Nickel-Oxide-Modified SrTiO3(110)-(4 x 1) Surfaces and Their Interaction with Water

Stefan Gerhold; Michele Riva; Zhiming Wang; Roland Bliem; Margareta Wagner; Jacek Osiecki; Karina Schulte; Michael Schmid; Ulrike Diebold

doi:10.1021/acs.jpcc.5b06144

Nickel-Oxide-Modified SrTiO3(110)-(4 x 1) Surfaces and Their Interaction with Water

Stefan Gerhold, Michele Riva, Zhiming Wang, Roland Bliem, Margareta Wagner, Jacek Osiecki, Karina Schulte, Michael Schmid, Ulrike Diebold

MAX IV Laboratory

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Abstract

Nickel oxide (NiO), deposited onto the strontium titanate (SrTiO3) (110)-(4 X 1) surface, was studied using photoemission spectroscopy (PES), X-ray absorption near edge structure (XANES), and low-energy He+ ion scattering (LEIS), as well as scanning tunneling microscopy (STM). The main motivation for studying this system comes from the prominent role it plays in photocatalysis. The (4 X 1) reconstructed SrTiO3(110) surface was previously found to be remarkably inert toward water adsorption under ultrahigh-vacuum conditions. Nickel oxide grows on this surface as patches without any apparent ordered structure. PES and LEIS reveal an upward band bending, a reduction of the band gap, and reactivity toward water adsorption upon deposition of NiO. Spectroscopic results are discussed with respect to the enhanced reactivity toward water of the NiO-loaded surface.

Original language	English
Pages (from-to)	20481-20487
Journal	Journal of Physical Chemistry C
Volume	119
Issue number	35
DOIs	https://doi.org/10.1021/acs.jpcc.5b06144
Publication status	Published - 2015

Subject classification (UKÄ)

Physical Chemistry

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10.1021/acs.jpcc.5b06144

Cite this

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title = "Nickel-Oxide-Modified SrTiO3(110)-(4 x 1) Surfaces and Their Interaction with Water",

abstract = "Nickel oxide (NiO), deposited onto the strontium titanate (SrTiO3) (110)-(4 X 1) surface, was studied using photoemission spectroscopy (PES), X-ray absorption near edge structure (XANES), and low-energy He+ ion scattering (LEIS), as well as scanning tunneling microscopy (STM). The main motivation for studying this system comes from the prominent role it plays in photocatalysis. The (4 X 1) reconstructed SrTiO3(110) surface was previously found to be remarkably inert toward water adsorption under ultrahigh-vacuum conditions. Nickel oxide grows on this surface as patches without any apparent ordered structure. PES and LEIS reveal an upward band bending, a reduction of the band gap, and reactivity toward water adsorption upon deposition of NiO. Spectroscopic results are discussed with respect to the enhanced reactivity toward water of the NiO-loaded surface.",

author = "Stefan Gerhold and Michele Riva and Zhiming Wang and Roland Bliem and Margareta Wagner and Jacek Osiecki and Karina Schulte and Michael Schmid and Ulrike Diebold",

year = "2015",

doi = "10.1021/acs.jpcc.5b06144",

language = "English",

volume = "119",

pages = "20481--20487",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "The American Chemical Society (ACS)",

number = "35",

}

TY - JOUR

T1 - Nickel-Oxide-Modified SrTiO3(110)-(4 x 1) Surfaces and Their Interaction with Water

AU - Gerhold, Stefan

AU - Riva, Michele

AU - Wang, Zhiming

AU - Bliem, Roland

AU - Wagner, Margareta

AU - Osiecki, Jacek

AU - Schulte, Karina

AU - Schmid, Michael

AU - Diebold, Ulrike

PY - 2015

Y1 - 2015

N2 - Nickel oxide (NiO), deposited onto the strontium titanate (SrTiO3) (110)-(4 X 1) surface, was studied using photoemission spectroscopy (PES), X-ray absorption near edge structure (XANES), and low-energy He+ ion scattering (LEIS), as well as scanning tunneling microscopy (STM). The main motivation for studying this system comes from the prominent role it plays in photocatalysis. The (4 X 1) reconstructed SrTiO3(110) surface was previously found to be remarkably inert toward water adsorption under ultrahigh-vacuum conditions. Nickel oxide grows on this surface as patches without any apparent ordered structure. PES and LEIS reveal an upward band bending, a reduction of the band gap, and reactivity toward water adsorption upon deposition of NiO. Spectroscopic results are discussed with respect to the enhanced reactivity toward water of the NiO-loaded surface.

AB - Nickel oxide (NiO), deposited onto the strontium titanate (SrTiO3) (110)-(4 X 1) surface, was studied using photoemission spectroscopy (PES), X-ray absorption near edge structure (XANES), and low-energy He+ ion scattering (LEIS), as well as scanning tunneling microscopy (STM). The main motivation for studying this system comes from the prominent role it plays in photocatalysis. The (4 X 1) reconstructed SrTiO3(110) surface was previously found to be remarkably inert toward water adsorption under ultrahigh-vacuum conditions. Nickel oxide grows on this surface as patches without any apparent ordered structure. PES and LEIS reveal an upward band bending, a reduction of the band gap, and reactivity toward water adsorption upon deposition of NiO. Spectroscopic results are discussed with respect to the enhanced reactivity toward water of the NiO-loaded surface.

U2 - 10.1021/acs.jpcc.5b06144

DO - 10.1021/acs.jpcc.5b06144

M3 - Article

C2 - 26617682

SN - 1932-7447

VL - 119

SP - 20481

EP - 20487

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 35

ER -

Nickel-Oxide-Modified SrTiO3(110)-(4 x 1) Surfaces and Their Interaction with Water

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