Characterisation and activity evaluation of silica supported cobalt and ruthenium catalysts

Matti Reinikainen (Corresponding Author), Marita Niemelä, N. Kakuta, S. Suhonen

Research output: Contribution to journalArticleScientificpeer-review

41 Citations (Scopus)

Abstract

We prepared Co/SiO2, Co–Ru/SiO2 and Ru/SiO2 catalysts by ion-exchange method in an attempt to obtain well dispersed active sites.
The catalysts were characterised by chemisorption, oxygen titration, TPD and XPS, and their activity was evaluated in CO hydrogenation. The results showed that the Co/SiO2 catalyst exhibited a very low extent of reduction, and consequently its hydrogen uptake and activity were very low. In case of CoRu/SiO2, the hydrogen and CO uptake was far much higher than for the physical mixture or for the sum of Co/SiO2 and Ru/SiO2.
Evidently, ruthenium acted as a reduction aid to cobalt in the bimetallic system. Yet, irrespective of the highest uptakes of the CoRu/SiO2 system, the highest activity in CO hydrogenation was obtained with the Ru/SiO2 catalyst.
The synergistic performance of the CoRu catalyst was, however, evidenced by the unusually high formation of methanol – a novel finding which indicates that neither of the metals was present as a pure entity in the bimetallic system.
Original languageEnglish
Pages (from-to)61-75
JournalApplied Catalysis A: General
Volume174
Issue number1-2
DOIs
Publication statusPublished - 1998
MoE publication typeA1 Journal article-refereed

Fingerprint

Ruthenium
Cobalt
Silicon Dioxide
Silica
Carbon Monoxide
Catalysts
Hydrogenation
Hydrogen
Temperature programmed desorption
Chemisorption
Titration
Methanol
Ion exchange
X ray photoelectron spectroscopy
Metals
Oxygen

Keywords

  • cobalt
  • ruthenium
  • catalyst preparation
  • CO hydrogenation
  • Fischer-Tropsch synthesis

Cite this

Reinikainen, Matti ; Niemelä, Marita ; Kakuta, N. ; Suhonen, S. / Characterisation and activity evaluation of silica supported cobalt and ruthenium catalysts. In: Applied Catalysis A: General. 1998 ; Vol. 174, No. 1-2. pp. 61-75.
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abstract = "We prepared Co/SiO2, Co–Ru/SiO2 and Ru/SiO2 catalysts by ion-exchange method in an attempt to obtain well dispersed active sites. The catalysts were characterised by chemisorption, oxygen titration, TPD and XPS, and their activity was evaluated in CO hydrogenation. The results showed that the Co/SiO2 catalyst exhibited a very low extent of reduction, and consequently its hydrogen uptake and activity were very low. In case of CoRu/SiO2, the hydrogen and CO uptake was far much higher than for the physical mixture or for the sum of Co/SiO2 and Ru/SiO2. Evidently, ruthenium acted as a reduction aid to cobalt in the bimetallic system. Yet, irrespective of the highest uptakes of the CoRu/SiO2 system, the highest activity in CO hydrogenation was obtained with the Ru/SiO2 catalyst. The synergistic performance of the CoRu catalyst was, however, evidenced by the unusually high formation of methanol – a novel finding which indicates that neither of the metals was present as a pure entity in the bimetallic system.",
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Characterisation and activity evaluation of silica supported cobalt and ruthenium catalysts. / Reinikainen, Matti (Corresponding Author); Niemelä, Marita; Kakuta, N.; Suhonen, S.

In: Applied Catalysis A: General, Vol. 174, No. 1-2, 1998, p. 61-75.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Characterisation and activity evaluation of silica supported cobalt and ruthenium catalysts

AU - Reinikainen, Matti

AU - Niemelä, Marita

AU - Kakuta, N.

AU - Suhonen, S.

PY - 1998

Y1 - 1998

N2 - We prepared Co/SiO2, Co–Ru/SiO2 and Ru/SiO2 catalysts by ion-exchange method in an attempt to obtain well dispersed active sites. The catalysts were characterised by chemisorption, oxygen titration, TPD and XPS, and their activity was evaluated in CO hydrogenation. The results showed that the Co/SiO2 catalyst exhibited a very low extent of reduction, and consequently its hydrogen uptake and activity were very low. In case of CoRu/SiO2, the hydrogen and CO uptake was far much higher than for the physical mixture or for the sum of Co/SiO2 and Ru/SiO2. Evidently, ruthenium acted as a reduction aid to cobalt in the bimetallic system. Yet, irrespective of the highest uptakes of the CoRu/SiO2 system, the highest activity in CO hydrogenation was obtained with the Ru/SiO2 catalyst. The synergistic performance of the CoRu catalyst was, however, evidenced by the unusually high formation of methanol – a novel finding which indicates that neither of the metals was present as a pure entity in the bimetallic system.

AB - We prepared Co/SiO2, Co–Ru/SiO2 and Ru/SiO2 catalysts by ion-exchange method in an attempt to obtain well dispersed active sites. The catalysts were characterised by chemisorption, oxygen titration, TPD and XPS, and their activity was evaluated in CO hydrogenation. The results showed that the Co/SiO2 catalyst exhibited a very low extent of reduction, and consequently its hydrogen uptake and activity were very low. In case of CoRu/SiO2, the hydrogen and CO uptake was far much higher than for the physical mixture or for the sum of Co/SiO2 and Ru/SiO2. Evidently, ruthenium acted as a reduction aid to cobalt in the bimetallic system. Yet, irrespective of the highest uptakes of the CoRu/SiO2 system, the highest activity in CO hydrogenation was obtained with the Ru/SiO2 catalyst. The synergistic performance of the CoRu catalyst was, however, evidenced by the unusually high formation of methanol – a novel finding which indicates that neither of the metals was present as a pure entity in the bimetallic system.

KW - cobalt

KW - ruthenium

KW - catalyst preparation

KW - CO hydrogenation

KW - Fischer-Tropsch synthesis

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