Chemistry of Doped Oxides: The Activation of Surface Oxygen and the Chemical Compensation Effect

2011 ◽  
Vol 115 (7) ◽  
pp. 3065-3074 ◽  
Author(s):  
Zhenpeng Hu ◽  
Bo Li ◽  
XiaoYing Sun ◽  
Horia Metiu
Keyword(s):  
Compensation Effect ◽  
Surface Oxygen

Chemisorption of ethylene on nickel surfaces with preadsorbed oxygen

1981 ◽  
Vol 46 (2) ◽  
pp. 340-353
Author(s):  
Pavel Zachař ◽  
Zdeněk Bastl ◽  
Jakub Adámek
Keyword(s):  
Gas Phase ◽  
Phase Analysis ◽  
Oxygen Concentration ◽  
Electrical Resistance ◽  
High Vacuum ◽  
Volumetric Method ◽  
Surface Oxygen ◽  
Oxygen Chemisorption ◽  
Thin Polycrystalline ◽  
Total Adsorption

Chemisorption of ethylene was studied on thin polycrystalline layers of nickel prepared by metal deposition in high vacuum and modified by preadsorbed oxygen. The volumetric method combined with the gas-phase analysis and the measurement of the electrical resistance changes of these layers were used. Already small amounts of preadsorbed oxygen of the order of 10-2 of the monolayer affect rather substantially the extent of ethylene chemisorption. The extent of the initial irreversible chemisorption and also the total adsorption of ethylene as a function of the amount of preadsorbed oxygen have a maximum at the surface oxygen concentration of 3 . 1013 molecule cm-2. The adsorption accompanied by the extensive dissociation of ethylene C-H bonds proceeds predominantly on nickel atoms with lower coordination (atoms on the microcrystal edges, corner atoms, etc.), where also oxygen chemisorption proceeds preferentially.

Bifunctional citrate-Ni0.9Co0.1(OH)x layer coated fluorine-doped hematite for simultaneous hole extraction and injection towards efficient photoelectrochemical water oxidation

Nanoscale ◽  
2021 ◽  
Author(s):  
Peng Wang ◽  
Feng Li ◽  
Xuefeng Long ◽  
Tong Wang ◽  
Huan Chai ◽  
...  
Keyword(s):  
Surface Modification ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Surface Oxygen ◽  
Co Catalyst ◽  
Photoelectrochemical Water Oxidation

Surface modification by loading a water oxidation co-catalyst (WOC) is generally considered to be an efficient means to optimize the sluggish surface oxygen evolution reaction (OER) of hematite photoanode for...

Decoupling the effect of Ni particle size and surface oxygen deficiencies in CO2 methanation over ceria supported Ni

2021 ◽  
Vol 286 ◽  
pp. 119922
Author(s):  
Ziwen Hao ◽  
Jindong Shen ◽  
Shuangxi Lin ◽  
Xiaoyu Han ◽  
Xiao Chang ◽  
...  
Keyword(s):  
Particle Size ◽  
Surface Oxygen ◽  
Co2 Methanation ◽  
Supported Ni
Sign in / Sign up

Export Citation Format

Share Document