Atomic-Scale View on the H2O Formation Reaction from H2 on O-Rich RuO2(110)

Yinying Wei; Umberto Martinez; Lutz Lammich; Flemming Besenbacher; Stefan Wendt

doi:10.1021/jp509510j

Atomic-Scale View on the H₂O Formation Reaction from H₂ on O-Rich RuO₂(110)

Yinying Wei, Umberto Martinez, Lutz Lammich, Flemming Besenbacher, Stefan Wendt

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Abstract

The H2O formation reaction from H-2 on O-rich RuO2(110) was studied by temperature-programmed desorption and reaction (TPD/TPR) and scanning tunneling microscopy (STM) measurements and density functional theory (DFT) calculations. On the one hand, following H-2 adsorption at 270 K, our TPD/TPR measurements reveal that the on-top O species (Oot) enhances the sticking probability of H-2, thus facilitating the H-2 adsorption and dissociation on O-rich RuO2(110). On the other hand, for low H-2 adsorption temperature (170 K), the limited mobility of Had species hinders H-2 adsorption at a high coverage of preadsorbed Oot. To better understand the strong influence of the adsorption temperature and the interplay between coadsorbed species, we conducted DFT calculations and high-resolution STM measurements. Two distinct adsorbate configurations, Had-Oot and Oot-Had-Oot, are identified by STM. Mechanisms and molecular models for H-2 dissociation and Had diffusion on O-rich RuO2(110) are proposed.

Original language	English
Journal	The Journal of Physical Chemistry Part C
Volume	118
Issue	48
Pages (from-to)	27989-27997
Number of pages	9
ISSN	1932-7447
DOIs	https://doi.org/10.1021/jp509510j
Publication status	Published - Nov 2014

Keywords

SCANNING-TUNNELING-MICROSCOPY; SURFACE-CHEMISTRY; RUTHENIUM DIOXIDE
RuO2(110)
PHOTOCATALYSIS
HYDROGEN
OXYGEN
water formation
OXIDE SURFACE

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10.1021/jp509510j

Cite this

@article{614c82878f144d4b8bb4cbf5c7cdeedd,

title = "Atomic-Scale View on the H2O Formation Reaction from H2 on O-Rich RuO2(110)",

abstract = "The H2O formation reaction from H-2 on O-rich RuO2(110) was studied by temperature-programmed desorption and reaction (TPD/TPR) and scanning tunneling microscopy (STM) measurements and density functional theory (DFT) calculations. On the one hand, following H-2 adsorption at 270 K, our TPD/TPR measurements reveal that the on-top O species (Oot) enhances the sticking probability of H-2, thus facilitating the H-2 adsorption and dissociation on O-rich RuO2(110). On the other hand, for low H-2 adsorption temperature (170 K), the limited mobility of Had species hinders H-2 adsorption at a high coverage of preadsorbed Oot. To better understand the strong influence of the adsorption temperature and the interplay between coadsorbed species, we conducted DFT calculations and high-resolution STM measurements. Two distinct adsorbate configurations, Had-Oot and Oot-Had-Oot, are identified by STM. Mechanisms and molecular models for H-2 dissociation and Had diffusion on O-rich RuO2(110) are proposed.",

keywords = "SCANNING-TUNNELING-MICROSCOPY; SURFACE-CHEMISTRY; RUTHENIUM DIOXIDE, RuO2(110), PHOTOCATALYSIS, HYDROGEN, OXYGEN, water formation, OXIDE SURFACE",

author = "Yinying Wei and Umberto Martinez and Lutz Lammich and Flemming Besenbacher and Stefan Wendt",

year = "2014",

month = nov,

doi = "10.1021/jp509510j",

language = "English",

volume = "118",

pages = " 27989--27997",

journal = "The Journal of Physical Chemistry Part C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "48",

}

Atomic-Scale View on the H₂O Formation Reaction from H₂ on O-Rich RuO₂(110). / Wei, Yinying; Martinez, Umberto; Lammich, Lutz et al.
In: The Journal of Physical Chemistry Part C, Vol. 118, No. 48, 11.2014, p. 27989-27997.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

TY - JOUR

T1 - Atomic-Scale View on the H2O Formation Reaction from H2 on O-Rich RuO2(110)

AU - Wei, Yinying

AU - Martinez, Umberto

AU - Lammich, Lutz

AU - Besenbacher, Flemming

AU - Wendt, Stefan

PY - 2014/11

Y1 - 2014/11

N2 - The H2O formation reaction from H-2 on O-rich RuO2(110) was studied by temperature-programmed desorption and reaction (TPD/TPR) and scanning tunneling microscopy (STM) measurements and density functional theory (DFT) calculations. On the one hand, following H-2 adsorption at 270 K, our TPD/TPR measurements reveal that the on-top O species (Oot) enhances the sticking probability of H-2, thus facilitating the H-2 adsorption and dissociation on O-rich RuO2(110). On the other hand, for low H-2 adsorption temperature (170 K), the limited mobility of Had species hinders H-2 adsorption at a high coverage of preadsorbed Oot. To better understand the strong influence of the adsorption temperature and the interplay between coadsorbed species, we conducted DFT calculations and high-resolution STM measurements. Two distinct adsorbate configurations, Had-Oot and Oot-Had-Oot, are identified by STM. Mechanisms and molecular models for H-2 dissociation and Had diffusion on O-rich RuO2(110) are proposed.

AB - The H2O formation reaction from H-2 on O-rich RuO2(110) was studied by temperature-programmed desorption and reaction (TPD/TPR) and scanning tunneling microscopy (STM) measurements and density functional theory (DFT) calculations. On the one hand, following H-2 adsorption at 270 K, our TPD/TPR measurements reveal that the on-top O species (Oot) enhances the sticking probability of H-2, thus facilitating the H-2 adsorption and dissociation on O-rich RuO2(110). On the other hand, for low H-2 adsorption temperature (170 K), the limited mobility of Had species hinders H-2 adsorption at a high coverage of preadsorbed Oot. To better understand the strong influence of the adsorption temperature and the interplay between coadsorbed species, we conducted DFT calculations and high-resolution STM measurements. Two distinct adsorbate configurations, Had-Oot and Oot-Had-Oot, are identified by STM. Mechanisms and molecular models for H-2 dissociation and Had diffusion on O-rich RuO2(110) are proposed.

KW - SCANNING-TUNNELING-MICROSCOPY; SURFACE-CHEMISTRY; RUTHENIUM DIOXIDE

KW - RuO2(110)

KW - PHOTOCATALYSIS

KW - HYDROGEN

KW - OXYGEN

KW - water formation

KW - OXIDE SURFACE

U2 - 10.1021/jp509510j

DO - 10.1021/jp509510j

M3 - Journal article

SN - 1932-7447

VL - 118

SP - 27989

EP - 27997

JO - The Journal of Physical Chemistry Part C

JF - The Journal of Physical Chemistry Part C

IS - 48

ER -