A new highly active La<sub>2</sub>O<sub>3</sub>–CuO–MgO catalyst for the synthesis of cumyl peroxide by catalytic oxidation

Liu, HanShuang; Wang, Kaijun; Cao, Xiaoyan; Su, Jiaxin; Gu, Zhenggui

doi:10.1039/d1ra00176k

Cited by 12 publications

(9 citation statements)

References 56 publications

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“…But, role of CuO oxide can't be neglected, which can provide the surface lattice oxygen to enhance the oxidation of reaction. [37,38] Therefore, this CnHO activity and CnHO selectivity is due to synergetic effect of spinal and oxide present in the catalyst. Catalytic activity exhibited by co-precipitation method having lower Cu 2 + site, is correlated with the contribution of surface oxygen to the reaction (Figure 3c).…”

Section: Resultsmentioning

confidence: 99%

Catalytic Activity of CuFe₂O₄ Spinel Oxide for Liquid‐Phase Oxidation of Cinnamyl Alcohol

et al. 2022

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CuFe 2 O 4 spinel oxide catalyst was synthesized by sol-gel and co-precipitation methods for liquid phase oxidation of Cinnamyl alcohol (CnOH) to Cinnamaldehydes (CnHO) using tert-Butyl hydroperoxide (TBHP) as oxidising agent. Spinel oxide catalyst was characterized by different techniques such as X-ray diffraction (XRD), N 2 adsorption-desorption, BET surface area, and X-ray photoelectron spectroscopy (XPS) to understand the structural, physical properties and oxidation state of the catalyst. The result shows that catalyst prepared by sol-gel method was found higher surface area and smaller crystalline size than co-precipitation method. XPS data confirm the formation of Cu 2 + in the spinel which helps to improve the catalytic activity of oxidation. This reaction follows radical mechanism, and exhibited 76.7 % of CnOH conversion and 68.4 % of CnHO, and 24.8 % benzaldehyde (benzald) selectivity using TBHP at 60 °C. Kinetic data reveal that 41.2 kJ/mol of activation energy for the reaction. The higher activity of spinel oxide catalyst could be due synergetic effect of spinel (88 %) and oxides (12 %) formed in the catalyst, which helps to provide the oxygen during reaction. The contribution of Cu 2 + is higher in sol-gel than co-precipitation, which may provide the better reactivity of catalyst. This work helps to select the effective and cost-effective catalyst for the oxidation of CnOH.

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Section: Resultsmentioning

confidence: 99%

Catalytic Activity of CuFe₂O₄ Spinel Oxide for Liquid‐Phase Oxidation of Cinnamyl Alcohol

et al. 2022

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“…Quantitative calculations of the surface lattice oxygen ratio O α /(O α +O β +−OH) are also presented in Table 2, where the high surface lattice oxygen ratio (27.84 %) was found for HTC‐0.8La. It is worth noting that lattice oxygen is related to the presence of strong base sites on the catalyst surface, and higher lattice oxygen favors the adsorption of ethanol on the catalyst surface [36] …”

Section: Resultsmentioning

confidence: 99%

“…It is worth noting that lattice oxygen is related to the presence of strong base sites on the catalyst surface, and higher lattice oxygen favors the adsorption of ethanol on the catalyst surface. [36] The TG-DTG curves of the HT-0La and HT-0.8La samples are shown in Figure 5. For HT-0La samples, TG curves show three major weight losses: 30-204 °C (adsorbed water), 204-400 °C (bound water, hydroxyl groups and carbonate) and 400-750 °C (further removal of hydroxyl groups and carbonate).…”

Section: Catalystmentioning

confidence: 99%

La‐Doped Mg‐Al Composite Oxides: Efficient Catalysts for the synthesis of Diethyl Carbonate via Transesterification of Ethylene Carbonate with Ethanol

