as hydrotalcite-like compounds (HTlcs), are a class of two-dimensional anionic clays consisting of positively charged brucite-like layers and charge-compensating interlayer anions, which can be expressed by the formula [M2+1 − xM3+x(OH)2] x+(An−)x/n·mH2O. One attractive feature of LDHs is that upon calcination they are converted to mixed metal oxides (MMOs), which exhibit several interesting properties such as high surface area, small crystal size, good thermal stability, and basic character. Another attractive feature of LDHs is their versatility in chemical composition, which enables the preparation of various mixed metal oxides with tunable composition and structure. In a previous study [13], we prepared a series of Co-Al mixed oxides from Co-Al LDHs and found that Al3+ cations could be incorporated into the Co3O4 structure, which significantly modified the physicochemical property and the catalytic performance for the total oxidation of benzene. Herein, we report the preparation of Cu substituted Co-Al spinel mixed oxides from Co-Cu-Al LDHs. It was found that the incorporation of Cu2+ cations into the Co-Al spinel effectively enhanced the Co oxide reducibility and the catalytic activity for the total oxidation of benzene.
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کلمات کلیدی:
Cobalt aluminum mixed oxides prepared from layered double - TIB https://www.tib.eu/en/.../Cobalt-aluminum-mixed-oxides-prepared-from-layered/?tx... In benzene total oxidation, the activity of Co-Al mixed oxide increased with ... oxides prepared from layered double hydroxides for the total oxidation of benzene. [PDF]Reconstruction Effects on Surface Properties of Co/Mg/Al Layered ... matsc.ktu.lt/index.php/MatSc/article/viewFile/15184/8780 Layered double hydroxides (LDHs) are the commonly ... catalysts for the total oxidation of toluene. ... marked as Co/Mg/Al. The mixed-metal oxide obtained by. Sustainable Nanosystems Development, Properties, and Applications https://books.google.com/books?isbn=1522504931 Putz, Mihai V., Mirica, Marius Constantin - 2016 - Technology & Engineering Hexacyanoferrate-intercalated LDH-derived Fe-MgAlO mixed oxides were studied ... converted to methane and ethylene, in addition to total oxidation products. Formation of benzene from propene was also observed on the catalysts with higher ... oxides 92 Layered Double Hydroxides-Based Materials as Oxidation Catalysts. Preparation of cobalt-copper-aluminum spinel mixed oxides ... - ISI-dl isi-dl.com/item/138908 Preparation of cobalt-copper-aluminum spinel mixed oxides from layered double hydroxides for total oxidation of benzene. sciencedirect.com ... [PDF]Preparation of cobalt-copper-aluminum spinel mixed oxides from ... iranarze.ir/wp-content/uploads/2016/11/E2872.pdf layered double hydroxides for total oxidation of benzene. Dalin Li ... Mixed metal oxides Co5 − xCuxAl (x = 0–0.5) were prepared from Co-Cu-Al layered double ... Selective Catalytic Oxidation of H2S over Well-Mixed Oxides Derived ... pubs.acs.org/doi/abs/10.1021/cs500303y by X Zhang - 2014 - Cited by 15 - Related articles Apr 1, 2014 - Selective Catalytic Oxidation of H2S over Well-Mixed Oxides Derived from ... A series of Mg2AlxV1–x–LDH (LDH = layered double hydroxide) was ... View: ACS ActiveView PDF | PDF | PDF w/ Links | Full Text HTML .... on Layered Double Hydroxides for Selective Benzene Hydrogenation to Cyclohexene. Pillared Clays and Related Catalysts - Page 396 - Google Books Result https://books.google.com/books?isbn=1441966706 Antonio Gil, Sophia A. Korili, Raquel Trujillano - 2010 - Science ... mixed oxides via polyoxometalates intercalated layered double hydroxides. ... Fajula F, Dumitriu E (2006) Catalytic oxidation of thiophenes and thioethers with ... oxidation by oxygen of ethylbenzene to acetophenone and diphenylmethane to ... Mn-containing catalytic materials for the total combustion of toluene: the role ...
