[JakeJ]

This is a lay question. Hydrogen peroxide combined with powdered copper is highly reactive.

As the hydrogen peroxide (h2o2) is broken down to water (h2o) and water (o), and the copper is broken down to smaller particles. Is any other element produced in this reaction, or are the only results water, oxygen and copper?

[JakeJ]

I have the same question about combining hydrogen peroxide and silver. Does the reaction form any other element/chemical?

[Hunter2]

Probably the metals working only as catalyst to destroy the Peroxide. Silver is too noble to react with anything here. If using copper and add additional some sulfuric acid, then the copper will be oxidized and dissolved.