XPS and chemisorption studies of the surface layer of Pd−Ag catalysts for CO oxidation

1979 ◽  
Vol 12 (3) ◽  
pp. 339-344 ◽  
Author(s):  
V. K. Yatsimirskii ◽  
N. A. Boldyreva ◽  
T. V. Marchuk
Keyword(s):  
Surface Layer ◽  
Co Oxidation ◽  
Ag Catalysts

Unsupported nanoporous Ag catalysts towards CO oxidation

2014 ◽  
Vol 382 ◽  
pp. 55-63 ◽  
Author(s):  
Tianyi Kou ◽  
Dongwei Li ◽  
Chi Zhang ◽  
Zhonghua Zhang ◽  
Hua Yang
Keyword(s):  
Co Oxidation ◽  
Ag Catalysts

The effect of phosphorous precursor on the CO oxidation activity of P-modified TiO2 supported Ag catalysts

2010 ◽  
Vol 11 (15) ◽  
pp. 1238-1243 ◽  
Author(s):  
Nattaya Comsup ◽  
Joongjai Panpranot ◽  
Piyasan Praserthdam
Keyword(s):  
Co Oxidation ◽  
Oxidation Activity ◽  
Phosphorous Precursor ◽  
Ag Catalysts

Theoretical insight into the single-atom catalytic mechanism of CeO2-supported Ag catalysts in CO oxidation

2019 ◽  
Vol 21 (36) ◽  
pp. 20346-20353 ◽  
Author(s):  
Yongli Shen ◽  
Kangjuan Yin ◽  
Zihui Xiao
Keyword(s):  
Synergistic Effect ◽  
Co Oxidation ◽  
Catalytic Mechanism ◽  
Single Atom ◽  
Theoretical Insight ◽  
Insight Into ◽  
Ag Catalysts

CO oxidation on Ag–CeO2 catalysts was promoted by the synergistic effect of Ag, lattice O and O vacancies, and it follows a single-atom catalytic mechanism.

Catalytic CO oxidation over pumice supported Pd–Ag catalysts

2001 ◽  
Vol 211 (2) ◽  
pp. 167-174 ◽  
Author(s):  
A.M Venezia ◽  
L.F Liotta ◽  
G Deganello ◽  
Z Schay ◽  
D Horváth ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Catalytic Co Oxidation ◽  
Supported Pd ◽  
Ag Catalysts

Nanoporous CeO2-Ag catalysts prepared by etching the CeO2/CuO/Ag2O mixed oxides for CO oxidation

2018 ◽  
Vol 134 ◽  
pp. 140-148 ◽  
Author(s):  
Guijing Li ◽  
Xiaolong Zhang ◽  
Wenjie Feng ◽  
Xueqian Fang ◽  
Jinxi Liu
Keyword(s):  
Co Oxidation ◽  
Mixed Oxides ◽  
Ag Catalysts

The oxidation of Inconel alloy MA754 at low oxidation potential

1983 ◽  
Vol 41 ◽  
pp. 218-219
Author(s):  
D. N. Braski ◽  
P. D. Goodell ◽  
J. V. Cathcart ◽  
R. H. Kane
Keyword(s):  
Surface Layer ◽  
Oxidation Potential ◽  
Metal Interface ◽  
Elevated Temperature Strength ◽  
Surface Conditions ◽  
Inconel Alloy ◽  
Inco Alloy ◽  
Resistance To Oxidation ◽  
Oxide Particles ◽  
Cold Worked

It has been known for some time that the addition of small oxide particles to an 80 Ni—20 Cr alloy not only increases its elevated-temperature strength, but also markedly improves its resistance to oxidation. The mechanism by which the oxide dispersoid enhances the oxidation resistance is being studied collaboratively by ORNL and INCO Alloy Products Company.Initial experiments were performed using INCONEL alloy MA754, which is nominally: 78 Ni, 20 Cr, 0.05 C, 0.3 Al, 0.5 Ti, 1.0 Fe, and 0.6 Y2O3 (wt %).Small disks (3 mm diam × 0.38 mm thick) were cut from MA754 plate stock and prepared with two different surface conditions. The first was prepared by mechanically polishing one side of a disk through 0.5 μm diamond on a syntron polisher while the second used an additional sulfuric acid-methanol electropolishing treatment to remove the cold-worked surface layer. Disks having both surface treatments were oxidized in a radiantly heated furnace for 30 s at 1000°C. Three different environments were investigated: hydrogen with nominal dew points of 0°C, —25°C, and —55°C. The oxide particles and films were examined in TEM by using extraction replicas (carbon) and by backpolishing to the oxide/metal interface. The particles were analyzed by EDS and SAD.

Structural analysis of the surface-layer protein of spirillum serpens by high-resolution electron microscopy

1983 ◽  
Vol 41 ◽  
pp. 738-739
Author(s):  
W. H. Wu ◽  
R. M. Glaeser
Keyword(s):  
Electron Microscopy ◽  
Surface Layer ◽  
Structural Analysis ◽  
High Resolution ◽  
Low Dose ◽  
High Resolution Electron Microscopy ◽  
Optical Diffraction ◽  
Surface Layer Protein ◽  
Morphological Unit ◽  
Resolution Electron

Spirillum serpens possesses a surface layer protein which exhibits a regular hexagonal packing of the morphological subunits. A morphological model of the structure of the protein has been proposed at a resolution of about 25 Å, in which the morphological unit might be described as having the appearance of a flared-out, hollow cylinder with six ÅspokesÅ at the flared end. In order to understand the detailed association of the macromolecules, it is necessary to do a high resolution structural analysis. Large, single layered arrays of the surface layer protein have been obtained for this purpose by means of extensive heating in high CaCl2, a procedure derived from that of Buckmire and Murray. Low dose, low temperature electron microscopy has been applied to the large arrays.As a first step, the samples were negatively stained with neutralized phosphotungstic acid, and the specimens were imaged at 40,000 magnification by use of a high resolution cold stage on a JE0L 100B. Low dose images were recorded with exposures of 7-9 electrons/Å2. The micrographs obtained (Fig. 1) were examined by use of optical diffraction (Fig. 2) to tell what areas were especially well ordered.

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