H2/D2 exchange reaction on mono-disperse Pt clusters: enhanced activity from minute O2 concentrations

Jakob Nordheim Riedel; Marian David Rötzer; Mikkel Jørgensen; Ulrik Grønbjerg Vej-Hansen; Thomas Pedersen; Béla Sebök; Florian Frank Schweinberger; Peter Christian Kjærgaard Vesborg; Ole Hansen; Jakob Schiøtz; Ulrich Heiz; Ib Chorkendorff

doi:10.1039/c6cy00756b

H₂/D₂ exchange reaction on mono-disperse Pt clusters: enhanced activity from minute O₂ concentrations

Jakob Nordheim Riedel, Marian David Rötzer, Mikkel Jørgensen, Ulrik Grønbjerg Vej-Hansen, Thomas Pedersen, Béla Sebök, Florian Frank Schweinberger, Peter Christian Kjærgaard Vesborg, Ole Hansen, Jakob Schiøtz, Ulrich Heiz, Ib Chorkendorff

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Abstract

The H₂/D₂ exchange reaction was studied on mono-disperse Pt₈ clusters in a μ-reactor. The chemical activity was studied at temperatures varying from room temperature to 180 °C using mass spectrometry. It was found that minute amounts of O₂ in the gas stream increased the chemical activity significantly. XPS and ISS before and after reaction suggest little or no sintering during reaction. A reaction pathway is suggested based on DFT. H₂ desorption is identified as the rate-limiting step and O₂ is confirmed as the source of the increased activity. The binding energy of platinum atoms in a SiO₂ supported Pt₈ cluster is found to be comparable to the interatomic binding energies of bulk platinum, underlining the stability of the model system.

Original language	English
Journal	Catalysis Science & Technology
Volume	6
Issue number	18
Pages (from-to)	6893-6900
Number of pages	8
ISSN	2044-4753
DOIs	https://doi.org/10.1039/c6cy00756b
Publication status	Published - 2016

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Riedel, J. N., Rötzer, M. D., Jørgensen, M., Vej-Hansen, U. G., Pedersen, T., Sebök, B., Schweinberger, F. F., Vesborg, P. C. K., Hansen, O., Schiøtz, J., Heiz, U., & Chorkendorff, I. (2016). H₂/D₂ exchange reaction on mono-disperse Pt clusters: enhanced activity from minute O₂ concentrations. Catalysis Science & Technology, 6(18), 6893-6900. https://doi.org/10.1039/c6cy00756b

@article{de09667a0087473e970d7e59a360fb30,

title = "H2/D2 exchange reaction on mono-disperse Pt clusters: enhanced activity from minute O2 concentrations",

abstract = "The H2/D2 exchange reaction was studied on mono-disperse Pt8 clusters in a μ-reactor. The chemical activity was studied at temperatures varying from room temperature to 180 °C using mass spectrometry. It was found that minute amounts of O2 in the gas stream increased the chemical activity significantly. XPS and ISS before and after reaction suggest little or no sintering during reaction. A reaction pathway is suggested based on DFT. H2 desorption is identified as the rate-limiting step and O2 is confirmed as the source of the increased activity. The binding energy of platinum atoms in a SiO2 supported Pt8 cluster is found to be comparable to the interatomic binding energies of bulk platinum, underlining the stability of the model system.",

author = "Riedel, {Jakob Nordheim} and R{\"o}tzer, {Marian David} and Mikkel J{\o}rgensen and Vej-Hansen, {Ulrik Gr{\o}nbjerg} and Thomas Pedersen and B{\'e}la Seb{\"o}k and Schweinberger, {Florian Frank} and Vesborg, {Peter Christian Kj{\ae}rgaard} and Ole Hansen and Jakob Schi{\o}tz and Ulrich Heiz and Ib Chorkendorff",

year = "2016",

doi = "10.1039/c6cy00756b",

language = "English",

volume = "6",

pages = "6893--6900",

journal = "Catalysis Science & Technology",

issn = "2044-4753",

publisher = "Royal Society of Chemistry",

number = "18",

}

Riedel, JN, Rötzer, MD, Jørgensen, M, Vej-Hansen, UG, Pedersen, T, Sebök, B, Schweinberger, FF, Vesborg, PCK , Hansen, O , Schiøtz, J, Heiz, U & Chorkendorff, I 2016, 'H₂/D₂ exchange reaction on mono-disperse Pt clusters: enhanced activity from minute O₂ concentrations', Catalysis Science & Technology, vol. 6, no. 18, pp. 6893-6900. https://doi.org/10.1039/c6cy00756b

TY - JOUR

T1 - H2/D2 exchange reaction on mono-disperse Pt clusters: enhanced activity from minute O2 concentrations

AU - Riedel, Jakob Nordheim

AU - Rötzer, Marian David

AU - Jørgensen, Mikkel

AU - Vej-Hansen, Ulrik Grønbjerg

AU - Pedersen, Thomas

AU - Sebök, Béla

AU - Schweinberger, Florian Frank

AU - Vesborg, Peter Christian Kjærgaard

AU - Hansen, Ole

AU - Schiøtz, Jakob

AU - Heiz, Ulrich

AU - Chorkendorff, Ib

PY - 2016

Y1 - 2016

N2 - The H2/D2 exchange reaction was studied on mono-disperse Pt8 clusters in a μ-reactor. The chemical activity was studied at temperatures varying from room temperature to 180 °C using mass spectrometry. It was found that minute amounts of O2 in the gas stream increased the chemical activity significantly. XPS and ISS before and after reaction suggest little or no sintering during reaction. A reaction pathway is suggested based on DFT. H2 desorption is identified as the rate-limiting step and O2 is confirmed as the source of the increased activity. The binding energy of platinum atoms in a SiO2 supported Pt8 cluster is found to be comparable to the interatomic binding energies of bulk platinum, underlining the stability of the model system.

AB - The H2/D2 exchange reaction was studied on mono-disperse Pt8 clusters in a μ-reactor. The chemical activity was studied at temperatures varying from room temperature to 180 °C using mass spectrometry. It was found that minute amounts of O2 in the gas stream increased the chemical activity significantly. XPS and ISS before and after reaction suggest little or no sintering during reaction. A reaction pathway is suggested based on DFT. H2 desorption is identified as the rate-limiting step and O2 is confirmed as the source of the increased activity. The binding energy of platinum atoms in a SiO2 supported Pt8 cluster is found to be comparable to the interatomic binding energies of bulk platinum, underlining the stability of the model system.

U2 - 10.1039/c6cy00756b

DO - 10.1039/c6cy00756b

M3 - Journal article

VL - 6

SP - 6893

EP - 6900

JO - Catalysis Science & Technology

JF - Catalysis Science & Technology

SN - 2044-4753

IS - 18