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.

scholarly journals CO Oxidation over Metal Oxide (La2O3, Fe2O3, PrO2, Sm2O3, and MnO2) Doped CuO-Based Catalysts Supported on Mesoporous Ce0.8Zr0.2O2 with Intensified Low-Temperature Activity

Catalysts ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 724 ◽  
Author(s):  
Yan Cui ◽  
Leilei Xu ◽  
Mindong Chen ◽  
Chufei Lv ◽  
Xinbo Lian ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Metal Oxide ◽  
Metal Oxides ◽  
Co Oxidation ◽  
Active Sites ◽  
Earth Metal ◽  
High Dispersion ◽  
Impregnation Method ◽  
X Ray

CuO-based catalysts are usually used for CO oxidation owing to their low cost and excellent catalytic activities. In this study, a series of metal oxide (La2O3, Fe2O3, PrO2, Sm2O3, and MnO2)-doped CuO-based catalysts with mesoporous Ce0.8Zr0.2O2 support were simply prepared by the incipient impregnation method and used directly as catalysts for CO catalytic oxidation. These mesoporous catalysts were systematically characterized by X-ray powder diffraction (XRD), N2 physisorption, transmission electron microscopy (TEM), energy-dispersed spectroscopy (EDS) mapping, X-ray photoelectron spectroscopy (XPS), and H2 temperature programmed reduction (H2-TPR). It was found that the CuO and the dopants were highly dispersed among the mesoporous framework via the incipient impregnation method, and the strong metal framework interaction had been formed. The effects of the types of the dopants and the loading amounts of the dopants on the low-temperature catalytic performances were carefully studied. It was concluded that doped transition metal oxides could regulate the oxygen mobility and reduction ability of catalysts, further improving the catalytic activity. It was also found that the high dispersion of rare earth metal oxides (PrO2, Sm2O3) was able to prevent the thermal sintering and aggregation of CuO-based catalysts during the process of calcination. In addition, their presence also evidently improved the reducibility and significantly reduced the particle size of the CuO active sites for CO oxidation. The results demonstrated that the 15CuO-3Fe2O3/M-Ce80Zr20 catalyst with 3 wt. % of Fe2O3 showed the best low-temperature catalytic activity toward CO oxidation. Overall, the present Fe2O3-doped CuO-based catalysts with mesoporous nanocrystalline Ce0.8Zr0.2O2 solid solution as support were considered a promising series of catalysts for low-temperature CO oxidation.

Pt NPs immobilized on a N-doped graphene@Al2O3 hybrid support as robust catalysts for low temperature CO oxidation

2018 ◽  
Vol 54 (79) ◽  
pp. 11168-11171 ◽  
Author(s):  
Zhimin Jia ◽  
Fei Huang ◽  
Jiangyong Diao ◽  
Jiayun Zhang ◽  
Jia Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Co Oxidation ◽  
Platinum Nanoparticles ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Low Temperature Co Oxidation ◽  
Doped Graphene ◽  
Strong Metal Support Interaction

Platinum nanoparticles (Pt NPs) immobilized on a N-doped graphene@Al2O3 hybrid support (Al2O3@CNx) were synthesized and exhibit superior catalytic activity for low temperature CO oxidation, due to a strong metal–support interaction between Pt NPs and the N-doped.

scholarly journals The Role of Organic Capping Layers of Platinum Nanoparticles in Catalytic Activity of CO Oxidation

2009 ◽  
Vol 129 (1-2) ◽  
pp. 1-6 ◽  
Author(s):  
Jeong Y. Park ◽  
Cesar Aliaga ◽  
J. Russell Renzas ◽  
Hyunjoo Lee ◽  
Gabor A. Somorjai
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Platinum Nanoparticles ◽  
Organic Capping

Hydrogen Spillover Enhanced Hydroxyl Formation and Catalytic Activity Toward CO Oxidation at the Metal/Oxide Interface

2015 ◽  
Vol 21 (11) ◽  
pp. 4252-4256 ◽  
Author(s):  
Yuekang Jin ◽  
Guanghui Sun ◽  
Feng Xiong ◽  
Liangbing Ding ◽  
Weixin Huang
Keyword(s):  
Catalytic Activity ◽  
Metal Oxide ◽  
Co Oxidation ◽  
Hydrogen Spillover ◽  
Oxide Interface ◽  
Hydroxyl Formation

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...

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.

Tuning the CO oxidation catalytic activity of supported metal–metal oxide heterostructures by an aqueous phase post-treatment process

2016 ◽  
Vol 4 (46) ◽  
pp. 18075-18083 ◽  
Author(s):  
Chunzheng Wu ◽  
Rosaria Brescia ◽  
Mirko Prato ◽  
Sergio Marras ◽  
Liberato Manna ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
High Temperature ◽  
Metal Oxide ◽  
Co Oxidation ◽  
Treatment Process ◽  
Oxide Interface ◽  
Oxide Heterostructures ◽  
Metal Metal ◽  
Ligand Free ◽  
Post Treatment Process

Colloidal Au–MnO heterodimers were deposited on SiO2 and calcined at high temperature in air in order to prepare a ligand-free Au–Mn3O4/SiO2 model catalyst for CO oxidation with a well-defined Au size and Au–metal oxide interface.

Enhanced catalytic activity for CO oxidation by the metal–oxide perimeter of TiO2/nanostructured Au inverse catalysts

Nanoscale ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 3911-3917 ◽  
Author(s):  
Si Woo Lee ◽  
Jun Tae Song ◽  
Jaehoon Kim ◽  
Jihun Oh ◽  
Jeong Young Park
Keyword(s):  
Catalytic Activity ◽  
Metal Oxide ◽  
Co Oxidation

We fabricated and used TiO2/nanoporous Au catalysts to determine the effect of the metal–oxide perimeter on catalytic activity.

COBALT OXIDE DECORATED FLOWER-LIKE g-C3N4 HYBRID NANOMATERIALS FOR CARBON MONOXIDE OXIDATION

2016 ◽  
Vol 24 (05) ◽  
pp. 1750058 ◽  
Author(s):  
YAN WANG ◽  
JING HUANG ◽  
JIANLIANG CAO ◽  
GAOJIE LI ◽  
ZHANYING ZHANG
Keyword(s):  
Carbon Monoxide ◽  
Catalytic Activity ◽  
Co Oxidation ◽  
Hydrothermal Method ◽  
Cobalt Oxide ◽  
Reaction Temperature ◽  
High Catalytic Activity ◽  
Total Conversion ◽  
Ft Ir ◽  
Excellent Stability

Co3O4 decorated flower-like g-C3N4 hybrid nanocatalysts were successfully synthesized and prepared via a facial hydrothermal method. The composition and morphology of the as-synthesized Co3O4/g-C3N4 nanocatalysts were characterized by the techniques of XRD, FT-IR, SEM, TEM, XPS and N2-sorption. The analysis results indicated that the as-synthesized samples possess the flower-like structure, which consisted of g-C3N4 nanosheets and Co3O4 nanoparticles with the size about 25[Formula: see text]nm. The as-prepared Co3O4/g-C3N4 catalysts possess high catalytic activity and excellent stability for carbon monoxide (CO) oxidation. The total conversion of Co can be kept for more than 48[Formula: see text]h under the reaction temperature of 120[Formula: see text]C.

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