Effect of oxidation–reduction treatments on the infrared spectra of carbon monoxide chemisorbed on a Ru/TiO<sub>2</sub>catalyst

Guglielminotti, E.; Bond, Geoffrey C.

doi:10.1039/ft9908600979

Cited by 51 publications

(50 citation statements)

References 27 publications

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“…Therefore, it seems to be resonable to assume an oxidation state of +2 for Ru in the tricarbonyls as already proposed by several authors [e.g. 4,5].…”

Section: Resultsmentioning

confidence: 83%

<title>Surface carbonyl species on highly dealuminated NaY zeolite: an FTIR investigation</title>

Landmesser¹,

Burkhardt²,

Mießner³

1992

SPIE Proceedings

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“…Therefore, it seems to be resonable to assume an oxidation state of +2 for Ru in the tricarbonyls as already proposed by several authors [e.g. 4,5].…”

Section: Resultsmentioning

confidence: 83%

<title>Surface carbonyl species on highly dealuminated NaY zeolite: an FTIR investigation</title>

Landmesser¹,

Burkhardt²,

Mießner³

1992

SPIE Proceedings

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“…The CH x spectral region shows the typical CH ) [11], appear after about 100 min on stream on the four Ru/zeolite catalyst [38,48]. These bands grow steadily in intensity and do not saturate over 1000 min.…”

Section: In-situ Drifts Measurementsmentioning

confidence: 99%

“…The measurements were , depending on the CO content in the gas mixture, which are generally attributed to CO adsorbed in a linear or bridged configuration on the Ru NPs, respectively [24, [35][36][37][38][39][40][41][42][43]. A signal at 2075 cm -1 was assigned previously to CO adsorbed on Ru n+ species [40,44].…”

Section: In-situ Drifts Measurementsmentioning

confidence: 99%

Influence of the catalyst loading on the activity and the CO selectivity of supported Ru catalysts in the selective methanation of CO in CO2 containing feed gases

Eckle

Augustin

Anfang³

et al. 2012

Catalysis Today

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We have investigated the methanation of CO and CO 2 over Ru/zeolite catalysts with different Ru loading in semi-realistic reformate gases by in situ X-ray absorption spectroscopy (XAS), in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and kinetic measurements. Increasing the Ru loading causes an increase of the mean particle size from 0.9 nm (2.2 wt.% Ru) to 1.9 nm (5.6 wt.% Ru). At the same time, also the activity for CO methanation increases, while the selectivity for CO methanation, which is constant at 100% for reformate gases with 0.6% CO, decreases at low CO contents. The latter findings are interpreted in terms of a change in the physical effects governing the selectivity for CO methanation with increasing Ru particle size, from an inherently low activity for CO 2 dissociation and subsequent CO ad methanation on very small Ru nanoparticles to a site blocking mechanism on larger Ru nanoparticles. In the latter mechanism, CO 2 methanation is hindered by a reaction inhibiting adlayer of CO at higher CO ad coverages, i.e., at not too low CO concentrations, but facile in the absence of a CO adlayer, at lower CO concentrations in the reaction gas mixture.

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“…[34,36,37] Another mechanisminvolves the oxidation of metallicRui nduced by the reaction of adsorbed CO and hydroxyl groups of the support. [35][36][37] In this region, there are bandst hat can be ascribed to the linear CO adsorption on faces and steps of Ru crystallites. [35][36][37] In this region, there are bandst hat can be ascribed to the linear CO adsorption on faces and steps of Ru crystallites.…”

Section: Co-ftirstudiesmentioning

confidence: 99%

Enhanced Production of γ‐Valerolactone with an Internal Source of Hydrogen on Ca‐Modified TiO₂ Supported Ru Catalysts

et al. 2019

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Invited for this month's cover are the groups from Lodz University of Technology (Poland) and from the University of Strasbourg (France). The image shows the interest of a fine light‐driven tuning of the ruthenium nanoparticle size on titania supports for designing highly active and selective catalysts for biomass valorization. The Full paper itself is available at https://doi.org/10.1002/cssc.201801947.

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Effect of oxidation–reduction treatments on the infrared spectra of carbon monoxide chemisorbed on a Ru/TiO₂catalyst

Cited by 51 publications

References 27 publications

<title>Surface carbonyl species on highly dealuminated NaY zeolite: an FTIR investigation</title>

<title>Surface carbonyl species on highly dealuminated NaY zeolite: an FTIR investigation</title>

Influence of the catalyst loading on the activity and the CO selectivity of supported Ru catalysts in the selective methanation of CO in CO2 containing feed gases

Enhanced Production of γ‐Valerolactone with an Internal Source of Hydrogen on Ca‐Modified TiO₂ Supported Ru Catalysts

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Effect of oxidation–reduction treatments on the infrared spectra of carbon monoxide chemisorbed on a Ru/TiO2catalyst

Cited by 51 publications

References 27 publications

<title>Surface carbonyl species on highly dealuminated NaY zeolite: an FTIR investigation</title>

<title>Surface carbonyl species on highly dealuminated NaY zeolite: an FTIR investigation</title>

Influence of the catalyst loading on the activity and the CO selectivity of supported Ru catalysts in the selective methanation of CO in CO2 containing feed gases

Enhanced Production of γ‐Valerolactone with an Internal Source of Hydrogen on Ca‐Modified TiO2 Supported Ru Catalysts

Contact Info

Product

Resources

About

Effect of oxidation–reduction treatments on the infrared spectra of carbon monoxide chemisorbed on a Ru/TiO₂catalyst

Enhanced Production of γ‐Valerolactone with an Internal Source of Hydrogen on Ca‐Modified TiO₂ Supported Ru Catalysts