Cu-Mn-Ce mixed oxides catalysts for soot oxidation and their mechanistic chemistry

2020 ◽  
Vol 512 ◽  
pp. 145602 ◽  
Author(s):  
Shafqat Ali ◽  
Xiaodong Wu ◽  
Zareen Zuhra ◽  
Yue Ma ◽  
Yasir Abbas ◽  
...  
Keyword(s):  
Mixed Oxides ◽  
Soot Oxidation

Catalytic Soot Oxidation Over Ce- and Cu-Doped Hydrotalcites-Derived Mesoporous Mixed Oxides

2014 ◽  
Vol 14 (9) ◽  
pp. 7087-7096 ◽  
Author(s):  
Zhongpeng Wang ◽  
Liguo Wang ◽  
Fang He ◽  
Zheng Jiang ◽  
Tiancun Xiao ◽  
...  
Keyword(s):  
Mixed Oxides ◽  
Soot Oxidation ◽  
Catalytic Soot Oxidation

scholarly journals Potential of Ceria-Zirconia-Based Materials in Carbon Soot Oxidation for Gasoline Particulate Filters

Catalysts ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 768
Author(s):  
Eleonora Aneggi ◽  
Alessandro Trovarelli
Keyword(s):  
Oxygen Vacancies ◽  
Mixed Oxides ◽  
Direct Injection ◽  
Soot Oxidation ◽  
Operating Conditions ◽  
Gasoline Direct Injection ◽  
Low Oxygen ◽  
Engine Exhaust ◽  
Partial Pressures ◽  
Carbon Soot

ZrO2 and Ce0.8Zr0.2O2 mixed oxides were prepared and tested in the oxidation of carbon soot at different oxygen partial pressures and degrees of catalyst/soot contact to investigate their activity under typical gasoline direct injection (GDI) operating conditions. Under reductive atmospheres, generation of oxygen vacancies occurs in Ce0.8Zr0.2O2, while no reduction is observed on ZrO2. Both materials can oxidize carbon under high oxygen partial pressures; however, at low oxygen partial pressures, the presence of carbon can contribute to the reduction of the catalyst and formation of oxygen vacancies, which can then be used for soot oxidation, increasing the overall performance. This mechanism is more efficient in Ce0.8Zr0.2O2 than ZrO2, and depends heavily on the interaction and the degree of contact between soot and catalyst. Thus, the ability to form oxygen vacancies at lower temperatures is particularly helpful to oxidize soot at low oxygen partial pressures, and with higher CO2 selectivity under conditions typically found in GDI engine exhaust gases.

scholarly journals Lattice oxygen activity in ceria-praseodymia mixed oxides for soot oxidation in catalysed Gasoline Particle Filters

2019 ◽  
Vol 245 ◽  
pp. 706-720 ◽  
Author(s):  
J.C. Martínez-Munuera ◽  
M. Zoccoli ◽  
J. Giménez-Mañogil ◽  
A. García-García
Keyword(s):  
Particle Filters ◽  
Mixed Oxides ◽  
Soot Oxidation ◽  
Lattice Oxygen ◽  
Oxygen Activity

NOx-assisted soot oxidation based on Ag/MnOx-CeO2 mixed oxides

2021 ◽  
pp. 118396
Author(s):  
Eun Jun Lee ◽  
Min June Kim ◽  
Jin Woo Choung ◽  
Chang Hwan Kim ◽  
Kwan-Young Lee
Keyword(s):  
Mixed Oxides ◽  
Soot Oxidation

MnOx–CeO2 mixed oxides for diesel soot oxidation: a review

2018 ◽  
Vol 22 (4) ◽  
pp. 230-240 ◽  
Author(s):  
Yuxi Gao ◽  
Xiaodong Wu ◽  
Shuang Liu ◽  
Duan Weng ◽  
Rui Ran
Keyword(s):  
Mixed Oxides ◽  
Soot Oxidation ◽  
Diesel Soot ◽  
Diesel Soot Oxidation

Oxygen activation on Cu/Mn–Ce mixed oxides and the role in diesel soot oxidation

2008 ◽  
Vol 139 (1-2) ◽  
pp. 113-118 ◽  
Author(s):  
Qing Liang ◽  
Xiaodong Wu ◽  
Duan Weng ◽  
Haibo Xu
Keyword(s):  
Mixed Oxides ◽  
Soot Oxidation ◽  
Oxygen Activation ◽  
Diesel Soot ◽  
Diesel Soot Oxidation

Determination of Mechanism for Soot Oxidation with NO on Potassium Supported Mg-Al Hydrotalcite Mixed Oxides

2011 ◽  
Vol 34 (11) ◽  
pp. 1864-1868 ◽  
Author(s):  
Y. Zhang ◽  
Q. Su ◽  
Q. Li ◽  
Z. Wang ◽  
X. Gao ◽  
...  
Keyword(s):  
Mixed Oxides ◽  
Soot Oxidation

The catalytic activity of CuO–CeO2 mixed oxides for diesel soot oxidation with a NO/O2 mixture

2007 ◽  
Vol 8 (12) ◽  
pp. 2110-2114 ◽  
Author(s):  
Xiaodong Wu ◽  
Qing Liang ◽  
Duan Weng ◽  
Zhenxiang Lu
Keyword(s):  
Catalytic Activity ◽  
Mixed Oxides ◽  
Soot Oxidation ◽  
Diesel Soot ◽  
Diesel Soot Oxidation

Promising ceria–samaria-based nano-oxides for low temperature soot oxidation: a combined study of structure–activity properties

2014 ◽  
Vol 38 (12) ◽  
pp. 5991-6001 ◽  
Author(s):  
Putla Sudarsanam ◽  
Kuncham Kuntaiah ◽  
Benjaram M. Reddy
Keyword(s):  
Low Temperature ◽  
Mixed Oxides ◽  
Soot Oxidation ◽  
Diesel Soot ◽  
Active Oxygen ◽  
Structure Activity ◽  
Diesel Soot Oxidation

Nanostructured Ce–Sm mixed oxides are promising catalysts for diesel soot oxidation through facile active oxygen participation.

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