Decomposition behavior of Ti-doped NaAlH4 studied using X-ray absorption spectroscopy at the titanium K-edge

E. Bruster; T. A. Dobbins; R. Tittsworth; D. Anton

Decomposition behavior of Ti-doped NaAlH₄ studied using X-ray absorption spectroscopy at the titanium K-edge

E. Bruster, T. A. Dobbins, R. Tittsworth, D. Anton

Research output: Contribution to journal › Conference article › peer-review

Abstract

The local bonding environment of Ti³⁺-dopant atoms in NaAlH ₄ after decomposition to release H₂ has been studied using x-ray absorption fine structure (XAFS). The titanium K-edge spectra from doped hydride samples and the standard materials TiCl₃ and TiO₂ were collected in ambient atmosphere at the synchrotron source at the Center for Advanced Microstructures and Devices (CAMD). Titanium valence states present in the spectra collected from Ti-doped NaAlH₄ after decomposition in air are Ti³⁺ and Ti⁴⁺. The Ti³⁺ is attributed to unreacted TiCl₃. The Ti⁴⁺ present in the sample is attributed to TiO₂ occurring after air oxidation. Coupled with studies of the kinetics of hydrogen desorption reactions, examination of dopant ion valence states after entry into the lattice may lead to better understanding of the interrelationship between lattice doping and desorption kinetics.

Original language	American English
Article number	N3.4
Pages (from-to)	47-52
Number of pages	6
Journal	Materials Research Society Symposium Proceedings
Volume	837
State	Published - Dec 20 2005
Externally published	Yes
Event	2004 Materials Research Society Fall Meeting - Boston, MA, United States Duration: Dec 1 2004 → Dec 2 2004

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Cite this

@article{b7e7cf69d29740f2bafa1b1590d039aa,

title = "Decomposition behavior of Ti-doped NaAlH4 studied using X-ray absorption spectroscopy at the titanium K-edge",

abstract = "The local bonding environment of Ti3+-dopant atoms in NaAlH 4 after decomposition to release H2 has been studied using x-ray absorption fine structure (XAFS). The titanium K-edge spectra from doped hydride samples and the standard materials TiCl3 and TiO2 were collected in ambient atmosphere at the synchrotron source at the Center for Advanced Microstructures and Devices (CAMD). Titanium valence states present in the spectra collected from Ti-doped NaAlH4 after decomposition in air are Ti3+ and Ti4+. The Ti3+ is attributed to unreacted TiCl3. The Ti4+ present in the sample is attributed to TiO2 occurring after air oxidation. Coupled with studies of the kinetics of hydrogen desorption reactions, examination of dopant ion valence states after entry into the lattice may lead to better understanding of the interrelationship between lattice doping and desorption kinetics.",

author = "E. Bruster and Dobbins, {T. A.} and R. Tittsworth and D. Anton",

year = "2005",

month = dec,

day = "20",

language = "American English",

volume = "837",

pages = "47--52",

journal = "Materials Research Society Symposium Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

note = "2004 Materials Research Society Fall Meeting ; Conference date: 01-12-2004 Through 02-12-2004",

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TY - JOUR

T1 - Decomposition behavior of Ti-doped NaAlH4 studied using X-ray absorption spectroscopy at the titanium K-edge

AU - Bruster, E.

AU - Dobbins, T. A.

AU - Tittsworth, R.

AU - Anton, D.

PY - 2005/12/20

Y1 - 2005/12/20

N2 - The local bonding environment of Ti3+-dopant atoms in NaAlH 4 after decomposition to release H2 has been studied using x-ray absorption fine structure (XAFS). The titanium K-edge spectra from doped hydride samples and the standard materials TiCl3 and TiO2 were collected in ambient atmosphere at the synchrotron source at the Center for Advanced Microstructures and Devices (CAMD). Titanium valence states present in the spectra collected from Ti-doped NaAlH4 after decomposition in air are Ti3+ and Ti4+. The Ti3+ is attributed to unreacted TiCl3. The Ti4+ present in the sample is attributed to TiO2 occurring after air oxidation. Coupled with studies of the kinetics of hydrogen desorption reactions, examination of dopant ion valence states after entry into the lattice may lead to better understanding of the interrelationship between lattice doping and desorption kinetics.

AB - The local bonding environment of Ti3+-dopant atoms in NaAlH 4 after decomposition to release H2 has been studied using x-ray absorption fine structure (XAFS). The titanium K-edge spectra from doped hydride samples and the standard materials TiCl3 and TiO2 were collected in ambient atmosphere at the synchrotron source at the Center for Advanced Microstructures and Devices (CAMD). Titanium valence states present in the spectra collected from Ti-doped NaAlH4 after decomposition in air are Ti3+ and Ti4+. The Ti3+ is attributed to unreacted TiCl3. The Ti4+ present in the sample is attributed to TiO2 occurring after air oxidation. Coupled with studies of the kinetics of hydrogen desorption reactions, examination of dopant ion valence states after entry into the lattice may lead to better understanding of the interrelationship between lattice doping and desorption kinetics.

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M3 - Conference article

SN - 0272-9172

VL - 837

SP - 47

EP - 52

JO - Materials Research Society Symposium Proceedings

JF - Materials Research Society Symposium Proceedings

M1 - N3.4

T2 - 2004 Materials Research Society Fall Meeting

Y2 - 1 December 2004 through 2 December 2004

ER -

Decomposition behavior of Ti-doped NaAlH₄ studied using X-ray absorption spectroscopy at the titanium K-edge

Abstract

ASJC Scopus subject areas

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