Thermally robust core–shell material for automotive 3-way catalysis having oxygen storage capacity

RSC Advances ◽  
2015 ◽  
Vol 5 (60) ◽  
pp. 48851-48855 ◽  
Author(s):  
K. L. Stamm Masias ◽  
T. C. Peck ◽  
P. T. Fanson
Keyword(s):  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Core Shell ◽  
Shell Material ◽  
Platinum Particles

A thermally robust coating prevents sintering of platinum particles and adds functionality by exhibiting oxygen storage and release.

scholarly journals Core-Shell Fe2O3@La1−xSrxFeO3−δ Material for Catalytic Oxidations: Coverage of Iron Oxide Core, Oxygen Storage Capacity and Reactivity of Surface Oxygens

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7355
Author(s):  
Hen Ohayon Dahan ◽  
Miron V. Landau ◽  
Roxana Vidruk Nehemya ◽  
Eran Edri ◽  
Moti Herskowitz ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Cross Sections ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Core Shell ◽  
Oxygen Species ◽  
Surface Oxygen ◽  
Redox Reactivity ◽  
Iron Oxide Core

A series of Fe2O3@LSF (La0.8Sr0.2FeO3−δ perovskite) core-shell materials (CSM) was prepared by infiltration of LSF precursors gel containing various complexants and their mixtures to nanocrystalline aggregates of hematite followed by thermal treatment. The content of LSF phase and amount of carboxyl groups in complexant determine the percent coverage of iron oxide core with the LSF shell. The most conformal coating core-shell material was prepared with citric acid as the complexant, contained 60 wt% LSF with 98% core coverage. The morphology of the CSM was studied by HRTEM-EELS combined with SEM-FIB for particles cross-sections. The reactivity of surface oxygen species and their amounts were determined by H2-TPR, TGA-DTG, the oxidation state of surface oxygen ions by XPS. It was found that at complete core coverage with perovskite shell, the distribution of surface oxygen species according to redox reactivity in CSM resemble pure LSF, but its lattice oxygen storage capacity is 2–2.5 times higher. At partial coverage, the distribution of surface oxygen species according to redox reactivity resembles that in iron oxide.

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.

Oxygen Storage Capacity (OSC) Measurement of 3-Way Automotive Catalysts Using the CATAGEN OMEGA Test Reactor

2021 ◽  
Author(s):  
Liam Mc Grane ◽  
Roy Douglas ◽  
Kurtis Irwin ◽  
Andrew Woods ◽  
Jonathan Stewart ◽  
...  
Keyword(s):  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Automotive Catalysts ◽  
Test Reactor

Oxygen storage capacity of monolith three-way catalysts

1985 ◽  
Vol 17 (1) ◽  
pp. 75-86 ◽  
Author(s):  
E.C. Su ◽  
C.N. Montreuil ◽  
W.G. Rothschild
Keyword(s):  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage

Influence of transition metal electronegativity on the oxygen storage capacity of perovskite oxides

2016 ◽  
Vol 52 (68) ◽  
pp. 10369-10372 ◽  
Author(s):  
Lu Liu ◽  
Daniel D. Taylor ◽  
Efrain E. Rodriguez ◽  
Michael R. Zachariah
Keyword(s):  
Transition Metal ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Perovskite Oxides ◽  
Oxygen Storage ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Oxygen Carriers ◽  
Practical Development ◽  
Selection Of

The selection of highly efficient oxygen carriers (OCs) is a key step necessary for the practical development of chemical looping combustion (CLC).

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