The role of zirconia in cobaltosic oxide catalysts for low-temperature CO oxidation

RSC Advances ◽  
2016 ◽  
Vol 6 (112) ◽  
pp. 111070-111078 ◽  
Author(s):  
Fan Du ◽  
Guisheng Wu ◽  
Dongsen Mao ◽  
Guanzhong Lu
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Co Adsorption ◽  
Oxide Catalysts ◽  
Low Temperature Co Oxidation ◽  
Cobaltosic Oxide ◽  
Adsorption Desorption

A series of Co3O4/ZrO2 catalysts for low-temperature CO oxidation was prepared, and then characterized by low-temperature N2 adsorption/desorption, XRD, TEM, XPS, UV-vis, CO-TPR, CO adsorption and CO2 desorption.

Promotional role of ceria on cobaltosic oxide catalyst for low-temperature CO oxidation

2012 ◽  
Vol 2 (9) ◽  
pp. 1865 ◽  
Author(s):  
Jie Li ◽  
Guanzhong Lu ◽  
Guisheng Wu ◽  
Dongsen Mao ◽  
Yanqin Wang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Oxide Catalyst ◽  
Low Temperature Co Oxidation ◽  
Cobaltosic Oxide

scholarly journals The Origin of Au/Ce1-xZrxO2 Catalyst’s Active Sites in Low-Temperature CO Oxidation

Catalysts ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1312
Author(s):  
Izabela Dobrosz-Gómez ◽  
Miguel-Ángel Gómez-García ◽  
Jacek Michał Rynkowski
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Active Sites ◽  
Surface Composition ◽  
Co Adsorption ◽  
Gold Catalysis ◽  
Support Surface ◽  
Oxide Support ◽  
Low Temperature Co Oxidation

Gold catalysts have found applications in many reactions of both industrial and environmental importance. Great interest has been paid to the development of new processes that reduce energy consumption and minimize pollution. Among these reactions, the catalytic oxidation of carbon monoxide (CO) is an important one, considering that a high concentration of CO in the atmosphere creates serious health and environmental problems. This paper examines the most important achievements and conclusions arising from the own authorship contributions concerning (2 wt. % Au)/Ce1−xZrxO2 catalyst’s active sites in low-temperature CO oxidation. The main findings of the present review are: (1) The effect of preparing conditions on Au crystallite size, highlighting some of the fundamental underpinnings of gold catalysis: the Au surface composition and the poisoning effect of residual chloride on the catalytic activity of (2 wt. % Au)/Ce1−xZrxO2 catalysts in CO oxidation; (2) The identification of ion clusters related to gold and their effect on catalyst’ surface composition; (3) The importance of physicochemical properties of oxide support (e.g., its particle size, oxygen mobility at low temperature and redox properties) in the creation of catalytic performance of Au catalysts; (4) The importance of oxygen vacancies, on the support surface, as the centers for oxygen molecule activation in CO reaction; (5) The role of moisture (200–1000 ppm) in the generation of enhanced CO conversion; (6) The Au-assisted Mars-van Krevelen (MvK) adsorption–reaction model was pertinent to describe CO oxidation mechanism. The principal role of Au in CO oxidation over (2 wt. % Au)/Ce1−xZrxO2 catalysts was related to the promotion in the transformation process of reversibly adsorbed or inactive surface oxygen into irreversibly adsorbed active species; (7) Combination of metallic gold (Au0) and Au-OH species was proposed as active sites for CO adsorption. These findings can help in the optimization of Au-containing catalysts.

Microstructural comparison of calcined and uncalcined gold/iron-oxide catalysts for low-temperature CO oxidation

2002 ◽  
Vol 72 (1-2) ◽  
pp. 133-144 ◽  
Author(s):  
N.A Hodge ◽  
C.J Kiely ◽  
R Whyman ◽  
M.R.H Siddiqui ◽  
G.J Hutchings ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Low Temperature ◽  
Co Oxidation ◽  
Oxide Catalysts ◽  
Low Temperature Co Oxidation

Low-temperature CO oxidation over supported Pt, Pd catalysts: Particular role of FeOx support for oxygen supply during reactions

2010 ◽  
Vol 274 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Lequan Liu ◽  
Feng Zhou ◽  
Liguo Wang ◽  
Xiujuan Qi ◽  
Feng Shi ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Oxygen Supply ◽  
Pd Catalysts ◽  
Low Temperature Co Oxidation

The role of iron oxide in the highly effective Fe-modified Co3O4 catalyst for low-temperature CO oxidation

RSC Advances ◽  
2013 ◽  
Vol 3 (30) ◽  
pp. 12409 ◽  
Author(s):  
Jie Li ◽  
Guanzhong Lu ◽  
Guisheng Wu ◽  
Dongsen Mao ◽  
Yanglong Guo ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Low Temperature ◽  
Co Oxidation ◽  
Highly Effective ◽  
Low Temperature Co Oxidation
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