Nonprecious mixed oxide catalysts Co3AlO and Co2NiAlO derived from nanoflowerlike cobalt-based hydrotalcites for highly efficient oxidation of nitric oxide

RSC Advances ◽  
2016 ◽  
Vol 6 (111) ◽  
pp. 110274-110287 ◽  
Author(s):  
Ting Fan ◽  
Liguang Dou ◽  
Hui Zhang
Keyword(s):  
Nitric Oxide ◽  
Mixed Oxide ◽  
Active Sites ◽  
Oxide Catalysts ◽  
No Oxidation ◽  
Mixed Oxide Catalysts ◽  
Highly Efficient ◽  
Oxidation Performance

Nanoflowerlike Co3AlO-500 and Co2NiAlO-500 exhibit excellent NO oxidation performance upon abundant active sites Co3+/Ni3+–Oads through formation of bridged bidentate nitrate.

scholarly journals Low Temperature deNOx Catalytic Activity with C2H4 as a Reductant Using Mixed Metal Fe-Mn Oxides Supported on Activated Carbon

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4341 ◽  
Author(s):  
Fang Liu ◽  
Li Yang ◽  
Jie Cheng ◽  
Xin Wu ◽  
Wenbin Quan ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Low Temperature ◽  
Mixed Oxide ◽  
Active Sites ◽  
Mixed Oxides ◽  
Catalytic Reduction ◽  
Oxide Catalysts ◽  
Catalyst Stability ◽  
No Conversion ◽  
Mixed Oxide Catalysts

The selective catalytic reduction of NOx (deNOx) at temperatures less than or at 200 °C was investigated while using C2H4 as the reductant and mixed oxides of Fe and Mn supported on activated carbon; their activity was compared to that of MnOx and FeOx separately supported on activated carbon. The bimetallic oxide compositions maintained high NO conversion of greater than 80–98% for periods that were three times greater than those of the supported monometallic oxides. To examine potential reasons for the significant increases in activity maintenance, and subsequent deactivation, the catalysts were examined by using bulk and surface sensitive analytical techniques before and after catalyst testing. No significant changes in Brunauer-Emmett-Teller (BET) surface areas or porosities were observed between freshly-prepared and tested catalysts whereas segregation of FeOx and MnOx species was readily observed in the mono-oxide catalysts after reaction testing that was not detected in the mixed oxide catalysts. Furthermore, x-ray diffraction and Raman spectroscopy data detected cubic Fe3Mn3O8 in both the freshly-prepared and reaction-tested mixed oxide catalysts that were more crystalline after testing. The presence of this compound, which is known to stabilize multivalent Fe species and to enhance oxygen transfer reactions, may be the reason for the high and relatively stable NO conversion activity, and its increased crystallinity during longer-term testing may also decrease surface availability of the active sites responsible for NO conversion. These results point to a potential of further enhancing catalyst stability and activity for low temperature deNOx that is applicable to advanced SCR processing with lower costs and less deleterious side effects to processing equipment.

Decomposition of Nitric Oxide over Y–Ba–Cu–O Mixed Oxide Catalysts

1988 ◽  
Vol 17 (10) ◽  
pp. 1797-1800 ◽  
Author(s):  
Hiromichi Shimada ◽  
Susumu Miyama ◽  
Haruo Kuroda
Keyword(s):  
Nitric Oxide ◽  
Mixed Oxide ◽  
Oxide Catalysts ◽  
Mixed Oxide Catalysts

Inexpensive but Highly Efficient Co-Mn Mixed-Oxide Catalysts for Selective Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxylic Acid

ChemSusChem ◽  
2018 ◽  
Vol 11 (18) ◽  
pp. 3323-3334 ◽  
Author(s):  
Kasanneni Tirumala Venkateswara Rao ◽  
Jennifer Lorraine Rogers ◽  
Sadra Souzanchi ◽  
Luana Dessbesell ◽  
Madhumita Bhowmick Ray ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Mixed Oxide ◽  
Oxide Catalysts ◽  
Mixed Oxide Catalysts ◽  
Highly Efficient ◽  
Furandicarboxylic Acid

scholarly journals Surfactant-assisted synthesis of Mo–V mixed oxide catalysts for upgraded one-step conversion of glycerol to acrylic acid

RSC Advances ◽  
2018 ◽  
Vol 8 (22) ◽  
pp. 11975-11982 ◽  
Author(s):  
Letícia F. Rasteiro ◽  
Luiz H. Vieira ◽  
Celso V. Santilli ◽  
Leandro Martins
Keyword(s):  
Acrylic Acid ◽  
Mixed Oxide ◽  
Mixed Oxides ◽  
Oxide Catalysts ◽  
Mixed Oxide Catalysts ◽  
Highly Efficient ◽  
One Step ◽  
Surfactant Assisted

Rod-like crystals of Mo–V mixed oxides obtained by surfactant-assisted synthesis are very stable and highly efficient to one-step conversion of glycerol into acrylic acid.

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