The effect of support surface hydroxyls on selective CO methanation with Ru based catalysts

L. M. Martínez T; A. Muñoz; A. Pérez; O. H. Laguna; L. F. Bobadilla; M. A. Centeno; J. A. Odriozola

doi:10.1016/j.apcata.2022.118678

The effect of support surface hydroxyls on selective CO methanation with Ru based catalysts

L. M. Martínez T, A. Muñoz, A. Pérez, O. H. Laguna, L. F. Bobadilla, M. A. Centeno, J. A. Odriozola

Department of Chemistry

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

8 Scopus citations

Abstract

The aim of this work was to clarify the effect of the support on CO selective methanation with Ru/TiO₂ catalysts. TPR, XRD and TEM measurements confirmed that the changes in the activity and selectivity should be ascribed to anatase:rutile ratio, RuO₂ +TiO₂ solid solution formation, as well as the metal content and the thermal treatment used. All these characteristics result in active and selective catalysts in which the suppression of the reverse water gas shift reaction was observed. The catalytic performance must be explained by both the formation of more active Ru species as a result of support influence and the higher Ru dispersion. The study allows to conclude that for CO activation the role of support surface hydroxyls seems to be determinant for both the activity and selectivity of Ru/TiO₂ catalysts.

Original language	English
Article number	118678
Journal	Applied Catalysis A: General
Volume	641
DOIs	https://doi.org/10.1016/j.apcata.2022.118678
State	Published - 05 Jul 2022

Keywords

CO methanation
CO methanation
Ru/TiO catalysts
RuO rutile
Support surface hydroxyls
TiO anatase
TiO rutile

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10.1016/j.apcata.2022.118678

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title = "The effect of support surface hydroxyls on selective CO methanation with Ru based catalysts",

abstract = "The aim of this work was to clarify the effect of the support on CO selective methanation with Ru/TiO2 catalysts. TPR, XRD and TEM measurements confirmed that the changes in the activity and selectivity should be ascribed to anatase:rutile ratio, RuO2 +TiO2 solid solution formation, as well as the metal content and the thermal treatment used. All these characteristics result in active and selective catalysts in which the suppression of the reverse water gas shift reaction was observed. The catalytic performance must be explained by both the formation of more active Ru species as a result of support influence and the higher Ru dispersion. The study allows to conclude that for CO activation the role of support surface hydroxyls seems to be determinant for both the activity and selectivity of Ru/TiO2 catalysts.",

keywords = "CO methanation, CO methanation, Ru/TiO catalysts, RuO rutile, Support surface hydroxyls, TiO anatase, TiO rutile",

author = "{Mart{\'i}nez T}, {L. M.} and A. Mu{\~n}oz and A. P{\'e}rez and Laguna, {O. H.} and Bobadilla, {L. F.} and Centeno, {M. A.} and Odriozola, {J. A.}",

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year = "2022",

month = jul,

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doi = "10.1016/j.apcata.2022.118678",

language = "English",

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journal = "Applied Catalysis A: General",

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TY - JOUR

T1 - The effect of support surface hydroxyls on selective CO methanation with Ru based catalysts

AU - Martínez T, L. M.

AU - Muñoz, A.

AU - Pérez, A.

AU - Laguna, O. H.

AU - Bobadilla, L. F.

AU - Centeno, M. A.

AU - Odriozola, J. A.

PY - 2022/7/5

Y1 - 2022/7/5

N2 - The aim of this work was to clarify the effect of the support on CO selective methanation with Ru/TiO2 catalysts. TPR, XRD and TEM measurements confirmed that the changes in the activity and selectivity should be ascribed to anatase:rutile ratio, RuO2 +TiO2 solid solution formation, as well as the metal content and the thermal treatment used. All these characteristics result in active and selective catalysts in which the suppression of the reverse water gas shift reaction was observed. The catalytic performance must be explained by both the formation of more active Ru species as a result of support influence and the higher Ru dispersion. The study allows to conclude that for CO activation the role of support surface hydroxyls seems to be determinant for both the activity and selectivity of Ru/TiO2 catalysts.

AB - The aim of this work was to clarify the effect of the support on CO selective methanation with Ru/TiO2 catalysts. TPR, XRD and TEM measurements confirmed that the changes in the activity and selectivity should be ascribed to anatase:rutile ratio, RuO2 +TiO2 solid solution formation, as well as the metal content and the thermal treatment used. All these characteristics result in active and selective catalysts in which the suppression of the reverse water gas shift reaction was observed. The catalytic performance must be explained by both the formation of more active Ru species as a result of support influence and the higher Ru dispersion. The study allows to conclude that for CO activation the role of support surface hydroxyls seems to be determinant for both the activity and selectivity of Ru/TiO2 catalysts.

KW - CO methanation

KW - Ru/TiO catalysts

KW - RuO rutile

KW - Support surface hydroxyls

KW - TiO anatase

KW - TiO rutile

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U2 - 10.1016/j.apcata.2022.118678

DO - 10.1016/j.apcata.2022.118678

M3 - Article

AN - SCOPUS:85130844936

SN - 0926-860X

VL - 641

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

M1 - 118678

ER -

The effect of support surface hydroxyls on selective CO methanation with Ru based catalysts

Abstract

Keywords

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