CO Oxidation over an Au Catalyst—State of Art

ChemInform ◽  
2006 ◽  
Vol 37 (23) ◽  
Author(s):  
Izabela Dobrosz ◽  
Ireneusz Kocemba ◽  
Jacek M. Rynkowski
Keyword(s):  
Co Oxidation ◽  
Au Catalyst ◽  
State Of Art

Preparation of Au and Au-Ce Catalysts Supported on Acid-Activated Bentontie and its Catalytic Performance

2011 ◽  
Vol 287-290 ◽  
pp. 1704-1707
Author(s):  
Rong Bin Zhang ◽  
Liu Jing Yao ◽  
Yan Ju
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Surface Area ◽  
Pore Volume ◽  
Catalytic Performance ◽  
Substantial Improvement ◽  
Au Catalyst ◽  
Activated Bentonite

Acid-activated by H2SO4was applied to modify bentonite. Acid-activated bentonite supported Au catalyst was prepared by deposition-precipitation and compared with SiO2supported one. CTAB was used to modify the surface of acid-activated bentonite. Au-Ce/bentontie catalyst was prepared by adding Ce into catalyst as assistant. CO oxidation was used to evaluate the catalytic activity of samples. These samples were characterized by BET, XRD, ICP and CO-TPD. The activity results showed that Au/Bentonite was more active than Au/SiO2. The BET results showed that the surface area and pore volume of acid-activated bentontie had a substantial improvement. Using the bentontie acid-activated by 30wt%H2SO4as supporter，the Au-Ce catalyst has a better catalytic performance than Au catalyst.

scholarly journals Activity of Ag/CeZrO2, Ag+K/CeZrO2, and Ag-Au+K/CeZrO2 Systems for Lean Burn Exhaust Clean-Up

Catalysts ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1041
Author(s):  
Ewa M. Iwanek ◽  
Leonarda Francesca Liotta ◽  
Shazam Williams ◽  
Linjie Hu ◽  
Huitian Ju ◽  
...  
Keyword(s):  
Water Vapor ◽  
Co Oxidation ◽  
No Oxidation ◽  
Potassium Ions ◽  
Au Catalyst ◽  
Propane Combustion ◽  
Lean Burn ◽  
Co Conversion ◽  
Negative Effect ◽  
No2 Formation

Herein, the activity of Ag and bimetallic Au-Ag catalysts, supported over Ce0.85Zr0.15O2 (CZ), was investigated in a complex stream, whose components included CO, C3H8, NO, O2, and, optionally, an injection of water vapor. In such a stream, three of the possible reactions that can occur are CO oxidation, propane combustion, and NO oxidation. The aim of these studies was to explore whether silver, due to its strong affinity to oxygen, will counteract the stabilization of oxygen by potassium. The effect of the presence of potassium ions on the activity of the monometallic silver catalysts is beneficial in the complex stream without water vapor in all three studied reactions, although it is negligible in the model CO stream. It has been shown that water vapor strongly suppresses the activity of the Ag+K/CZ catalyst, much more so than that of the Ag/CZ catalyst. The second purpose of the work was to determine whether the negative effect of potassium ions on the activity of nanogold catalyst can be countered by the addition of silver. Studies in a model stream for CO oxidation have shown that, for a catalyst preloaded with gold, the effect of potassium is nulled by silver, and the activity of AuAg + 0.15 at%K/CZ and AuAg + 0.30 at%K/CZ is the same as that of the monometallic Au catalyst. Conversely, when the reaction is carried out in a complex stream, containing CO, C3H8, NO, O2, and water vapor, the presence of water vapor leads to higher CO conversion as well as increased NO2 formation and slightly suppresses the C3H8 combustion.

A way to realize controllable preparation of active nickel oxide supported nano-Au catalyst for CO oxidation

2014 ◽  
Vol 473 ◽  
pp. 7-12 ◽  
Author(s):  
Chengming Zhang ◽  
Xinjiang Cui ◽  
Huimin Yang ◽  
Lirong Zheng ◽  
Youquan Deng ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Co Oxidation ◽  
Au Catalyst ◽  
Controllable Preparation

The effect of oxygen vacancy at CO oxidation on anatase (001)-supported single-Au catalyst

2020 ◽  
Vol 240 ◽  
pp. 122291 ◽  
Author(s):  
Lei Li ◽  
Wenshi Li ◽  
Canyan Zhu ◽  
Ling-Feng Mao
Keyword(s):  
Oxygen Vacancy ◽  
Co Oxidation ◽  
Au Catalyst ◽  
Effect Of Oxygen

Low Temperature CO Oxidation Over a Novel Nano-Structured, Mesoporous CeO2 Supported Au Catalyst

2018 ◽  
Vol 149 (1) ◽  
pp. 127-140 ◽  
Author(s):  
Dolly Valechha ◽  
Suresh Kumar Megarajan ◽  
Ahmed Al-Fatesh ◽  
Heqing Jiang ◽  
Nitin Labhasetwar
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Au Catalyst ◽  
Low Temperature Co Oxidation ◽  
Mesoporous Ceo2
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