Hydrothermal synthesis of manganese oxide nanorods as a highly active support for gold nanoparticles in CO oxidation and their stability at low temperature

RSC Advances ◽  
2015 ◽  
Vol 5 (77) ◽  
pp. 62732-62738 ◽  
Author(s):  
Yu-Xin Miao ◽  
Li-Hui Ren ◽  
Lei Shi ◽  
Wen-Cui Li
Keyword(s):  
Gold Nanoparticles ◽  
Hydrothermal Synthesis ◽  
Low Temperature ◽  
Co Oxidation ◽  
Temperature Programmed Desorption ◽  
Deposition Method ◽  
Highly Active ◽  
Colloidal Deposition ◽  
Oxide Nanorods ◽  
Temperature Programmed

One active Au/MnO2 catalysts were prepared by a colloidal deposition method. The deactivation was studied by temperature programmed desorption of CO2 analysis.

Highly active PdCeOx composite catalysts for low-temperature CO oxidation, prepared by plasma-arc synthesis

2014 ◽  
Vol 147 ◽  
pp. 132-143 ◽  
Author(s):  
R.V. Gulyaev ◽  
E.M. Slavinskaya ◽  
S.A. Novopashin ◽  
D.V. Smovzh ◽  
A.V. Zaikovskii ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Plasma Arc ◽  
Composite Catalysts ◽  
Highly Active ◽  
Low Temperature Co Oxidation

scholarly journals CO oxidation over Pt-modified CuO catalysts in the presence of water vapour and SO2

2015 ◽  
Vol 18 (2) ◽  
pp. 187-196
Author(s):  
Tri Nguyen ◽  
Anh Cam Ha ◽  
Loc Cam Luu ◽  
Cuong Tien Hoang ◽  
Thi Thi Yen Trinh ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Water Vapour ◽  
Co Adsorption ◽  
X Ray Diffraction ◽  
Active Centers ◽  
Highly Active ◽  
Transmission Electron ◽  
Physico Chemical ◽  
Adsorption Of Co ◽  
Temperature Programmed

The optimal Pt-modified CuO supported on γ-Al2O3 and γ-Al2O3 + CeO2 catalysts have been prepared. Physico-chemical characteristics of catalysts were investigated and determined by the methods of N2 adsorption (BET), X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), temperature-programmed reduction (TPR), and hydrogen pulse chemisorption (HPC). The characteristics of carbon monoxide (CO) adsorption on catalysts were defined by the method of infrared spectroscopy (IR) in the range of 4000 – 400 cm-1. The effect of the mixture of water vapour and SO2 on the activity of these catalysts for the CO oxidation was assessed. Reactions were conducted at 200oC and 350oC in the absence and presence of the mixture of water vapour (1.1 mol %) and SO2 (0.0625 mol %). Concentrations of O2 and CO in the gas mixture were 9.2 mol % and 0.5 mol %, respectively. The results showed that in the catalysts there exist highly active centers Cu1+ and Pt2+. On the catalysts the adsorption of CO on Cu2+, Pt2+, CeO2, and γ - Al2O3 centres was observed. Addition of CeO2 led to increase the reductivity, CO adsorption but decrease in specific surface area of catalyst. The result PtCu/CeAl catalyst shown higher active, but lower stability compared to PtCu/Al catalyst. The mixture of water vapour and SO2 showed the reversible poisoning toward the Pt-CuO catalysts at a temperature of 350oC, but irreversible at 200oC

Highly Active Heterogeneous 3 nm Gold Nanoparticles on Mesoporous Carbon as Catalysts for Low-Temperature Selective Oxidation and Reduction in Water

ACS Catalysis ◽  
2015 ◽  
Vol 5 (2) ◽  
pp. 797-802 ◽  
Author(s):  
Shuai Wang ◽  
Jie Wang ◽  
Qingfei Zhao ◽  
Dandan Li ◽  
Jian-Qiang Wang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Low Temperature ◽  
Selective Oxidation ◽  
Mesoporous Carbon ◽  
Highly Active

Effect of Gold Nanoparticles on MnOx/TiO2 Nanostructures for Improving the CO Oxidation at Low Temperature

