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Metal and mixed-metal (oxy)-hydroxide ceramic precursor materials prepared by cathodically-induced precipitation using a hydrogen-sorbing palladium electrode
journal contribution
posted on 2007-10-22, 14:28 authored by Roger J. Mortimer, Russell J. Mayes, Sandie DannSandie DannThe electrochemical reduction of several metal and mixed-metal sulfate aqueous
solutions at a palladium electrode has been studied. For magnesium, lanthanum, yttrium
and scandium sulfates, metal (oxy)-hydroxide films are produced by cathodicallyinduced
precipitation of the metal cations, following the local generation of hydroxide
ions at the hydrogen-sorbing cathode. Mixed-metal (oxy)-hydroxide films are prepared
from yttrium/lanthanum and yttrium/scandium sulfate solutions. For mixed
yttrium/indium sulfate solutions, the amorphous yttrium/indium (oxy)-hydroxide films
initially contain indium dendrites. On calcination, a metastable yttrium/indium oxide
phase is observed between 600 – 1000°C, followed by the separation of the indium and
yttrium oxides above 1000°C. No films are accessible from the sulfate solutions of
electropositive metals such as sodium and potassium, where the corresponding metal
oxides and hydroxides are highly soluble. Metals are electrodeposited from separate
sulfate solutions of zinc, nickel and indium, in preference to the cathodically-induced
precipitation of the metal (oxy)-hydroxide.
History
School
- Science
Department
- Chemistry
Citation
MORTIMER, R.J., MAYES, R.J. and DANN, S.E., 2007. Metal and mixed-metal (oxy)-hydroxide ceramic precursor materials prepared by cathodically-induced precipitation using a hydrogen-sorbing palladium electrode. Materials Letters, 61, pp. 5121–5124Publisher
© ElsevierPublication date
2007Notes
This article was published in the journal, Materials letters [© Elsevier] and is available online at: http://www.sciencedirect.com/science/journal/0167577XISSN
0167-577XLanguage
- en