Hierarchically Hollow MnO2@CeO2 Heterostructures for NO Oxidation: Remarkably Promoted Activity and SO2 Tolerance

ACS Catalysis ◽  
2021 ◽  
Vol 11 (17) ◽  
pp. 10988-10996
Author(s):  
Lei Chen ◽  
Chen Zhang ◽  
Yuxin Li ◽  
Chun-Ran Chang ◽  
Chi He ◽  
...  
Keyword(s):  
No Oxidation ◽  
So2 Tolerance

The synergistic effects between Ce and Cu in CuyCe1−yW5Ox catalysts for enhanced NH3-SCR of NOx and SO2 tolerance

2019 ◽  
Vol 9 (3) ◽  
pp. 718-730 ◽  
Author(s):  
Jian-Wen Shi ◽  
Yao Wang ◽  
Ruibin Duan ◽  
Chen Gao ◽  
Baorui Wang ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Selective Catalytic Reduction ◽  
Low Temperatures ◽  
Catalytic Reduction ◽  
Synergistic Effects ◽  
Reduction Of No ◽  
Nh3 Scr ◽  
So2 Tolerance ◽  
Scr Of Nox

Non-manganese-based metal oxides are promising catalysts for the NH3-SCR (selective catalytic reduction) of NOx at low temperatures.

Effect of doping Cr on NH3 adsorption and NO oxidation over the FexOy/AC surface: a DFT-D study

2021 ◽  
pp. 125798
Author(s):  
Chaoyue Xie ◽  
Baozhong Zhu ◽  
Yunlan Sun ◽  
Weiyi Song ◽  
Minggao Xu
Keyword(s):  
No Oxidation ◽  
Nh3 Adsorption ◽  
Effect Of Doping

scholarly journals The Influence Of NO/O2 On The NOx Storage Properties Over A Pt-Ba-Ce/γ-Al2O3 Catalyst

2019 ◽  
Vol 17 (1) ◽  
pp. 1459-1465
Author(s):  
Xuedong Feng ◽  
Jing Yi ◽  
Peng Luo
Keyword(s):  
Sol Gel ◽  
Chemical Properties ◽  
No Oxidation ◽  
Test Results ◽  
X Ray Diffraction ◽  
Storage Performance ◽  
Transmission Electron ◽  
Temperature Programmed ◽  
Physical And Chemical ◽  
Al2o3 Catalyst

AbstractWith the purpose of studying the influence of NO/O2 on the NOx storage activity, a Pt-Ba-Ce/γ-Al2O3 catalyst was synthesized by an acid-aided sol-gel method. The physical and chemical properties of the catalyst were characterized by X-ray diffraction (XRD) and Transmission Electron Microscope (TEM) methods. The results showed that the composition of the catalyst was well-crystallized and the crystalline size of CeO2 (111) was about 5.7 nm. The mechanism of NO and NO2 storage and NOx temperature programmed desorption (NO-TPD) experiments were investigated to evaluate the NOx storage capacity of the catalyst. Pt-Ba-Ce/γ-Al2O3 catalyst presented the supreme NOx storage performance at 350℃, and the maximum value reached to 668.8 μmol / gcat. Compared with O2-free condition, NO oxidation to NO2 by O2 had a beneficial effect on the storage performance of NOx. NO-TPD test results showed that the NOx species stored on the catalyst surface still kept relatively stable even below 350℃.

Study of TiO2 anatase nano and microstructures with dominant {001} facets for NO oxidation

2012 ◽  
Vol 19 (9) ◽  
pp. 3719-3726 ◽  
Author(s):  
Maria-Veronica Sofianou ◽  
Christos Trapalis ◽  
Vassils Psycharis ◽  
Nikos Boukos ◽  
Tiverios Vaimakis ◽  
...  
Keyword(s):  
No Oxidation ◽  
Tio2 Anatase

Hollow MnOx-CeO 2 mixed oxides as highly efficient catalysts in NO oxidation

2017 ◽  
Vol 322 ◽  
pp. 46-55 ◽  
Author(s):  
Qun Shen ◽  
Lingyun Zhang ◽  
Nannan Sun ◽  
Hui Wang ◽  
Liangshu Zhong ◽  
...  
Keyword(s):  
Mixed Oxides ◽  
No Oxidation ◽  
Highly Efficient

Nb2O5-modified Mn-Ce/AC catalyst with high ZnCl2 and SO2 tolerance for low-temperature NH3-SCR of NO

2021 ◽  
Vol 9 (5) ◽  
pp. 106323
Author(s):  
Yuhan Zhou ◽  
Buxin Su ◽  
Shan Ren ◽  
Zhichao Chen ◽  
Zenghui Su ◽  
...  
Keyword(s):  
Low Temperature ◽  
Nh3 Scr ◽  
Scr Of No ◽  
So2 Tolerance

Improved Activity and H2O Resistance of Cu-Modified MnO2 Catalysts for NO Oxidation

2018 ◽  
Vol 57 (3) ◽  
pp. 920-926 ◽  
Author(s):  
Chuanning Shi ◽  
Huazhen Chang ◽  
Chizhong Wang ◽  
Tao Zhang ◽  
Yue Peng ◽  
...  
Keyword(s):  
No Oxidation

scholarly journals REGULATORY MECHANISMS OF CELLULAR RESPIRATION

1950 ◽  
Vol 34 (2) ◽  
pp. 211-224 ◽  
Author(s):  
E. S. Guzman Barron ◽  
Maria Isabel Ardao ◽  
Marion Hearon
Keyword(s):  
Acetic Acid ◽  
Pyruvic Acid ◽  
No Oxidation ◽  
Yeast Cells ◽  
Acid Formation ◽  
Cellular Respiration ◽  
Acid Oxidase ◽  
Acid Solutions ◽  
Fluoroacetic Acid ◽  
A Cell

The rate of the aerobic metabolism of pyruvic acid by bakers' yeast cells is determined mainly by the amount of undissociated acid present. As a consequence, the greatest rate of oxidation was observed at pH 2.8. Oxidation, at a slow rate, started at pH 1.08; at pH 9.4 there was no oxidation at all. The anaerobic metabolism, only a fraction of the aerobic, was observed only in acid solutions. There was none at pH values higher than 3. Pyruvic acid in the presence of oxygen was oxidized directly to acetic acid; in the absence of oxygen it was metabolized mainly by dismutation to lactic and acetic acids, and CO2. Acetic acid formation was demonstrated on oxidation of pyruvic acid at pH 1.91, and on addition of fluoroacetic acid. Succinic acid formation was shown by addition of malonic acid. These metabolic pathways in a cell so rich in carboxylase may be explained by the arrangement of enzymes within the cell, so that carboxylase is at the center, while pyruvic acid oxidase is located at the periphery. Succinic and citric acids were oxidized only in acid solutions up to pH 4. Malic and α-ketoglutaric acids were not oxidized, undoubtedly because of lack of penetration.

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