Wang,

Pan,

Jiang

et al. 2024

ChemistrySelect

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Series of La‐doped Mg−Al composite oxides were prepared by co‐precipitation method and used as catalysts for the synthesis of diethyl carbonate (DEC) via transesterification of ethylene carbonate (EC) with ethanol (EtOH). SEM, XRD, FT‐IR and XPS results confirmed that the introduction of La enhanced the interaction with MgO. The 8 mol % La‐doped Mg−Al composite oxide (calcined catalyst named HTC‐0.8 La) produced strong interactions and improved lattice oxygen content (27.84 %). Based on the N2 adsorption‐desorption and CO2‐TPD results, the HTC‐0.8 La catalysts possessed abundant multistage mesoporous structure, high strong base density and strength (0.941 mmol ⋅ g−1). Therefore, the HTC‐0.8La catalyst exhibited high catalytic activity with 58.5 % yield of DEC and 94.7 % selectivity to DEC (EC: EtOH molar ratio=1 : 6, reaction time=1.5 h, reaction temperature=150 °C and catalyst amount=3.2 wt %). Based on the correlation between catalytic activity and alkalinity, the yield of DEC was positively and linearly related to the strong alkali density of the catalyst. After five replicate experiments, the DEC yield after recovery and roasting reached 54.1 %, indicating that HTC‐0.8La is a renewable heterogeneous catalyst.

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“…Specifically, the region between 2 θ angles 30–40° displayed peaks corresponding to (0 0 2), (−1 1 1), (2 0 0), and (1 1 1) of CuO in addition to MgO peaks. 56–58 Cu and Mg have similar ionic radii (73 and 72 Å, respectively) and this causes both the solid solution of MgO and CuO as well as a separate CuO nanoparticle phase to form in this catalyst. 56,57 The mesoporous structure of the catalyst material is evident from the type IV isotherm observed by nitrogen physisorption shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…56–58 Cu and Mg have similar ionic radii (73 and 72 Å, respectively) and this causes both the solid solution of MgO and CuO as well as a separate CuO nanoparticle phase to form in this catalyst. 56,57 The mesoporous structure of the catalyst material is evident from the type IV isotherm observed by nitrogen physisorption shown in Fig. 2(b).…”

Section: Resultsmentioning

confidence: 99%

Treatment of emerging contaminants in simulated wastewater via tandem photo-Fenton-like reaction and nutrient recovery

Silva

Eisa

Ragauskaitė

et al. 2023

Environ. Sci.: Water Res. Technol.

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A new highly active La₂O₃–CuO–MgO catalyst for the synthesis of cumyl peroxide by catalytic oxidation

Abstract: The La2O3–CuO–MgO catalyst acts on the oxidation of cumene and shows excellent catalytic activity through the coordination of surface and interior.

Cited by 12 publications

References 56 publications

Catalytic Activity of CuFe₂O₄ Spinel Oxide for Liquid‐Phase Oxidation of Cinnamyl Alcohol

Catalytic Activity of CuFe₂O₄ Spinel Oxide for Liquid‐Phase Oxidation of Cinnamyl Alcohol

La‐Doped Mg‐Al Composite Oxides: Efficient Catalysts for the synthesis of Diethyl Carbonate via Transesterification of Ethylene Carbonate with Ethanol

Treatment of emerging contaminants in simulated wastewater via tandem photo-Fenton-like reaction and nutrient recovery

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A new highly active La2O3–CuO–MgO catalyst for the synthesis of cumyl peroxide by catalytic oxidation

Abstract: The La2O3–CuO–MgO catalyst acts on the oxidation of cumene and shows excellent catalytic activity through the coordination of surface and interior.

Cited by 12 publications

References 56 publications

Catalytic Activity of CuFe2O4 Spinel Oxide for Liquid‐Phase Oxidation of Cinnamyl Alcohol

Catalytic Activity of CuFe2O4 Spinel Oxide for Liquid‐Phase Oxidation of Cinnamyl Alcohol

La‐Doped Mg‐Al Composite Oxides: Efficient Catalysts for the synthesis of Diethyl Carbonate via Transesterification of Ethylene Carbonate with Ethanol

Treatment of emerging contaminants in simulated wastewater via tandem photo-Fenton-like reaction and nutrient recovery

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A new highly active La₂O₃–CuO–MgO catalyst for the synthesis of cumyl peroxide by catalytic oxidation

Catalytic Activity of CuFe₂O₄ Spinel Oxide for Liquid‐Phase Oxidation of Cinnamyl Alcohol

Catalytic Activity of CuFe₂O₄ Spinel Oxide for Liquid‐Phase Oxidation of Cinnamyl Alcohol