Ultralow-temperature CO oxidation on an In2O3–Co3O4 catalyst: a strategy to tune CO adsorption strength and oxygen activation simultaneously

2014 ◽  
Vol 50 (52) ◽  
pp. 6835-6838 ◽  
Author(s):  
Yang Lou ◽  
Xiao-Ming Cao ◽  
Jinggang Lan ◽  
Li Wang ◽  
Qiguang Dai ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Co Adsorption ◽  
Oxygen Activation ◽  
Highly Efficient ◽  
Ultralow Temperature

Highly efficient In2O3–Co3O4 catalysts were prepared for ultralow-temperature CO oxidation by simultaneously tuning the CO adsorption strength and oxygen activation over a Co3O4 surface.

scholarly journals Unique structure of active platinum-bismuth site for oxidation of carbon monoxide

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Bing Nan ◽  
Qiang Fu ◽  
Jing Yu ◽  
Miao Shu ◽  
Lu-Lu Zhou ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Low Temperature ◽  
Co Oxidation ◽  
Density Functional ◽  
Technology Development ◽  
Co Adsorption ◽  
Combustion Engines ◽  
Advanced Combustion ◽  
Surface Metal ◽  
Bismuth Cluster

AbstractAs the technology development, the future advanced combustion engines must be designed to perform at a low temperature. Thus, it is a great challenge to synthesize high active and stable catalysts to resolve exhaust below 100 °C. Here, we report that bismuth as a dopant is added to form platinum-bismuth cluster on silica for CO oxidation. The highly reducible oxygen species provided by surface metal-oxide (M-O) interface could be activated by CO at low temperature (~50 °C) with a high CO2 production rate of 487 μmolCO2·gPt−1·s−1 at 110 °C. Experiment data combined with density functional calculation (DFT) results demonstrate that Pt cluster with surface Pt−O−Bi structure is the active site for CO oxidation via providing moderate CO adsorption and activating CO molecules with electron transformation between platinum atom and carbon monoxide. These findings provide a unique and general approach towards design of potential excellent performance catalysts for redox reaction.

Controlled Construction of Cu(I) Sites within Confined Spaces via Host–Guest Redox: Highly Efficient Adsorbents for Selective CO Adsorption

2018 ◽  
Vol 10 (46) ◽  
pp. 40044-40053 ◽  
Author(s):  
Yu-Xia Li ◽  
Yu-Nong Ji ◽  
Meng-Meng Jin ◽  
Shi-Chao Qi ◽  
Shuai-Shuai Li ◽  
...  
Keyword(s):  
Co Adsorption ◽  
Confined Spaces ◽  
Highly Efficient

Atomically dispersed Au catalysts supported on CeO2 foam: controllable synthesis and CO oxidation reaction mechanism

Nanoscale ◽  
2017 ◽  
Vol 9 (43) ◽  
pp. 16817-16825 ◽  
Author(s):  
Hao Wang ◽  
Jianhua Shen ◽  
Jianfei Huang ◽  
Tengjing Xu ◽  
Jingrun Zhu ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Co Oxidation ◽  
Oxidation Reaction ◽  
Co Adsorption ◽  
Controllable Synthesis ◽  
Co Oxidation Reaction

The Au atoms on CeO2 foam are a more stable site for CO adsorption on the catalysts.

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

Synthesis of highly efficient α-Fe 2 O 3 catalysts for CO oxidation derived from MIL-100(Fe)

2017 ◽  
Vol 247 ◽  
pp. 168-172 ◽  
Author(s):  
Lifeng Cui ◽  
Di Zhao ◽  
Yang Yang ◽  
Yuxin Wang ◽  
Xiaodong Zhang
Keyword(s):  
Co Oxidation ◽  
Highly Efficient

Isotope labelling study of CO oxidation-assisted epoxidation of propene. Implications for oxygen activation on Au catalysts

2010 ◽  
Vol 46 (21) ◽  
pp. 3791 ◽  
Author(s):  
Jian Jiang ◽  
Sean M. Oxford ◽  
Baosong Fu ◽  
Mayfair C. Kung ◽  
Harold H. Kung ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Oxygen Activation ◽  
Isotope Labelling
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