Local structure of chromium incorporated into electrodeposited nickel hydroxide films

Mahalingam Balasubramanian; Carlos Melendres

doi:10.1107/S0909049599000941

Local structure of chromium incorporated into electrodeposited nickel hydroxide films

Mahalingam Balasubramanian
, Carlos Melendres

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

4 Scopus citations

Abstract

We have utilized X-ray Absorption Fine Structure (XAFS) spectroscopy to investigate the local structure of Cr (III) and Cr (VI) ions incorporated into α-Ni(OH)₂ films. The films were prepared by cathodic co-deposition of Cr and Ni at a constant current from aqueous solutions of nickel nitrate, chromium nitrate and potassium chromate. XAFS measurements show that in films formed from 0.1 M Ni(NO₃)₂ + 0.0005 M Cr(NO₃)₃, Cr (III) is incorporated into the Ni lattice sites of α-Ni(OH)₂. In contrast, co-deposition from a 0.1 M Ni(NO₃)₂ + 0.001 M K₂CrO₄ solution results in Cr (VI) occupying the interlamellar sites of the brucite structure.

Original language	English
Pages (from-to)	594-595
Number of pages	2
Journal	Journal of Synchrotron Radiation
Volume	6
Issue number	3
DOIs	https://doi.org/10.1107/S0909049599000941
State	Published - May 1 1999
Externally published	Yes

Keywords

Chemical speciation
Hydrous nickel oxides
Oxide films

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10.1107/S0909049599000941

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title = "Local structure of chromium incorporated into electrodeposited nickel hydroxide films",

abstract = "We have utilized X-ray Absorption Fine Structure (XAFS) spectroscopy to investigate the local structure of Cr (III) and Cr (VI) ions incorporated into α-Ni(OH)2 films. The films were prepared by cathodic co-deposition of Cr and Ni at a constant current from aqueous solutions of nickel nitrate, chromium nitrate and potassium chromate. XAFS measurements show that in films formed from 0.1 M Ni(NO3)2 + 0.0005 M Cr(NO3)3, Cr (III) is incorporated into the Ni lattice sites of α-Ni(OH)2. In contrast, co-deposition from a 0.1 M Ni(NO3)2 + 0.001 M K2CrO4 solution results in Cr (VI) occupying the interlamellar sites of the brucite structure.",

keywords = "Chemical speciation, Hydrous nickel oxides, Oxide films",

author = "Mahalingam Balasubramanian and Carlos Melendres",

year = "1999",

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doi = "10.1107/S0909049599000941",

language = "English",

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publisher = "International Union of Crystallography",

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TY - JOUR

T1 - Local structure of chromium incorporated into electrodeposited nickel hydroxide films

AU - Balasubramanian, Mahalingam

AU - Melendres, Carlos

PY - 1999/5/1

Y1 - 1999/5/1

N2 - We have utilized X-ray Absorption Fine Structure (XAFS) spectroscopy to investigate the local structure of Cr (III) and Cr (VI) ions incorporated into α-Ni(OH)2 films. The films were prepared by cathodic co-deposition of Cr and Ni at a constant current from aqueous solutions of nickel nitrate, chromium nitrate and potassium chromate. XAFS measurements show that in films formed from 0.1 M Ni(NO3)2 + 0.0005 M Cr(NO3)3, Cr (III) is incorporated into the Ni lattice sites of α-Ni(OH)2. In contrast, co-deposition from a 0.1 M Ni(NO3)2 + 0.001 M K2CrO4 solution results in Cr (VI) occupying the interlamellar sites of the brucite structure.

AB - We have utilized X-ray Absorption Fine Structure (XAFS) spectroscopy to investigate the local structure of Cr (III) and Cr (VI) ions incorporated into α-Ni(OH)2 films. The films were prepared by cathodic co-deposition of Cr and Ni at a constant current from aqueous solutions of nickel nitrate, chromium nitrate and potassium chromate. XAFS measurements show that in films formed from 0.1 M Ni(NO3)2 + 0.0005 M Cr(NO3)3, Cr (III) is incorporated into the Ni lattice sites of α-Ni(OH)2. In contrast, co-deposition from a 0.1 M Ni(NO3)2 + 0.001 M K2CrO4 solution results in Cr (VI) occupying the interlamellar sites of the brucite structure.

KW - Chemical speciation

KW - Hydrous nickel oxides

KW - Oxide films

UR - https://www.scopus.com/pages/publications/0033449068

U2 - 10.1107/S0909049599000941

DO - 10.1107/S0909049599000941

M3 - Article

AN - SCOPUS:0033449068

SN - 0909-0495

VL - 6

SP - 594

EP - 595

JO - Journal of Synchrotron Radiation

JF - Journal of Synchrotron Radiation

IS - 3

ER -

Local structure of chromium incorporated into electrodeposited nickel hydroxide films

Abstract

Keywords

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