Copper peroxide
Copper peroxide is an inorganic compound with the formula CuO2. It is an oxide of copper(II), with the two oxygen atoms as a peroxide unit. It appears as a dark olive green solid or similarly colored suspension and is unstable, decomposing to dioxygen and other copper oxides.
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| Properties | |
| CuO2 | |
| Molar mass | 95.945 g/mol |
| Appearance | dark olive-green |
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Related compounds |
Copper(IV) oxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation
Copper peroxide is prepared by the reaction of cold solutions of Schweizer's reagent—a source of copper(II)—and hydrogen peroxide, the former prepared from copper(II) hydroxide and dilute ammonia solution.[1] The Schweizer's reagent used must not contain excess ammonia.[1] Copper peroxide may also be produced by the reaction of an ice-cold solution of hydrogen peroxide with a suspension of copper hydroxide. It may also form from the very slow reaction of finely divided cupric oxide with cold hydrogen peroxide.[2]
Properties
When wet, copper peroxide decomposes[3] at temperatures above 6 °C; it "is far more stable when dry."[2]
References
- The collected works of Sir Humphry Davy: Discourses delivered before the Royal society. Elements of agricultural chemistry, pt. I. The Chemical Society (Great Britain). 1894. p. 32.
- Krüss, Gerhard (1884). "Einige Beobachtungen über die höheren Sauerstoffverbindungen des Kupfers" (abstract). Ber. 17 (2): 2593–2597. doi:10.1002/cber.188401702186.
- Electrical World, Volume 39. 1902. p. 997.