Catalytic oxidation of vinyl chloride over Co–Ce composite oxides derived from ZIF-67 template: Effect of cerium incorporation

Zhang, Hongliang; Shuo-ming, Wang; Wang, Mingju; Li, Guanghao; Yu, Lihang; Liu, Xuehua; Wang, Zhong; Zhang, Chuanhui

doi:10.1016/j.jre.2022.12.006

Cited by 19 publications

(5 citation statements)

References 54 publications

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“…The obtained values for the activation energy were in the 86–92 kJ mol –1 range for the Ru-promoted catalysts and about 70 kJ mol –1 for the parent cobalt oxides, quite similar for all the samples, which evidenced that the reaction mechanism was the same irrespective of the investigated catalyst. These E a values were comparable with those reported in the literature for the combustion of chlorinated VOCs over Co 3 O 4 and Ru-promoted Co 3 O 4 catalysts ,− (Table ). Since all the catalysts exhibited a relatively comparable value of the apparent activation energy, the ratio between the values of the pre-exponential factor was taken as an indication of the relative activity of the studied oxides.…”

Section: Resultssupporting

confidence: 90%

Promotion of Cobalt Oxide Catalysts by Acid-Etching and Ruthenium Incorporation for Chlorinated VOC Oxidation

Gil-Barbarin,

Gutiérrez-Ortiz,

López-Fonseca

et al. 2024

Ind. Eng. Chem. Res.

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In this work, Ru-promoted cobalt oxide catalysts with a nanotube morphology were prepared by a synthesis route based on the Kirkendall effect followed by an acid treatment and subsequent optimized Ru impregnation. The resulting samples were thoroughly characterized by means of N 2 physisorption, X-ray energy-dispersive spectroscopy, X-ray diffraction, scanning electron microscopy techniques, X-ray photoelectron spectroscopy, and temperature-programmed techniques (O 2 -temperature-programmed desorption, H 2 -temperature-programmed reduction, and temperature-programmed oxidation) and evaluated in the gas-phase oxidation of 1,2-dichloroethane. It has been demonstrated that Ru addition improves the oxygen mobility as well as the amount of Co 2+ and O ads species at the surface by the formation of the Ru−O−Co bond, which in turn governs the performance of the catalysts in the oxidation reaction. Moreover, the acid-etching favors the dispersion of the Ru species on the surface of the catalysts and strengthens the interaction among the noble metal and the cobalt oxide, thereby improving the thermal stability of the Ru-promoted oxides. Thus, the resulting catalysts are not only active, as the chlorinated pollutant is efficiently converted into deep oxidation products at relatively low temperatures, but also quite stable when operating for 120 h.

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Section: Resultssupporting

confidence: 90%

Promotion of Cobalt Oxide Catalysts by Acid-Etching and Ruthenium Incorporation for Chlorinated VOC Oxidation

Gil-Barbarin,

Gutiérrez-Ortiz,

López-Fonseca

et al. 2024

Ind. Eng. Chem. Res.

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“…It is reported in the literature that a number of metals improve catalytic activity and conductivity . For example, cobalt and cerium catalysts have high activity and stability . In addition, iron, chromium, titanium, and manganese play important roles in catalytic reactions and have high affinity for hydrogen storage .…”

Section: Introductionmentioning

confidence: 99%

“… 3 For example, cobalt and cerium catalysts have high activity and stability. 11 In addition, iron, chromium, titanium, and manganese play important roles in catalytic reactions and have high affinity for hydrogen storage. 12 Moreover, ZIF-8 with transition-metal oxides has been applied in a variety of industries.…”

Section: Introductionmentioning

confidence: 99%

Preparation, Characterization, and Application of Metal Oxide-Doped Zeolitic Imidazolate Framework

Kümbetlioğlu,

Oskay,

Çıplak

et al. 2023

ACS Omega

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Metal–organic frameworks (MOFs) attract the attention of researchers due to their unique properties, such as high surface area, porosity, and stability. Therefore, in this study, the synthesis of zeolitic imidazole frameworks (ZIF-8), a subclass of MOFs, and copper oxide (Cu2O) and manganese oxide (MnO2) containing ZIF-8 was carried out by a mixing method with methanol. The characterization results show that the polyhedral structure of ZIF-8 was prepared with a surface area of 2088 m2/g and a crystallite size of 43.48 nm. Then, each and mixture of two metal oxides were introduced into the ZIF-8 crystal structure. It was found that the surface area and pore volumes of all metal/ZIF-8 samples decreased with metal loading, depending on the type and ratio of metal oxides. The ZIF-8 containing 4.0 wt % Cu2O and 1.0 wt % MnO2 had the highest surface area (2084 m2/g), which was closest to that of ZIF-8. The polyhedral structure was maintained by the addition of both metal oxides, and the crystal size of the material decreased with the loading of MnO2 to the ZIF-8 structure. All of the synthesized samples were analyzed in supercapacitor applications and a relatively higher value of specific capacitance was obtained for Cu–Mn/ZIF-8 due to higher surface area and improved conductivity. In addition to supercapacitor applications, the properties of metal/ZIF-8 are also promising for applications such as catalysts, membranes, and gas storage.

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“…From the XPS of high-resolution Co 2p, peaks at 803.68 eV and 785.18 eV in W-CoO/NF correspond to Sat, while the main peaks of binding energy of 797.38 eV and 781.38 eV are attributed to Co 2p 1/2 and Co 2p 3/2 , respectively. 36–39 After selenization, the peak positions of W-CoSe300/NF are 802.68 eV and 785.08 eV and the peak positions of Co 2p 1/2 and Co 2p 3/2 are 796.68 eV and 780.68 eV (Fig. 3c).…”

Section: Resultsmentioning

confidence: 96%

Engineering hierarchical snowflake-like multi-metal selenide catalysts anchored on Ni foam for high-efficiency and stable overall water splitting

Fan,

Zhou,

Zhao

et al. 2024

Dalton Trans.

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Catalytic oxidation of vinyl chloride over Co–Ce composite oxides derived from ZIF-67 template: Effect of cerium incorporation

Cited by 19 publications

References 54 publications

Promotion of Cobalt Oxide Catalysts by Acid-Etching and Ruthenium Incorporation for Chlorinated VOC Oxidation

Promotion of Cobalt Oxide Catalysts by Acid-Etching and Ruthenium Incorporation for Chlorinated VOC Oxidation

Preparation, Characterization, and Application of Metal Oxide-Doped Zeolitic Imidazolate Framework

Engineering hierarchical snowflake-like multi-metal selenide catalysts anchored on Ni foam for high-efficiency and stable overall water splitting

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