Effect of Ce/Zr Composition on Structure and Properties of Ce1−xZrxO2 Oxides and Related Ni/Ce1−xZrxO2 Catalysts for CO2 Methanation

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Effect of Ce/Zr Composition on Structure and Properties of Ce_1−xZr_xO₂ Oxides and Related Ni/Ce_1−xZr_xO₂ Catalysts for CO₂ Methanation. / Pakharukova, Vera P.; Potemkin, Dmitriy I.; Rogozhnikov, Vladimir N. et al.

In: Nanomaterials, Vol. 12, No. 18, 3207, 09.2022.

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

BibTeX

@article{a51378b5b189428aab1ba6441b817489,

title = "Effect of Ce/Zr Composition on Structure and Properties of Ce1−xZrxO2 Oxides and Related Ni/Ce1−xZrxO2 Catalysts for CO2 Methanation",

abstract = "Ce1−xZrxO2 oxides (x = 0.1, 0.25, 0.5) prepared via the Pechini route were investigated using XRD analysis, N2 physisorption, TEM, and TPR in combination with density functional theory calculations. The Ni/Ce1−xZrxO2 catalysts were characterized via XRD analysis, SEM-EDX, TEM-EDX, and CO chemisorption and tested in carbon dioxide methanation. The obtained Ce1−xZrxO2 materials were single-phase solid solutions. The increase in Zr content intensified crystal structure strains and favored the reducibility of the Ce1−xZrxO2 oxides but strongly affected their microstructure. The catalytic activity of the Ni/Ce1−xZrxO2 catalysts was found to depend on the composition of the Ce1−xZrxO2 supports. The detected negative effect of Zr content on the catalytic activity was attributed to the decrease in the dispersion of the Ni0 nanoparticles and the length of metal–support contacts due to the worsening microstructure of Ce1−xZrxO2 oxides. The improvement of the redox properties of the Ce1−xZrxO2 oxide supports through cation modification can be negated by changes in their microstructure and textural characteristics.",

keywords = "carbon dioxide, methanation, microstructure, mixed oxides, Ni/CeZrO catalysts, structure, Ni/Ce1−xZrxO2 catalysts",

author = "Pakharukova, {Vera P.} and Potemkin, {Dmitriy I.} and Rogozhnikov, {Vladimir N.} and Stonkus, {Olga A.} and Gorlova, {Anna M.} and Nikitina, {Nadezhda A.} and Suprun, {Evgeniy A.} and Brayko, {Andrey S.} and Rogov, {Vladimir A.} and Snytnikov, {Pavel V.}",

note = "Funding Information: This research was funded by the Russian Science Foundation (project 21-73-20075). Publisher Copyright: {\textcopyright} 2022 by the authors.",

year = "2022",

month = sep,

doi = "10.3390/nano12183207",

language = "English",

volume = "12",

journal = "Nanomaterials",

issn = "2079-4991",

publisher = "MDPI AG",

number = "18",

}

RIS

TY - JOUR

T1 - Effect of Ce/Zr Composition on Structure and Properties of Ce1−xZrxO2 Oxides and Related Ni/Ce1−xZrxO2 Catalysts for CO2 Methanation

AU - Pakharukova, Vera P.

AU - Potemkin, Dmitriy I.

AU - Rogozhnikov, Vladimir N.

AU - Stonkus, Olga A.

AU - Gorlova, Anna M.

AU - Nikitina, Nadezhda A.

AU - Suprun, Evgeniy A.

AU - Brayko, Andrey S.

AU - Rogov, Vladimir A.

AU - Snytnikov, Pavel V.

PY - 2022/9

Y1 - 2022/9

N2 - Ce1−xZrxO2 oxides (x = 0.1, 0.25, 0.5) prepared via the Pechini route were investigated using XRD analysis, N2 physisorption, TEM, and TPR in combination with density functional theory calculations. The Ni/Ce1−xZrxO2 catalysts were characterized via XRD analysis, SEM-EDX, TEM-EDX, and CO chemisorption and tested in carbon dioxide methanation. The obtained Ce1−xZrxO2 materials were single-phase solid solutions. The increase in Zr content intensified crystal structure strains and favored the reducibility of the Ce1−xZrxO2 oxides but strongly affected their microstructure. The catalytic activity of the Ni/Ce1−xZrxO2 catalysts was found to depend on the composition of the Ce1−xZrxO2 supports. The detected negative effect of Zr content on the catalytic activity was attributed to the decrease in the dispersion of the Ni0 nanoparticles and the length of metal–support contacts due to the worsening microstructure of Ce1−xZrxO2 oxides. The improvement of the redox properties of the Ce1−xZrxO2 oxide supports through cation modification can be negated by changes in their microstructure and textural characteristics.

AB - Ce1−xZrxO2 oxides (x = 0.1, 0.25, 0.5) prepared via the Pechini route were investigated using XRD analysis, N2 physisorption, TEM, and TPR in combination with density functional theory calculations. The Ni/Ce1−xZrxO2 catalysts were characterized via XRD analysis, SEM-EDX, TEM-EDX, and CO chemisorption and tested in carbon dioxide methanation. The obtained Ce1−xZrxO2 materials were single-phase solid solutions. The increase in Zr content intensified crystal structure strains and favored the reducibility of the Ce1−xZrxO2 oxides but strongly affected their microstructure. The catalytic activity of the Ni/Ce1−xZrxO2 catalysts was found to depend on the composition of the Ce1−xZrxO2 supports. The detected negative effect of Zr content on the catalytic activity was attributed to the decrease in the dispersion of the Ni0 nanoparticles and the length of metal–support contacts due to the worsening microstructure of Ce1−xZrxO2 oxides. The improvement of the redox properties of the Ce1−xZrxO2 oxide supports through cation modification can be negated by changes in their microstructure and textural characteristics.

KW - carbon dioxide

KW - methanation

KW - microstructure

KW - mixed oxides

KW - Ni/CeZrO catalysts

KW - structure

KW - Ni/Ce1−xZrxO2 catalysts

UR - http://www.scopus.com/inward/record.url?scp=85138658864&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/48cd16cb-b1af-3866-b06b-9eac7e6b85d8/

U2 - 10.3390/nano12183207

DO - 10.3390/nano12183207

M3 - Article

C2 - 36144993

AN - SCOPUS:85138658864

VL - 12

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 18

M1 - 3207

ER -

ID: 38048140