scholarly journals CO2 Methanation on Supported Rh Nanoparticles: The combined Effect of Support Oxygen Storage Capacity and Rh Particle Size

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 944 ◽  
Author(s):  
Georgia Botzolaki ◽  
Grammatiki Goula ◽  
Anatoli Rontogianni ◽  
Ersi Nikolaraki ◽  
Nikolaos Chalmpes ◽  
...  
Keyword(s):  
Particle Size ◽  
Rational Design ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Catalyst Design ◽  
Oxygen Storage ◽  
Design Parameters ◽  
Co2 Methanation ◽  
Design And Optimization ◽  
Effect Of Support

CO2 hydrogenation toward methane, a reaction of high environmental and sustainable energy importance, was investigated at 200–600 °C and H2/CO2 = 4/1, over Rh nanoparticles dispersed on supports with different oxygen storage capacity characteristics (γ-Al2O3, alumina-ceria-zirconia, and ceria-zirconia). The effects of the support OSC and Rh particle size on reaction behavior under both integral and differential conditions were investigated, to elucidate the combined role of these crucial catalyst design parameters on methanation efficiency. A volcano-type variation of methanation turnover frequency was found in respect to support OSC; Rh/ACZ, with intermediate OSC, was the optimal catalyst. The structure sensitivity of the reaction was found to be a combined function of support OSC and Rh particle size: For Rh/γ-Al2O3 (lack of OSC) methanation was strongly favored on small particles—the opposite for Rh/CZ (high OSC). The findings are promising for rational design and optimization of CO2 methanation catalysts by tailoring the aforementioned characteristics.

The interplay between ceria particle size, reducibility, and ethanol oxidation activity of ceria-supported gold catalysts

2018 ◽  
Vol 3 (1) ◽  
pp. 75-85 ◽  
Author(s):  
Gregory M. Mullen ◽  
Edward J. Evans ◽  
Benjamin C. Siegert ◽  
Nathan R. Miller ◽  
Benjamin K. Rosselet ◽  
...  
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Ethanol Oxidation ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Oxidation Activity ◽  
Supported Gold Catalysts ◽  
Supported Gold ◽  
Ceria Particle

The size of ceria particles influenced the activity of Au/CeO2 catalysts for ethanol oxidation, demonstrating a linear correlation between oxygen storage capacity and catalytic activity.

Rational Synthesis Concept for Cerium Oxide Nanoparticles: On the Impact of Particle Size on the Oxygen Storage Capacity

2020 ◽  
Vol 124 (16) ◽  
pp. 8736-8748 ◽  
Author(s):  
Elifkübra Özkan ◽  
Pascal Cop ◽  
Felix Benfer ◽  
Alexander Hofmann ◽  
Martin Votsmeier ◽  
...  
Keyword(s):  
Particle Size ◽  
Cerium Oxide ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
The Impact

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

Rational design of nanostructured, noble metal free, ceria–zirconia catalysts with outstanding low temperature oxygen storage capacity

2013 ◽  
Vol 1 (15) ◽  
pp. 4836 ◽  
Author(s):  
M. Pilar Yeste ◽  
Juan C. Hernández-Garrido ◽  
D. Carolina Arias ◽  
Ginesa Blanco ◽  
José M. Rodríguez-Izquierdo ◽  
...  
Keyword(s):  
Low Temperature ◽  
Noble Metal ◽  
Rational Design ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Metal Free

Nanocrystalline Mixed Metal Oxides – Novel Oxygen Storage Materials

2003 ◽  
Vol 788 ◽  
Author(s):  
Harry Sarkas ◽  
Patrick G. Murray ◽  
Aaron Fay ◽  
R. W. Brotzman
Keyword(s):  
Particle Size ◽  
Rare Earth ◽  
Storage Capacity ◽  
Rare Earth Oxide ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Nanocrystalline Particle ◽  
Oxygen Storage Material ◽  
The Mean ◽  
Thermal Stability Of

ABSTRACTNanophase Technologies Corporation (NTC) employs a new physical vapor synthesis technique to manufacture ceria-based mixed rare earth oxide nanomaterials. The mixed rare earth oxide nanoparticles are nonporous, dense, discrete crystals. The compositions are solid solutions that remain thermally stable to above 1050°C.Ceria is an active oxygen storage material. Doping ceria with other rare earth metals enhances the thermal stability of nanocrystalline particle size and increases the oxygen storage capacity (OSC). The mean particle size and OSC of ceria-based mixed rare earth oxides are presented as a function of particle composition, morphology, and thermal history.These materials are commercially available and are being engineered for several applications including oxygen storage catalysts and polishing materials.

Autothermal Reforming of Propane Over Ni Catalysts Supported on a Variety of Perovskites

2007 ◽  
Vol 7 (11) ◽  
pp. 4013-4016 ◽  
Author(s):  
SeungSoo Lim ◽  
DongJu Moon ◽  
JongHo Kim ◽  
YoungChul Kim ◽  
NamCook Park ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Storage Capacity ◽  
Flow Reactor ◽  
Oxygen Storage Capacity ◽  
Autothermal Reforming ◽  
Oxygen Storage ◽  
Hydrogen Yield ◽  
Impregnation Method ◽  
Ni Catalysts ◽  
Atmospheric Flow

Autothermal reforming of propane for hydrogen over Ni catalysts supported on a variety of perovskites was performed in an atmospheric flow reactor. Perovskite is known for its higher thermal stability and oxygen storage capacity, but catalytic activity of itself is low. A sites of the ABO3 structured perovskites were occupied by La while B sites by one of Fe, Co, Ni, and Al by citrate method. The composition of the reactant mixture was H2O/C/O2 = 8.96/1.0/1.1. The changes in the states of the catalysts after reaction were analyzed by XRD, TPD, and TGA. Ni/LaAlO3 catalyst maintained the perovskite structure after reaction. It showed higher hydrogen yield and thermal stability compared to those of the catalysts with Fe, Co, or Ni in B sites. Catalysts prepared by deposition-precipitation (DP) method showed higher activity than those prepared by impregnation method, presumably due to the smaller sizes of the NiO crystal particles.

Mn3O4 doped with highly dispersed Zr species: a new non-noble metal oxide with enhanced activity for three-way catalysis

2016 ◽  
Vol 40 (12) ◽  
pp. 10108-10115 ◽  
Author(s):  
Genyuan Zhao ◽  
Jing Li ◽  
Wenshuang Zhu ◽  
Xueqin Ma ◽  
Yonghua Guo ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Manganese Oxide ◽  
Noble Metal ◽  
Storage Capacity ◽  
Catalytic Properties ◽  
Oxygen Storage Capacity ◽  
Oxide Catalysts ◽  
Oxygen Storage ◽  
Highly Dispersed ◽  
Three Way Catalysis

Herein, we demonstrate the influence of zirconium species on promoting the oxygen storage capacity and three-way catalytic properties of zirconium-manganese oxide catalysts.

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