Reduction chemistry of platinum group metal perovskites

John B. Wiley; Kenneth R. Poeppelmeier

doi:10.1016/0025-5408(91)90127-8

Reduction chemistry of platinum group metal perovskites

John B. Wiley, Kenneth R. Poeppelmeier

Northwestern University

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

17 Citations (Scopus)

Abstract

The reduction chemistry of the perovskite and perovskite-related compounds, CaRuO₃, SrRuO₃, BaRuO₃, SrIrO₃, and BaIrO₃, was examined. Samples were reduced at low temperatures (≤ 600°C) by direct reduction with hydrogen gas and by a method that utilized zirconium metal as an oxygen getter. No evidence for oxygen deficient perovskites was observed. In almost all cases, the mixed metal oxide was reduced to form the zero valent platinum group metal and the binary oxide or hydroxide (AO or A(OH)₂). One exception was seen in the reduction of SrIrO₃ via the getter method where the intermediate Sr₄IrO₆ was found.

Original language	English
Pages (from-to)	1201-1210
Number of pages	10
Journal	Materials Research Bulletin
Volume	26
Issue number	11
DOIs	https://doi.org/10.1016/0025-5408(91)90127-8
Publication status	Published - Nov 1991

ASJC Scopus subject areas

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

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title = "Reduction chemistry of platinum group metal perovskites",

abstract = "The reduction chemistry of the perovskite and perovskite-related compounds, CaRuO3, SrRuO3, BaRuO3, SrIrO3, and BaIrO3, was examined. Samples were reduced at low temperatures (≤ 600°C) by direct reduction with hydrogen gas and by a method that utilized zirconium metal as an oxygen getter. No evidence for oxygen deficient perovskites was observed. In almost all cases, the mixed metal oxide was reduced to form the zero valent platinum group metal and the binary oxide or hydroxide (AO or A(OH)2). One exception was seen in the reduction of SrIrO3 via the getter method where the intermediate Sr4IrO6 was found.",

author = "Wiley, {John B.} and Poeppelmeier, {Kenneth R.}",

note = "Funding Information: This work was supported by the National Science Foundation, Solid State Chemistry Grant DMR 8610659 (J.B.W.), the Science and Technology Center for Superconductivity, Grant DMR 8809854, and the Northwestern University Materials Research Center through support of the X-ray diffraction facility, Grant DMR 8520280 .",

year = "1991",

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doi = "10.1016/0025-5408(91)90127-8",

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AU - Wiley, John B.

AU - Poeppelmeier, Kenneth R.

N1 - Funding Information: This work was supported by the National Science Foundation, Solid State Chemistry Grant DMR 8610659 (J.B.W.), the Science and Technology Center for Superconductivity, Grant DMR 8809854, and the Northwestern University Materials Research Center through support of the X-ray diffraction facility, Grant DMR 8520280 .

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N2 - The reduction chemistry of the perovskite and perovskite-related compounds, CaRuO3, SrRuO3, BaRuO3, SrIrO3, and BaIrO3, was examined. Samples were reduced at low temperatures (≤ 600°C) by direct reduction with hydrogen gas and by a method that utilized zirconium metal as an oxygen getter. No evidence for oxygen deficient perovskites was observed. In almost all cases, the mixed metal oxide was reduced to form the zero valent platinum group metal and the binary oxide or hydroxide (AO or A(OH)2). One exception was seen in the reduction of SrIrO3 via the getter method where the intermediate Sr4IrO6 was found.

AB - The reduction chemistry of the perovskite and perovskite-related compounds, CaRuO3, SrRuO3, BaRuO3, SrIrO3, and BaIrO3, was examined. Samples were reduced at low temperatures (≤ 600°C) by direct reduction with hydrogen gas and by a method that utilized zirconium metal as an oxygen getter. No evidence for oxygen deficient perovskites was observed. In almost all cases, the mixed metal oxide was reduced to form the zero valent platinum group metal and the binary oxide or hydroxide (AO or A(OH)2). One exception was seen in the reduction of SrIrO3 via the getter method where the intermediate Sr4IrO6 was found.

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