Dynamical Properties of a Ru/MgAl2O4 Catalyst during Reduction and Dry Methane Reforming

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Dynamical Properties of a Ru/MgAl2O4 Catalyst during Reduction and Dry Methane Reforming. / Kehres, Jan; Jakobsen, Jon Geest ; Andreasen, Jens Wenzel; Wagner, Jakob Birkedal; Liu, Haihua; Molenbroek, Alfons ; Sehested, Jens; Chorkendorff, Ib; Vegge, Tejs.

In: The Journal of Physical Chemistry Part C: Nanomaterials, Interfaces and Hard Matter, Vol. 116, 2012, p. 21407−21415.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Author

Kehres, Jan; Jakobsen, Jon Geest ; Andreasen, Jens Wenzel; Wagner, Jakob Birkedal; Liu, Haihua; Molenbroek, Alfons ; Sehested, Jens; Chorkendorff, Ib; Vegge, Tejs / Dynamical Properties of a Ru/MgAl2O4 Catalyst during Reduction and Dry Methane Reforming.

In: The Journal of Physical Chemistry Part C: Nanomaterials, Interfaces and Hard Matter, Vol. 116, 2012, p. 21407−21415.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{b37d0a7c4f094df587b3108d5d441213,
title = "Dynamical Properties of a Ru/MgAl2O4 Catalyst during Reduction and Dry Methane Reforming",
publisher = "American Chemical Society",
author = "Jan Kehres and Jakobsen, {Jon Geest} and Andreasen, {Jens Wenzel} and Wagner, {Jakob Birkedal} and Haihua Liu and Alfons Molenbroek and Jens Sehested and Ib Chorkendorff and Tejs Vegge",
year = "2012",
doi = "10.1021/jp3069656",
volume = "116",
pages = "21407−21415",
journal = "The Journal of Physical Chemistry Part C: Nanomaterials, Interfaces and Hard Matter",
issn = "1932-7447",

}

RIS

TY - JOUR

T1 - Dynamical Properties of a Ru/MgAl<sub>2</sub>O<sub>4</sub> Catalyst during Reduction and Dry Methane Reforming

A1 - Kehres,Jan

A1 - Jakobsen,Jon Geest

A1 - Andreasen,Jens Wenzel

A1 - Wagner,Jakob Birkedal

A1 - Liu,Haihua

A1 - Molenbroek,Alfons

A1 - Sehested,Jens

A1 - Chorkendorff,Ib

A1 - Vegge,Tejs

AU - Kehres,Jan

AU - Jakobsen,Jon Geest

AU - Andreasen,Jens Wenzel

AU - Wagner,Jakob Birkedal

AU - Liu,Haihua

AU - Molenbroek,Alfons

AU - Sehested,Jens

AU - Chorkendorff,Ib

AU - Vegge,Tejs

PB - American Chemical Society

PY - 2012

Y1 - 2012

N2 - Combined in situ small- and wide-angle X-ray scattering (SAXS/WAXS) studies were performed in a new laboratory setup to investigate the dynamical properties of a ruthenium/spinel (Ru/MgAl2O4) catalyst, w(Ru) = 4 wt %, during the reduction and subsequent dry methane reforming. The Ru particles in the fresh catalyst sample were found to be partially oxidized. High-resolution transmission electron microscopy (HRTEM) indicated a coexistence of pure Ru and RuO2 nanoparticles. Reduction in hydrogen occurred at a temperature between 373 and 393 K. The mean particle diameter as refined from SAXS of the size regime attributed to scattering from Ru/RuO2-particles decreases slightly by about 0.2 nm during the reduction. Dry methane reforming experiments were performed in a temperature interval from 723 to 1023 K by applying a gas mixture of carbon dioxide and methane in molar ratio of 3:1. The catalyst did not show any deactivation during the experiment of overall 32 h, indicated by stable turnover frequencies for methane. The mean Ru-particle diameter remained constant during the dry methane reforming experiments, revealing a high sintering stability of the Ru/MgAl2O4 catalyst.

AB - Combined in situ small- and wide-angle X-ray scattering (SAXS/WAXS) studies were performed in a new laboratory setup to investigate the dynamical properties of a ruthenium/spinel (Ru/MgAl2O4) catalyst, w(Ru) = 4 wt %, during the reduction and subsequent dry methane reforming. The Ru particles in the fresh catalyst sample were found to be partially oxidized. High-resolution transmission electron microscopy (HRTEM) indicated a coexistence of pure Ru and RuO2 nanoparticles. Reduction in hydrogen occurred at a temperature between 373 and 393 K. The mean particle diameter as refined from SAXS of the size regime attributed to scattering from Ru/RuO2-particles decreases slightly by about 0.2 nm during the reduction. Dry methane reforming experiments were performed in a temperature interval from 723 to 1023 K by applying a gas mixture of carbon dioxide and methane in molar ratio of 3:1. The catalyst did not show any deactivation during the experiment of overall 32 h, indicated by stable turnover frequencies for methane. The mean Ru-particle diameter remained constant during the dry methane reforming experiments, revealing a high sintering stability of the Ru/MgAl2O4 catalyst.

U2 - 10.1021/jp3069656

DO - 10.1021/jp3069656

JO - The Journal of Physical Chemistry Part C: Nanomaterials, Interfaces and Hard Matter

JF - The Journal of Physical Chemistry Part C: Nanomaterials, Interfaces and Hard Matter

SN - 1932-7447

VL - 116

SP - 21407−21415

ER -