Cu Oxide Deposited on Shape-Controlled Ceria Nanocrystals for CO Oxidation: Influence of Interface-Driven Oxidation States on Catalytic Activity

2021 ◽  
Author(s):  
Kasala Prabhakar Reddy ◽  
Han Seul Choi ◽  
Daeho Kim ◽  
Ryong Ryoo ◽  
Jeong Y. Park
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalysis ◽  
Co Oxidation ◽  
Oxidation State ◽  
Oxidation States ◽  
Highly Active ◽  
Shape Controlled ◽  
The Relationship

The design of a catalyst with a highly active and stable oxidation state is of great interest in heterogeneous catalysis. Herein, the relationship between catalytic activity and oxidation state on...

Highly active water oxidation on nanostructured biomimetic calcium manganese oxide catalysts

2016 ◽  
Vol 4 (17) ◽  
pp. 6585-6594 ◽  
Author(s):  
Feng Rong ◽  
Jiao Zhao ◽  
Zheng Chen ◽  
Yuxing Xu ◽  
Yaopeng Zhao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Manganese Oxide ◽  
Oxidation State ◽  
Water Oxidation ◽  
Oxide Catalysts ◽  
Structural Distortion ◽  
Manganese Oxide Catalysts ◽  
Highly Active

Nanostructured biomimetic birnessite CaxMnOy oxides with an intermediate Mn oxidation state and proper structural distortion show improved catalytic activity for the WOR.

Nanogold supported on manganese oxide doped alumina microspheres as a highly active and selective catalyst for CO oxidation in a H2-rich stream

2015 ◽  
Vol 51 (100) ◽  
pp. 17728-17731 ◽  
Author(s):  
Yu-Xin Miao ◽  
Wen-Cui Li ◽  
Qiang Sun ◽  
Lei Shi ◽  
Lei He ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Manganese Oxide ◽  
High Catalytic Activity ◽  
Selective Catalyst ◽  
Support Interaction ◽  
Highly Active

The exceptionally high catalytic activity for CO-PROX reaction is due to the Au–support interaction and the unique reducibility of the support.

Highly active and stable Au@CuxO core–shell nanoparticles supported on alumina for carbon monoxide oxidation at low temperature

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75126-75132 ◽  
Author(s):  
Weining Zhang ◽  
Qingguo Zhao ◽  
Xiaohong Wang ◽  
Xiaoxia Yan ◽  
Sheng Han ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Catalytic Activity ◽  
Low Temperature ◽  
Co Oxidation ◽  
Room Temperature ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Highly Active ◽  
Co Conversion ◽  
Core Shell Nanoparticles

Au@CuxO core–shell nanoparticles and Au@CuxO/Al2O3 used for CO oxidation at low temperature are prepared. CO conversion on Au@CuxO/Al2O3 can reach to 38% at room temperature and the catalytic activity remains unchanged after 108 hours reaction.

The effect of the oxidation states of supported oxides on catalytic activity: CO oxidation studies on Pt/cobalt oxide

2019 ◽  
Vol 55 (64) ◽  
pp. 9503-9506 ◽  
Author(s):  
Hee Chan Song ◽  
Seungtaeg Oh ◽  
Sang Hoon Kim ◽  
Si Woo Lee ◽  
Song Yi Moon ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Oxide ◽  
Co Oxidation ◽  
Cobalt Oxide ◽  
Platinum Nanoparticles ◽  
Oxidation States ◽  
Cobalt Oxides ◽  
Supported Oxides

The strong metal–oxide interaction of platinum nanoparticles (PtNPs) deposited on two types of cobalt oxides, CoO and Co3O4, was investigated using CO oxidation.

