Ni/CexZr1-xO2 catalyst prepared via one-step co-precipitation for CO2 reforming of CH4 to produce syngas: role of oxygen storage capacity (OSC) and oxygen vacancy formation energy (OVFE)

2022 ◽  
Author(s):  
Manohar Prasad ◽  
Koustuv Ray ◽  
Apurba Sinhamahapatra ◽  
Siddhartha Sengupta
Keyword(s):  
Formation Energy ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Co2 Reforming ◽  
Co2 Reforming Of Ch4 ◽  
Oxygen Vacancy Formation ◽  
One Step ◽  
Co Precipitation

Oxygen Storage Capacity of CexZr1-xO2 (0.4≤x≤0.8) Solid Solution Using Thermogravimetric Analysis

2013 ◽  
Vol 747 ◽  
pp. 579-582 ◽  
Author(s):  
N. Shanmuga Priya ◽  
Chandramohan Somayaji ◽  
S. Kanagaraj
Keyword(s):  
Solid Solution ◽  
Storage Capacity ◽  
Mixed Oxides ◽  
High Surface ◽  
High Surface Area ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Co Precipitation ◽  
Good Number ◽  
High Oxygen Storage Capacity

The property of high oxygen storage capacity (OSC) of Ceria is an important component in three-way catalysts (TWC), which depends on the low reduction temperature, high surface area and stable crystalline structure. These are required to be improved using mixed oxides for the increased OSC of TWC. Though a good number of literature is available in Ceria-Zirconia mixed oxides, optimization of the composition of oxides based on OSC is very much limited. Hence, an attempt was made to optimize the composition of CexZr1-xO2 (0.4 x 0.8) (CZ) based on the OSC using thermogravimetric technique. The CZ solid solution was prepared by co-precipitation (COP) method using Ceria nitrate, and Zirconia oxy-choloride precursors, where the freshly prepared metal hydroxide precipitates were continuously stirred at 45 °C for 60 minutes followed by washing and drying to obtain the nanosized CZ particles. The formation of single nanocrystallite with less than 8 nm size solid solution was identified by XRD, and the same was confirmed by Micro Raman studies. It is observed that the trend of OSC in CZ solid solution was based on the ratio of Ce to Zr in the starting aqueous solution, where the OSC was found to be maximum at 1.5 and the corresponding OSC of the compound was about 0.14 μmol per gram of Ceria.

A Study on Oxygen Storage Capacity of Zirconium-Cerium-Oxide Nanoparticles

2013 ◽  
Vol 685 ◽  
pp. 123-127 ◽  
Author(s):  
Ajin C. Sajeevan ◽  
V. Sajith
Keyword(s):  
Cerium Oxide ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Precipitation Method ◽  
Xrd Pattern ◽  
Harmful Emissions ◽  
Uv Visible ◽  
Co Precipitation

One of the methods for the reduction of harmful emissions from diesel engines such as hydrocarbon, soot and NOx is the use of fuel born catalyst Cerium oxide. The oxygen storage capacity of Cerium oxide can be improved by coating it with metal such as Zirconium. Zr – Ce-O nanoparticles were synthesized by Co-precipitation method in the present work. Dynamic Light scattering, XRD pattern and UV-Visible spectroscopy were used for characterization of the prepared samples. Thermo gravimetric studies were conducted to investigate the thermal decomposition of Zr-Ce-O nanoparticles. The oxygen storage capacity of Zr-Ce-O nanoparticles was analyzed using TPR analysis.

Role of Lattice Distortions in the Oxygen Storage Capacity of Divalently Doped CeO2

2011 ◽  
Vol 23 (20) ◽  
pp. 4464-4468 ◽  
Author(s):  
Aoife B. Kehoe ◽  
David O. Scanlon ◽  
Graeme W. Watson
Keyword(s):  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Lattice Distortions ◽  
Doped Ceo2

Synthesis and Characterization of Ce0.5Zr0.5O2 Nanocomposite and its Supported Pd-Only Catalysis Activity

2014 ◽  
Vol 633 ◽  
pp. 77-81
Author(s):  
Dong Xia Yang ◽  
Ping Ning ◽  
Jie Li He ◽  
Jing Fang Zhu ◽  
Ting Ting Zheng ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
X Ray Diffraction ◽  
Fractional Precipitation ◽  
Temperature Programmed ◽  
Co Precipitation ◽  
Redox Ability

The Ce0.5Zr0.5O2 nanocomposites (CZ) were prepared by co-precipitation(CP), fractional precipitation (FP) and fractional precipitation with hydrothermal treatment (FP-HT). The samples were characterized by X-ray diffraction (XRD), Brunauer-Emmet Teller method (BET), H2-temperature programmed reduction (H2-TPR), and thermogravimetric analysis (TG) under H2-N2. XRD results displayed that all samples formed a single solid solution-like ceria-zirconia phase. BET results revealed CZ prepared by FP-HT (CZ-FP-HT) had the highest surface area. H2-TPR and TG analysis under H2-N2 showed CZ-FP-HT exhibited the strongest redox ability and oxygen storage capacity. Moreover, three-way catalysts of Pd-Rh supported on CZ -FP-HT and commercial CZ with same composites were prepared, and their three-way catalytic activity were also studied by engine evaluation. Pd-Rh/CZ-FP-HT showed a bit of higher oxygen storage capacity, catalytic activity and better thermal stability than Pd-Rh/CZ-commercial.

Role of Ceria-Zirconia Solid Solution with High Oxygen Storage Capacity in Cermet Anodes of Solid Oxide Fuel Cells

2014 ◽  
Vol 161 (9) ◽  
pp. F883-F888 ◽  
Author(s):  
Sung-Il Lee ◽  
Moon-Bong Choi ◽  
Hari Prasad Dasari ◽  
Jongsup Hong ◽  
Hyoungchul Kim ◽  
...  
Keyword(s):  
Solid Solution ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Solid Oxide ◽  
Oxygen Storage ◽  
Oxide Fuel ◽  
High Oxygen Storage Capacity

scholarly journals Effect of support oxygen storage capacity on the catalytic performance of Rh nanoparticles for CO2 reforming of methane

2019 ◽  
Vol 243 ◽  
pp. 490-501 ◽  
Author(s):  
Ioannis V. Yentekakis ◽  
Grammatiki Goula ◽  
Maria Hatzisymeon ◽  
Ioanna Betsi-Argyropoulou ◽  
Georgia Botzolaki ◽  
...  
Keyword(s):  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Catalytic Performance ◽  
Oxygen Storage ◽  
Co2 Reforming ◽  
Co2 Reforming Of Methane ◽  
Effect Of Support

Enhancing the oxygen vacancy formation and migration in bulk chromium(iii) oxide by alkali metal doping: a change from isotropic to anisotropic oxygen diffusion

2017 ◽  
Vol 5 (30) ◽  
pp. 15613-15630 ◽  
Author(s):  
John J. Carey ◽  
M. Nolan
Keyword(s):  
Oxygen Vacancy ◽  
Solid Oxide Fuel Cells ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Vacancy Formation ◽  
Oxygen Vacancy Formation ◽  
Wide Range ◽  
Reducible Oxides ◽  
And Migration

Oxygen vacancy formation and migration are vital properties for reducible oxides such as TiO2, CeO2 and Cr2O3 as the oxygen storage capacity (OSC) of these materials are important for a wide range of applications in photovoltaics, oxidative catalysis and solid oxide fuel cells.

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