In this reaction, carbon is oxidised because it gains oxygen. At the same time, copper oxide is reduced because oxygen is removed from it.

oxidation is the loss of electrons reduction is the gain of electrons Balance the half equation for the formation of aluminium during electrolysis: Al 3+ + e-→ Al. The balanced half equation is: ...

This is because the required ensemble of active sites to achieve the maximum reaction ... the peroxide oxidation signal was measured at the ring, which was held at 1.1 V versus the reversible ...

But that electron has to go somewhere, so every oxidation reaction is paired with a reduction reaction, where an electron is added to a second molecule. The problem, says Moeller, is that "that ...