Effect of size and oxidation state of platinum nanoparticles on the electrocatalytic performance of graphene-nanoparticle composites

RSC Advances ◽  
2015 ◽  
Vol 5 (104) ◽  
pp. 85196-85201 ◽  
Author(s):  
Avijit Mondal ◽  
Nikhil R. Jana
Keyword(s):  
Catalytic Activity ◽  
Oxidation State ◽  
Methanol Oxidation ◽  
Platinum Nanoparticles ◽  
Pt Nanoparticles ◽  
Oxidation States ◽  
Graphene Nanocomposites ◽  
Electrocatalytic Performance ◽  
Nanoparticle Composites

Size and oxidation state of Pt nanoparticles significantly influence the electrocatalytic performance of Pt–graphene nanocomposites for methanol oxidation and 2.2 nm Pt with variable oxidation states offers the best catalytic activity and durability.

The average Pd oxidation state in Pd/SiO2 quantified by L3-edge XANES analysis and its effects on catalytic activity for CO oxidation

2012 ◽  
Vol 2 (4) ◽  
pp. 767 ◽  
Author(s):  
Ken-ichi Shimizu ◽  
Yuichi Kamiya ◽  
Kaoru Osaki ◽  
Hisao Yoshida ◽  
Atsushi Satsuma
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Oxidation State ◽  
Xanes Analysis

Effect of Templates on Catalytic Activity of Ordered Mesoporous Ceria for CO Oxidation

2014 ◽  
Vol 1033-1034 ◽  
pp. 95-98
Author(s):  
Peng Yang ◽  
Shi Yu Zhou ◽  
Jia Heng Lei
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Mesoporous Carbon ◽  
Catalytic Properties ◽  
X Ray ◽  
Catalytic Activities ◽  
Ordered Mesoporous ◽  
Ceria Catalysts ◽  
Fluorescence Spectrometer ◽  
The Relationship

Mesoporous ceria catalysts were prepared by nanocasting of a mesoporous carbon and KIT-6. The prepared mesoporous ceria catalysts were used to catalyze CO oxidation. The various characterization techniques were employed to study the relationship between catalyst nature and catalytic properties. The results indicate that ceria prepared by using mesoporous carbon as template possess an ordered mesoporous architecture and exhibit much better catalytic activity compared with those prepared by using KIT-6 as template. The residual SiO2from KIT-6 was demonstrated to be the main reason for the much worse catalytic activities by the characterization results of X-ray Fluorescence Spectrometer and FTIR spectra.

Deactivation of arenetitanium(II) bromoalane complexes in the cyclotrimerization of butadiene

1986 ◽  
Vol 51 (12) ◽  
pp. 2751-2759 ◽  
Author(s):  
Jindřich Poláček ◽  
Helena Antropiusová ◽  
Lidmila Petrusová ◽  
Karel Mach
Keyword(s):  
Catalytic Activity ◽  
Catalytic System ◽  
Model System ◽  
Highly Active ◽  
Catalytic Stability

The C6H6.Ti(II)(AlBr4)2 (Ib) catalyst deactivates during the butadiene cyclotrimerization to give a solid containing all titanium (mostly as TiBr3) and a mixture of AlBr3 and RAlBr2 compounds dissolved in benzene. The residual cationic catalytic activity of the deactivated Ib system is due to presence of AlBr3. In contrast to TiCl3, the deactivated Ib system and the model system TiBr3 + AlBr3 are not activated by the addition of EtAlCl2 in the presence of butadiene: the highly active benzenetitanium(II) system is re-constituted only after reduction of TiBr3 with Et3Al followed by the addition of EtAlCl2. The addition of Et2AlBr to Ib accelerates the deactivation of the system. Deactivation products of this system contain mainly Ti(II) species which forms benzenetitanium(II) catalytic system after addition of EtAlCl2. All the EtAlCl2 reactivated systems produce (Z, E, E)-1,5,9-cyclododecatriene with high catalytic stability and considerable selectivity (>90%). This behaviour points to the catalysis by benzenetitanium(II) chloroalane complexes containing only low amount of bromine atoms and ethyl groups.

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