MOF-derived metal oxide composite Mn2Co1Ox/CN for efficient formaldehyde oxidation at low temperature

2019 ◽  
Vol 9 (20) ◽  
pp. 5845-5854 ◽  
Author(s):  
Xi Wang ◽  
Jiawei Ying ◽  
Yuliang Mai ◽  
Junjie Zhang ◽  
Jiazhi Chen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Metal Oxide ◽  
Low Temperature Oxidation ◽  
Carbon Catalyst ◽  
Temperature Oxidation ◽  
Oxide Composite ◽  
Formaldehyde Oxidation

A novel MOF-derived MnCoOx nanoparticles embedded in porous N-doped carbon catalyst exhibits excellent catalytic activity for the low-temperature oxidation of formaldehyde.

scholarly journals Influence of Co-Precipitation Agent on the Structure, Texture and Catalytic Activity of Au-CeO2 Catalysts in Low-Temperature Oxidation of Benzyl Alcohol

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 641
Author(s):  
Lukasz Wolski ◽  
Grzegorz Nowaczyk ◽  
Stefan Jurga ◽  
Maria Ziolek
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Low Temperature ◽  
Benzyl Alcohol ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Oxidation Of Benzyl Alcohol ◽  
Key Factor ◽  
Au Particle Size ◽  
Co Precipitation

The aim of the study was to establish the influence of a co-precipitation agent (i.e., NaOH–immediate precipitation; hexamethylenetetramine/urea–gradual precipitation and growth of nanostructures) on the properties and catalytic activity of as-synthesized Au-CeO2 nanocomposites. All catalysts were fully characterized with the use of XRD, nitrogen physisorption, ICP-OES, SEM, HR-TEM, UV-vis, XPS, and tested in low-temperature oxidation of benzyl alcohol as a model oxidation reaction. The results obtained in this study indicated that the type of co-precipitation agent has a significant impact on the growth of gold species. Immediate co-precipitation of Au-CeO2 nanostructures with the use of NaOH allowed obtainment of considerably smaller and more homogeneous in size gold nanoparticles than those formed by gradual co-precipitation and growth of Au-CeO2 nanostructures in the presence of hexamethylenetetramine or urea. In the catalytic tests, it was established that the key factor promoting high activity in low-temperature oxidation of benzyl alcohol was size of gold nanoparticles. The highest conversion of the alcohol was observed for the catalyst containing the smallest Au particle size (i.e., Au-CeO2 nanocomposite prepared with the use of NaOH as a co-precipitation agent).

Hydrophobic Polymer-Coated Metal Oxide Catalysts for Effective Low-Temperature Oxidation of CO under Moisture-Rich Conditions

2010 ◽  
Vol 22 (11) ◽  
pp. 3313-3315 ◽  
Author(s):  
Chun-Hu Chen ◽  
Eric C. Njagi ◽  
Shih-Po Sun ◽  
Homer Genuino ◽  
Boxun Hu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Metal Oxide ◽  
Oxide Catalysts ◽  
Metal Oxide Catalysts ◽  
Oxidation Of Co ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Hydrophobic Polymer ◽  
Coated Metal

Catalytic activity and thermal stability of Au–CuO/SiO2 catalysts for the low temperature oxidation of CO in the presence of propylene and NO

2014 ◽  
Vol 231 ◽  
pp. 15-21 ◽  
Author(s):  
J. Chris Bauer ◽  
Todd J. Toops ◽  
Yatsandra Oyola ◽  
James E. Parks II ◽  
Sheng Dai ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Catalytic Activity ◽  
Low Temperature ◽  
Oxidation Of Co ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Thermal Stability Of

Charaterization and Catalytic Activity of CuO and NiO Supported on ZrO2 for CO Low Temperature Oxidation

2013 ◽  
Vol 842 ◽  
pp. 237-241 ◽  
Author(s):  
Zhi Chen ◽  
Yi Long Xie ◽  
Jin Xing Qiu ◽  
Zhong He Chen
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Co Oxidation ◽  
High Activity ◽  
Conversion Efficiency ◽  
Sol Gel ◽  
Coprecipitation Method ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Co Conversion

ZrO2 support has been prepared by sol-gel and coprecipitation method. CuO and NiO were supported on the supports and they were the activity metals for the catalysts. The CO conversion was tested. The light-off temperature of CO oxidation was 22°C and CO conversion efficiency was up to 50% at 169°C. The prepared catalysts of Cu, Ni supported on ZrO2-A had a high activity for CO oxidation at low temperature.

scholarly journals Enhancing the Activity and Stability of CuO/OMS-2 Catalyst for CO Oxidation at Low Temperature by Modification with Metal Oxides

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Nhat Huy Nguyen ◽  
Bich Thao Nguyen Thi ◽  
Thao Giang Nguyen Le ◽  
Quynh Anh Nguyen Thi ◽  
Phuoc Toan Phan ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Co Oxidation ◽  
Mixed Oxides ◽  
Specific Rate ◽  
Reduction Temperature ◽  
Low Temperature Oxidation ◽  
Octahedral Structure ◽  
Temperature Oxidation ◽  
Surface Oxides

In this study, mixed oxides of Mn-Cu and Fe-Cu on OMS-2 support having an octahedral structure were synthesized by the refluxing and impregnation methods. The characteristics of the materials were analyzed by XRD, FTIR, SEM, EDX, and H2-TPR. In the CO oxidation test, CuFeOx/OMS-2 had slightly higher catalytic activity but is significantly more stable than CuMnOx/OMS-2 and CuO/OMS-2. Due to its lower reduction temperature in H2-TPR analysis, the Mars-Van-Krevelen mechanism for CuFeOx/OMS-2 (Cu2+–O–Fe3+ ↔ Cu+–□–Fe2+) could take place more energetically than CuO/OMS-2 and CuMnOx/OMS-2 (Cu2+–O2−–Mn4+ ↔ Cu+–□–Mn3+). In addition, the interaction between Fe and Cu in the catalyst could improve the durability of the surface oxides structure in comparison with that between Mn and Cu. With the high specific rate and TOF of 28.6 mmol/h.g and 0.508, respectively, CuFeOx/OMS-2 has a great potential as an effective catalyst for low-temperature oxidation application in CO and possible VOCs removal.

scholarly journals Highly dispersed Pd on macroporous SmMn2O5 mullite for low temperature oxidation of CO and C3H8

RSC Advances ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 5459-5467 ◽  
Author(s):  
Yuning Zhu ◽  
Chun Du ◽  
Zijian Feng ◽  
Yongjie Chen ◽  
Hang Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Oxidation Of Co ◽  
Low Temperature Oxidation ◽  
Oxidation Activity ◽  
Temperature Oxidation ◽  
Pd Dispersion ◽  
Highly Dispersed

Pd-modified SMO mullite catalysts were synthesized and found to have excellent catalytic activity for CO and C3H8 oxidation. The remarkable oxidation activity was attributed to the high Pd dispersion.

scholarly journals Mesoporous Co3O4 supported Pt catalysts for low-temperature oxidation of acetylene

RSC Advances ◽  
2017 ◽  
Vol 7 (30) ◽  
pp. 18592-18600 ◽  
Author(s):  
Qi Wang ◽  
Jian Liu ◽  
Yongheng Li ◽  
Zhen Zhao ◽  
Weiyu Song ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Good Stability ◽  
Pt Catalysts ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Supported Pt Catalysts

0.6Pt/meso-Co3O4 exhibits the highest catalytic activity of acetylene oxidation at 120 °C and good stability for at least 60 h.

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