Atomically dispersed cerium species in NMxCe1-xO2/Al2O3 (NM = Rh, Ru) catalysts

K. A. Ledwa; L. Kepinski; M. Pawlyta

doi:10.1016/j.materresbull.2019.110673

Atomically dispersed cerium species in NM_xCe_1-xO₂/Al₂O₃ (NM = Rh, Ru) catalysts

K. A. Ledwa
, L. Kepinski
, M. Pawlyta

Materials Testing Laboratory (RMT/RMT L1)

Polish Academy of Sciences

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

NM_xCe_1-xO₂/Al₂O₃ (NM = Rh, Ru; 0 < x < 0.15) catalysts prepared by a microemulsion method contain, in addition to ceria nanoparticles, an atomically dispersed CeO_x species that may be detected by high-resolution HAADF-STEM imaging. The CeO_x species exist also in the samples subjected to high temperature treatment in oxidizing and reducing atmosphere, but their concentration increases rapidly after reduction above 700 °C. Generation of CeO_x groups and their spreading over the alumina surface explains the effect of amorphization of ceria particles observed by XRD method.

Original language	English
Article number	110673
Journal	Materials Research Bulletin
Volume	122
DOIs	https://doi.org/10.1016/j.materresbull.2019.110673
Publication status	Published - Feb 2020

Keywords

Atomic dispersion
Catalyst
CeO
CeO/AlO
Ceria-Alumina
HAADF-STEM

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.materresbull.2019.110673

Cite this

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title = "Atomically dispersed cerium species in NMxCe1-xO2/Al2O3 (NM = Rh, Ru) catalysts",

abstract = "NMxCe1-xO2/Al2O3 (NM = Rh, Ru; 0 < x < 0.15) catalysts prepared by a microemulsion method contain, in addition to ceria nanoparticles, an atomically dispersed CeOx species that may be detected by high-resolution HAADF-STEM imaging. The CeOx species exist also in the samples subjected to high temperature treatment in oxidizing and reducing atmosphere, but their concentration increases rapidly after reduction above 700 °C. Generation of CeOx groups and their spreading over the alumina surface explains the effect of amorphization of ceria particles observed by XRD method.",

keywords = "Atomic dispersion, Catalyst, CeO, CeO/AlO, Ceria-Alumina, HAADF-STEM",

author = "Ledwa, \{K. A.\} and L. Kepinski and M. Pawlyta",

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year = "2020",

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language = "English",

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journal = "Materials Research Bulletin",

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T1 - Atomically dispersed cerium species in NMxCe1-xO2/Al2O3 (NM = Rh, Ru) catalysts

AU - Ledwa, K. A.

AU - Kepinski, L.

AU - Pawlyta, M.

PY - 2020/2

Y1 - 2020/2

N2 - NMxCe1-xO2/Al2O3 (NM = Rh, Ru; 0 < x < 0.15) catalysts prepared by a microemulsion method contain, in addition to ceria nanoparticles, an atomically dispersed CeOx species that may be detected by high-resolution HAADF-STEM imaging. The CeOx species exist also in the samples subjected to high temperature treatment in oxidizing and reducing atmosphere, but their concentration increases rapidly after reduction above 700 °C. Generation of CeOx groups and their spreading over the alumina surface explains the effect of amorphization of ceria particles observed by XRD method.

AB - NMxCe1-xO2/Al2O3 (NM = Rh, Ru; 0 < x < 0.15) catalysts prepared by a microemulsion method contain, in addition to ceria nanoparticles, an atomically dispersed CeOx species that may be detected by high-resolution HAADF-STEM imaging. The CeOx species exist also in the samples subjected to high temperature treatment in oxidizing and reducing atmosphere, but their concentration increases rapidly after reduction above 700 °C. Generation of CeOx groups and their spreading over the alumina surface explains the effect of amorphization of ceria particles observed by XRD method.

KW - Atomic dispersion

KW - Catalyst

KW - CeO

KW - CeO/AlO

KW - Ceria-Alumina

KW - HAADF-STEM

UR - https://www.scopus.com/pages/publications/85074154716

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DO - 10.1016/j.materresbull.2019.110673

M3 - Article

AN - SCOPUS:85074154716

SN - 0025-5408

VL - 122

JO - Materials Research Bulletin

JF - Materials Research Bulletin

M1 - 110673

ER -

Atomically dispersed cerium species in NM_xCe_1-xO₂/Al₂O₃ (NM = Rh, Ru) catalysts

Abstract

Keywords

ASJC Scopus subject areas

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Cite this

Atomically dispersed cerium species in NMxCe1-xO2/Al2O3 (NM = Rh, Ru) catalysts

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

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Cite this

Atomically dispersed cerium species in NM_xCe_1-xO₂/Al₂O₃ (NM = Rh, Ru) catalysts