2020 ◽  
Vol 63 (5-6) ◽  
pp. 492-503
Author(s):  
Roberto Camposeco ◽  
Salvador Castillo ◽  
Noel Nava ◽  
Juan Carlos Medina ◽  
Rodolfo Zanella
Keyword(s):  
Gold Nanoparticles ◽  
Low Temperature ◽  
Co Oxidation ◽  
Tio2 Nanostructures

Facile synthesis of a CuMnOx catalyst based on a mechanochemical redox process for efficient and stable CO oxidation

2020 ◽  
Vol 8 (46) ◽  
pp. 24438-24444
Author(s):  
Jiafeng Bao ◽  
Xiaolan Duan ◽  
Pengfei Zhang
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Catalytic Combustion ◽  
Redox Process ◽  
Facile Synthesis ◽  
Highly Active ◽  
Co Removal

Low-temperature catalytic combustion of CO is a desirable route for CO removal. We reported the sythesis of highly active CuMnOx catalyst by a mechanochemical redox process.

Heterostructured BaSO4–SiO2 mesoporous materials as new supports for gold nanoparticles in low-temperature CO oxidation

2013 ◽  
Vol 49 (33) ◽  
pp. 3464 ◽  
Author(s):  
Chengcheng Tian ◽  
Song-Hai Chai ◽  
David R. Mullins ◽  
Xiang Zhu ◽  
Andrew Binder ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Low Temperature ◽  
Co Oxidation ◽  
Mesoporous Materials ◽  
Low Temperature Co Oxidation

Preparation of the Gold Nanoparticles and its Activity for Single-Step Amination of Benzene to Aniline

2013 ◽  
Vol 661 ◽  
pp. 47-52
Author(s):  
Gang Chen ◽  
Chun Hua Yang
Keyword(s):  
Gold Nanoparticles ◽  
Single Step ◽  
Xps Analysis ◽  
Deposition Method ◽  
Reaction Conditions ◽  
Catalyst Amount ◽  
Mild Conditions ◽  
Colloidal Deposition ◽  
Alumina Particles

Gold nanoparticles (AuNPs) were attached to the surface of alumina particles by an in-situ immobilizing method. SEM and XPS analysis showed that the coverage of alumina particles by AuNPs increased as the amount of alumina decreased; AuNPs onto alumina particles by the conventional colloidal deposition method were also prepared, whose TEM showed that the coverage of AuNPs was evidently smaller than that in the case of modified colloidal deposition method，although the AuNPs were spread almost uniformly over the surface of alumina particles. Au-immobilized alumina particles were subsequently utilized as the catalysts for direct amination of benzene with NH3H2O as an aminating agent and H2O2 as an oxidant under mild conditions. The reaction conditions were optimized: when catalyst amount was 2.0 g, reaction temperature was 50 °C, NH3H2O amount was 60 mL, H2O2 amount was 30 mL, and reaction time is 2 h, Au-immobilized alumina particles showed the highest aniline yield (1.96 mg) for 25 mL benzene.

Gold nanoparticles supported on manganese oxides for low-temperature CO oxidation

2009 ◽  
Vol 88 (1-2) ◽  
pp. 204-212 ◽  
Author(s):  
Lu-Cun Wang ◽  
Qian Liu ◽  
Xin-Song Huang ◽  
Yong-Mei Liu ◽  
Yong Cao ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Low Temperature ◽  
Co Oxidation ◽  
Manganese Oxides ◽  
Low Temperature Co Oxidation

Identification of a flattened Pd–Ce oxide cluster as a highly efficient catalyst for low-temperature CO oxidation

2018 ◽  
Vol 8 (20) ◽  
pp. 5137-5147 ◽  
Author(s):  
Yang Xia ◽  
Jingrui Ye ◽  
Dang-guo Cheng ◽  
Fengqiu Chen ◽  
Xiaoli Zhan
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Deposition Method ◽  
Oxide Cluster ◽  
Efficient Catalyst ◽  
Highly Efficient ◽  
Low Temperature Co Oxidation

An improved deposition method was employed to prepare a Pd/CeO2 catalyst, which exhibited highly efficient activity in low-temperature CO oxidation (LTO).

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