scholarly journals Mn-based catalysts supported on γ-Al2O3, TiO2 and MCM-41: a comparison for low-temperature NO oxidation with low ratio of O3/NO

RSC Advances ◽  
2021 ◽  
Vol 11 (31) ◽  
pp. 18945-18959
Author(s):  
Lijun Liu ◽  
Boxiong Shen ◽  
Meng Si ◽  
Peng Yuan ◽  
Fengju Lu ◽  
...  
Keyword(s):  
Low Temperature ◽  
No Oxidation ◽  
Adsorbed Oxygen ◽  
Excellent Performance ◽  
No Conversion ◽  
Mcm 41

The Mn/γ-Al2O3 catalyst exhibited excellent performance for NO conversion in the presence of a low ratio of O3/NO, which was due to the coexistence of Mn3+ and Mn4+ and abundant chemically adsorbed oxygen.

Low-temperature NO oxidation using lattice oxygen in Fe-site substituted SrFeO3−δ

2020 ◽  
Vol 22 (42) ◽  
pp. 24181-24190
Author(s):  
Kazuki Tamai ◽  
Saburo Hosokawa ◽  
Kazuo Kato ◽  
Hiroyuki Asakura ◽  
Kentaro Teramura ◽  
...  
Keyword(s):  
Fine Structure ◽  
Low Temperature ◽  
Lattice Oxygen ◽  
No Oxidation ◽  
Oxygen Release ◽  
X Ray ◽  
Absorption Fine ◽  
Perovskite Catalysts ◽  
X Ray Absorption

The dynamics of lattice oxygen release from perovskite catalysts during NO oxidation was investigated by dispersive X-ray absorption fine structure.

scholarly journals Effect of loading sequence between Cu and Fe on SCR-C3H6 performance for Al-PILC based bimetallic catalysts

2021 ◽  
Vol 2079 (1) ◽  
pp. 012009
Author(s):  
Nini Wen ◽  
Jianghao Cheng ◽  
Yaxin Su ◽  
Mingtao Hu ◽  
Wenyi Deng ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Bimetallic Catalysts ◽  
Active Phase ◽  
Adsorbed Oxygen ◽  
No Conversion ◽  
Loading Sequence

Abstract To investigate the effect of impregnation sequence on SCR-C3H6 performance, Al-PILC based catalysts with different impregnation sequences between Cu and Fe were prepared. Activity result showed that impregnation sequence influenced the SCR-C3H6 performance, where, the NO conversion followed the order from high to low: Cu-Fe/Al-PILC>FeCu/Al-PILC>CuFe/Al-PILC. XRD results indicated that the dispersion of the active phase was related to the impregnation sequence. The specific surface area was not the crucial factor affecting the activity. UV-Vis demonstrated that isolated Cu2+ and Fe3+ contributed to activity rather than CuO and Fe2O3 particles, and more isolated Cu2+ and Fe3+ existed on Cu-Fe/Al-PILC. H2-TPR and XPS results revealed that superior reduction ability and more surface adsorbed oxygen led to the excellent SCR-C3H6 performance for Cu-Fe/Al-PILC catalyst.

Medium-Low-Temperature NO2 Sensor Based on YSZ Solid Electrolyte and Mesoporous WO3 Sensing Electrode for Detection of Vehicle Emissions

NANO ◽  
2021 ◽  
pp. 2150083
Author(s):  
Cheng Zhang ◽  
Chuning Jiang ◽  
Xiaohong Zheng ◽  
Xin Hong
Keyword(s):  
Low Temperature ◽  
Electromotive Force ◽  
Electrochemical Impedance ◽  
Yttria Stabilized Zirconia ◽  
Mixed Potential ◽  
Stabilized Zirconia ◽  
Excellent Performance ◽  
Hard Template ◽  
No2 Sensor ◽  
Hard Template Method

A mixed potential-type NO2 sensor was fabricated using yttria-stabilized zirconia (YSZ) as the electrolyte and mesoporous WO3 as the sensing electrode for the detection of NO2 in vehicle exhausts. The mesoporous WO3 with a diameter of 7 nm was synthesized using the hard template method. The sensor showed excellent performance in the detection of 30–500[Formula: see text]ppm of NO2 at 300∘C and 500∘C. However, commercial WO3 only operate well at 500∘C. The response of the mesoporous WO3 was higher and the test temperature was lower compared to that of commercial WO3. XPS combined with NO2-TPD was used to explain the high activity of mesoporous WO3 at medium-low temperature, and the mechanism of mixed electromotive force was verified by electrochemical impedance spectroscopy. Furthermore, the sensor exhibited high NO2 selectivity in the presence of interfering gases, such as NO, CO, CO2 and NH3. Most importantly, the sensor had excellent repeatability and stability.

Facile in situ Encapsulation of Highly Dispersed Ni@MCM-41 for the Trans-Decalin Production from Hydrogenation of Naphthalene at Low Temperature

ChemCatChem ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 1286-1294 ◽  
Author(s):  
Xiaoyun Song ◽  
Qingxin Guan ◽  
Yu Shu ◽  
Xiaojing Zhang ◽  
Wei Li
Keyword(s):  
Low Temperature ◽  
Highly Dispersed ◽  
Mcm 41

Superior low-temperature NO catalytic performance of PrMn2O5 over SmMn2O5 mullite-type catalysts

2019 ◽  
Vol 9 (11) ◽  
pp. 2758-2766 ◽  
Author(s):  
Sampreetha Thampy ◽  
Nickolas Ashburn ◽  
Chengfa Liu ◽  
Ka Xiong ◽  
Sean Dillon ◽  
...  
Keyword(s):  
Low Temperature ◽  
Catalytic Performance ◽  
No Oxidation

PrMn2O5 is demonstrated as a superior catalyst compared to SmMn2O5 for low temperature NO oxidation, both experimentally and theoretically.

scholarly journals Catalytic oxidation of NO over MnOx–CoOx/TiO2 in the presence of a low ratio of O3/NO: activity and mechanism

RSC Advances ◽  
2020 ◽  
Vol 10 (41) ◽  
pp. 24493-24506
Author(s):  
Meng Si ◽  
Boxiong Shen ◽  
Lijun Liu ◽  
Haohao Zhang ◽  
Wenjun Zhou ◽  
...  
Keyword(s):  
Low Temperature ◽  
Catalytic Oxidation ◽  
No Oxidation ◽  
Oxidation Of No

O3 promotes the formation of monodentate nitrates at low temperature, thus improving the efficiency of NO oxidation.

Highly dispersed Fe2O3 on carbon nanotubes for low-temperature selective catalytic reduction of NO with NH3

2015 ◽  
Vol 51 (5) ◽  
pp. 956-958 ◽  
Author(s):  
Zhenping Qu ◽  
Lei Miao ◽  
Hui Wang ◽  
Qiang Fu
Keyword(s):  
Carbon Nanotubes ◽  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Low Temperatures ◽  
Catalytic Reduction ◽  
Reduction Of No ◽  
No Conversion ◽  
Highly Dispersed

Highly dispersed Fe2O3 nanoparticles supported on CNTs showed excellent NO conversion, selectivity and durability towards SO2/H2O at low temperatures (200–325 °C).

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