Identification of Barium Hydroxo-Hydroperoxostannate Precursor for Low-Temperature Formation of Perovskite Barium Stannate

Alexander G. Medvedev, Alexey A. Mikhaylov, Alexander I. Shames, Andrey B. Ilyukhin, Andrei V. Churakov, Dmitry A. Grishanov, Elena A. Mel'nik, Tatiana A. Tripol'skaya, Ovadia Lev*, Petr V. Prikhodchenko*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A breakthrough "superoxide colloidal solution route"for low-temperature synthesis of barium and strontium stannate perovskites and their doped analogues was recently introduced. The synthesis starts from hydrogen peroxide-rich stannate solutions and yields a so-called "crystalline superoxide molecular cluster"that is converted by low temperature (<300 °C) to the respective perovskites. In this paper, the so-called "crystalline superoxide molecular cluster"is identified as a superoxide-free, barium trihydroxo(hydroperoxo)peroxostannate, BaSn(OH)3(OOH)(OO) phase (BHHPS). EPR and Raman spectroscopy studies reveal the absence of superoxide in this crystalline phase. FTIR of the deuterated sample, 119Sn NMR, and elemental analysis uncovered the empirical formula, H4O7SnBa with two peroxides per each tin element. Rietveld refinement of the XRD confirms the BHHPS cubic phase with replacement of the perovskite oxygen atoms by the OH- A nd OOH-ligands and peroxobridging groups.

Original languageAmerican English
Pages (from-to)18358-18365
Number of pages8
JournalInorganic Chemistry
Volume59
Issue number24
DOIs
StatePublished - 21 Dec 2020

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© 2020 American Chemical Society.

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