Enhanced hydrogen storage capacity of copper containing mesoporous silicas prepared using different methods

Sekkiou, H.; Boukoussa, Bouhadjar; Ghezini, Rachid; Khenchoul, Zineb; Ouali, Affaf; Hamacha, Rachida; Bengueddach, Abdelkader

doi:10.1088/2053-1591/3/8/085501

Cited by 16 publications

(4 citation statements)

References 23 publications

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“…All MnLUS catalysts revealed four well-resolved peaks corresponding to the diffraction caused by the lattice planes (100), (110), (200), and (210) which is characteristic of mesoporous silica with a well-ordered hexagonal porous array [27,28]. e distance between two adjacent pore centers in the hexagonal structure of LUS and the lattice parameters (a o ) are gathered in Table 1, and all the above results are in good agreement with the literature results [29,30].…”

Section: Resultssupporting

confidence: 87%

Structural and Oxidative Properties of Manganese Incorporated Mesostructure Silica for Methane Oxidation

Dardouri

Gannouni

Zina

2019

Advances in Materials Science and Engineering

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Manganese catalysts containing templated mesostructured porous silica were prepared using different methods of preparation, namely, the direct hydrothermal (DHT), solid-state ion exchange (SSI), template ion exchange (TIE), and impregnation (Imp) methods. The physical-chemical properties of materials were characterized by X-ray diffraction (XRD), N2 adsorption-desorption, FT-IR, TEM, EDX, UV-Vis, EPR, and H2 TPR techniques. The results of this study indicate that the obtained catalysts retained their hexagonal mesopore structure after introducing Mn into MCM-41. On the contrary, the crystalline phase of manganese oxide was stabilized on the external surface and inside the mesoporosity of the MCM-41 and seems to be dependent on the synthesis method used. Catalytic performances of synthesized materials were then investigated in methane oxidation at atmospheric pressure. The results showed that the metal loading and catalysts synthesis procedure influence the catalytic performance of the obtained materials. Moreover, the activity of the catalyst depends on the crystalline phase and particularly on the environment of the active phase.

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Section: Resultssupporting

confidence: 87%

Structural and Oxidative Properties of Manganese Incorporated Mesostructure Silica for Methane Oxidation

Dardouri

Gannouni

Zina

2019

Advances in Materials Science and Engineering

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“…Although from Table , it is seen that P5 powder has lower pore wall thickness, the rupturing of mesopore structure upon the application of high sonication energy makes it a very low surface area powder. Figure shows the comparison of H 2 adsorption capacity of SBA‐15 powders synthesized in this work with other reported values of hydrogen adsorption by other different materials . It is clear that the present result of hydrogen adsorption capacity of the high surface area powder P4 is higher than the reported value till date.…”

Section: Resultsmentioning

confidence: 54%

Synthesis of high surface area mesoporous silica SBA‐15 for hydrogen storage application

Bera

Das

2018

Int J Applied Ceramic Tech

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In the present report, mesoporous silica SBA‐15 was synthesized by different methods such as room temperature aging, hydrothermal, and sonication‐mediated hydrothermal methods. The effect of different time and temperature on the synthesis method was investigated by conventional characterization techniques. The powders synthesized by different methods showed different properties, mainly in morphology and pore volume. In comparison to others, the powder synthesized by the hydrothermal method at 100°C for 48 hours showed exceptionally high surface area of 3274 m2/g. To date, as per our knowledge, no such value was reported in literature. Finally, the powders were characterized by H2 storage capacity by the adsorption‐desorption method using 99.999% H2. The hydrogen adsorption capacity of the same powder was observed at 6.02 wt%. Also, this value seems to be the highest H2 adsorption capacity in comparison to other powders described in literature.

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“…The introduction of Cu, Zn, Fe and Cr in MCM-41 results in significant changes in the corresponding UV-Vis spectra ( Figure 2). The catalyst Cu/MCM-41 displays two clear bands, an intense band at 219 nm and a wide band between 300-800 nm that are mainly due to the presence of Cu 2+ in form of CuO NPs [51,52]. Zn/MCM-41 catalyst is characterized by two bands, the first is located at 257 nm and the second and wide band located at 305 nm, which can be assigned to encapsulated ZnO NPs [53,54].…”

Section: Characterization Of the Catalystmentioning

confidence: 99%

Metal-Loaded Mesoporous MCM-41 for the Catalytic Wet Peroxide Oxidation (CWPO) of Acetaminophen

et al. 2021

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MCM-41 based catalysts (molar ratio Si/Al = 40) were prepared by a hydrothermal route, modified by ionic exchange with different metals (Cu, Cr, Fe and Zn) and finally calcined at 550 °C. The catalysts were fully characterized by different techniques that confirmed the formation of oxides of the different metals on the surfaces of all materials. Low-angle X-ray diffraction (XRD) analyses showed that calcination resulted in the incorporation of metallic Zn, Fe and Cr in the framework of MCM-41, while in the case of Cu, thin layers of CuO were formed on the surface of MCM-41. The solids obtained were tested in the catalytic wet peroxide oxidation (CWPO) of acetaminophen at different temperatures (25–55 °C). The activity followed the order: Cr/MCM-41 ≥ Fe/MCM-41 > Cu/MCM-41 > Zn/MCM-41. The increase of the reaction temperature improved the performance and activity of Cr/MCM-41 and Fe/MCM-41 catalysts, which achieved complete conversion of acetaminophen in short reaction times (15 min in the case of Cr/MCM-41). Fe/MCM-41 and Cr/MCM-41 were submitted to long-term experiments, being the Fe/MCM-41 catalyst the most stable with a very low metal leaching. The leaching results were better than those previously reported in the literature, confirming the high stability of Fe/MCM-41 catalysts synthesized in this study.

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Enhanced hydrogen storage capacity of copper containing mesoporous silicas prepared using different methods

Cited by 16 publications

References 23 publications

Structural and Oxidative Properties of Manganese Incorporated Mesostructure Silica for Methane Oxidation

Structural and Oxidative Properties of Manganese Incorporated Mesostructure Silica for Methane Oxidation

Synthesis of high surface area mesoporous silica SBA‐15 for hydrogen storage application

Metal-Loaded Mesoporous MCM-41 for the Catalytic Wet Peroxide Oxidation (CWPO) of Acetaminophen

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