Oxidation states of molybdenum in oxide films formed in sulphuric acid and sodium hydroxide

I. A. Okonkwo; J. Doff; A. Baron-Wiecheć; G. Jones; E. V. Koroleva; P. Skeldon; G. E. Thompson

doi:10.1016/j.tsf.2012.05.031

Oxidation states of molybdenum in oxide films formed in sulphuric acid and sodium hydroxide

I. A. Okonkwo, J. Doff, A. Baron-Wiecheć, G. Jones, E. V. Koroleva, P. Skeldon^*, G. E. Thompson

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

X-ray photoelectron spectroscopy is used to investigate the oxidation states of molybdenum in thin films formed potentiostatically, over a range of potentials, in either 1 mol dm ^{- 3} H ₂SO ₄ or 10 mol dm ^{- 3} NaOH at 20°C. Mo 3d spectra suggested that MoO ₂ and Mo(OH) ₂ were the main components of the films, with smaller amounts of MoO ₃ and possibly Mo ₂O ₅. O 1s spectra indicated the presence of oxygen as oxide and hydroxide species and as bound water. Ion beam analysis revealed the formation of thin films at all potentials, with significant losses of oxidized molybdenum to the electrolyte.

Original language	English
Pages (from-to)	6318-6327
Number of pages	10
Journal	Thin Solid Films
Volume	520
Issue number	19
DOIs	https://doi.org/10.1016/j.tsf.2012.05.031
State	Published - 31 Jul 2012
Externally published	Yes

Keywords

Molybdenum
Nuclear reaction analysis
Oxidation state
Oxides
Rutherford backscattering spectroscopy
Sodium hydroxide
Sulphuric acid
X-ray photoelectron spectroscopy

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10.1016/j.tsf.2012.05.031

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title = "Oxidation states of molybdenum in oxide films formed in sulphuric acid and sodium hydroxide",

abstract = "X-ray photoelectron spectroscopy is used to investigate the oxidation states of molybdenum in thin films formed potentiostatically, over a range of potentials, in either 1 mol dm - 3 H 2SO 4 or 10 mol dm - 3 NaOH at 20°C. Mo 3d spectra suggested that MoO 2 and Mo(OH) 2 were the main components of the films, with smaller amounts of MoO 3 and possibly Mo 2O 5. O 1s spectra indicated the presence of oxygen as oxide and hydroxide species and as bound water. Ion beam analysis revealed the formation of thin films at all potentials, with significant losses of oxidized molybdenum to the electrolyte.",

keywords = "Molybdenum, Nuclear reaction analysis, Oxidation state, Oxides, Rutherford backscattering spectroscopy, Sodium hydroxide, Sulphuric acid, X-ray photoelectron spectroscopy",

author = "Okonkwo, {I. A.} and J. Doff and A. Baron-Wieche{\'c} and G. Jones and Koroleva, {E. V.} and P. Skeldon and Thompson, {G. E.}",

note = "Funding Information: The authors thank Drs. I. Vickridge and E. Briand of the Institut des Nano Sciences de Paris for the assistance with RBS/NRA, and the Engineering and Physical Sciences Research Council (U.K.) for financial support through a Portfolio Award (LATEST2) and a CASE Award to JD.",

year = "2012",

month = jul,

day = "31",

doi = "10.1016/j.tsf.2012.05.031",

language = "英语",

volume = "520",

pages = "6318--6327",

journal = "Thin Solid Films",

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TY - JOUR

T1 - Oxidation states of molybdenum in oxide films formed in sulphuric acid and sodium hydroxide

AU - Okonkwo, I. A.

AU - Doff, J.

AU - Baron-Wiecheć, A.

AU - Jones, G.

AU - Koroleva, E. V.

AU - Skeldon, P.

AU - Thompson, G. E.

N1 - Funding Information: The authors thank Drs. I. Vickridge and E. Briand of the Institut des Nano Sciences de Paris for the assistance with RBS/NRA, and the Engineering and Physical Sciences Research Council (U.K.) for financial support through a Portfolio Award (LATEST2) and a CASE Award to JD.

PY - 2012/7/31

Y1 - 2012/7/31

N2 - X-ray photoelectron spectroscopy is used to investigate the oxidation states of molybdenum in thin films formed potentiostatically, over a range of potentials, in either 1 mol dm - 3 H 2SO 4 or 10 mol dm - 3 NaOH at 20°C. Mo 3d spectra suggested that MoO 2 and Mo(OH) 2 were the main components of the films, with smaller amounts of MoO 3 and possibly Mo 2O 5. O 1s spectra indicated the presence of oxygen as oxide and hydroxide species and as bound water. Ion beam analysis revealed the formation of thin films at all potentials, with significant losses of oxidized molybdenum to the electrolyte.

AB - X-ray photoelectron spectroscopy is used to investigate the oxidation states of molybdenum in thin films formed potentiostatically, over a range of potentials, in either 1 mol dm - 3 H 2SO 4 or 10 mol dm - 3 NaOH at 20°C. Mo 3d spectra suggested that MoO 2 and Mo(OH) 2 were the main components of the films, with smaller amounts of MoO 3 and possibly Mo 2O 5. O 1s spectra indicated the presence of oxygen as oxide and hydroxide species and as bound water. Ion beam analysis revealed the formation of thin films at all potentials, with significant losses of oxidized molybdenum to the electrolyte.

KW - Molybdenum

KW - Nuclear reaction analysis

KW - Oxidation state

KW - Oxides

KW - Rutherford backscattering spectroscopy

KW - Sodium hydroxide

KW - Sulphuric acid

KW - X-ray photoelectron spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=84863595414&partnerID=8YFLogxK

U2 - 10.1016/j.tsf.2012.05.031

DO - 10.1016/j.tsf.2012.05.031

M3 - 文章

AN - SCOPUS:84863595414

SN - 0040-6090

VL - 520

SP - 6318

EP - 6327

JO - Thin Solid Films

JF - Thin Solid Films

IS - 19

ER -

Oxidation states of molybdenum in oxide films formed in sulphuric acid and sodium hydroxide

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Keywords

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