Enhancement of Catalytic Activities of Octahedral Molecular Sieve Manganese Oxide for Total and Preferential CO Oxidation through Vanadium Ion Framework Substitution

ChemCatChem ◽  
2013 ◽  
Vol 5 (8) ◽  
pp. 2306-2317 ◽  
Author(s):  
Homer C. Genuino ◽  
Yongtao Meng ◽  
Dayton T. Horvath ◽  
Chung-Hao Kuo ◽  
Mohammad S. Seraji ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Manganese Oxide ◽  
Molecular Sieve ◽  
Preferential Co Oxidation ◽  
Catalytic Activities ◽  
Vanadium Ion

scholarly journals Insights into the structure–property–activity relationship in molybdenum-doped octahedral molecular sieve manganese oxides for catalytic oxidation

2018 ◽  
Vol 8 (24) ◽  
pp. 6493-6502 ◽  
Author(s):  
Homer C. Genuino ◽  
Diego Valencia ◽  
Steven L. Suib
Keyword(s):  
Co Oxidation ◽  
Catalytic Oxidation ◽  
Molecular Sieve ◽  
Manganese Oxides ◽  
Activity Relationship ◽  
Computational Studies ◽  
Structure Property ◽  
Catalytic Activities ◽  
Mn Oxides

Experimental and computational studies on the properties of Mo-substituted octahedral molecular sieve Mn oxides provide insights into their excellent catalytic activities and stability for CO oxidation.

scholarly journals A one-pot synthesis of Fe-doped cryptomelane type octahedral molecular sieve manganese oxide for degradation of methylene blue dye

2019 ◽  
Vol 276 ◽  
pp. 06005 ◽  
Author(s):  
Amir Awaluddin ◽  
Riska Anggraini ◽  
Siti Saidah Siregar ◽  
Muhdarina ◽  
Prasetya
Keyword(s):  
Methylene Blue ◽  
Manganese Oxide ◽  
Molecular Sieve ◽  
Manganese Oxides ◽  
Sol Gel ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
One Pot ◽  
Catalytic Activities ◽  
One Pot Synthesis

The Fe-doped octahedral molecular sieve manganese oxides have been successfully synthesized by one-pot synthesis of the reaction between KMnO4 and glucose using sol-gel methods. The oxide products are then characterized by various techniques such as X-ray diffraction, scanning electron microscopy, atomic absorption spectroscopy and average oxidation state (AOS) of manganese in manganese oxides. The as-synthesized manganese oxide and Fe-doped manganese oxides are used as catalysts for the degradation of methylene blue dye using hydrogen peroxide as oxidants. The results indicated that the Fe-doped manganese oxide catalyst displayed much enhanced catalytic activities compared to undoped manganese oxide for methylene blue degradation. The differences in catalytic activities have been correlated with the difference in surface properties and crystallinity.

scholarly journals Catalytic Elimination of Carbon Monoxide, Ethyl Acetate, and Toluene over the Ni/OMS-2 Catalysts

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 581
Author(s):  
Ning Dong ◽  
Mengyue Chen ◽  
Qing Ye ◽  
Dan Zhang ◽  
Hongxing Dai
Keyword(s):  
Ethyl Acetate ◽  
Molecular Sieve ◽  
Space Velocity ◽  
Oxidation Of Co ◽  
Toluene Oxidation ◽  
Catalytic Activities ◽  
Catalytic Mechanisms ◽  
Ni Species ◽  
Synthesized Materials ◽  
Incorporation Method

The Ni-loaded cryptomelane-type manganese oxide octahedral molecular sieve (OMS-2) catalysts (xNi/OMS-2: x = 1, 3, 5, and 10 wt%) were prepared by a pre-incorporation method. Physicochemical properties of the as-synthesized materials were characterized by means of various techniques, and their catalytic activities for CO, ethyl acetate, and toluene oxidation were evaluated.The loading of Ni played an important role in improving physicochemical propertiesof OMS-2. Among all of the samples, 5Ni/OMS-2 exhibited the best catalytic activity, with the T90 being 155 °C for CO oxidation at a space velocity (SV) of 60,000 mL/(g·h), 225°C for ethyl acetate oxidation at an SV of 240,000 mL/(g·h), and 300 °C for toluene oxidation at an SV of 240,000 mL/(g·h), which was due to its high Mn3+ content and Oads concentration, good low-temperature reducibility and lattice oxygen mobility, and strong interaction between the Ni species and the OMS-2 support. In addition, catalytic mechanisms of the oxidation of three pollutants over 5Ni/OMS-2 were also studied. The oxidation of CO, ethyl acetate, and toluene over the catalysts took place first via the activated adsorption, then intermediates formation, and finally complete conversion of the formed intermediates to CO2 and H2O.

Peroxymonosulfate activation and pollutants degradation over highly dispersed CuO in manganese oxide octahedral molecular sieve

2017 ◽  
Vol 422 ◽  
pp. 754-762 ◽  
Author(s):  
Jun Li ◽  
Peng Ye ◽  
Jia Fang ◽  
Manye Wang ◽  
Deming Wu ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Molecular Sieve ◽  
Highly Dispersed
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