Does the tinned copper strip and aluminum react with an electrochemical reaction?
The main reason for the Seebeck effect in semiconductors is the diffusion of carriers at the hot end to the cold end. For example, the P type semiconductor, due to the higher concentration at the hot end of the hole, hole is from high temperature to low temperature end end of diffusion; in open conditions, the formation of the space charge on both ends of the P type semiconductor (hot end with a positive charge, the cold end of a negative charge), and the electric field in the semiconductor; when the drift diffusion effect and electric field offset, which reaches a steady state, at both ends of the semiconductor appeared due to electromotive force caused by temperature gradient.
But when there are two different conductors or semiconductors A and B form a loop, its two ends are connected with each other, as long as two nodes in different temperature, end temperature of T, known as the work end or the hot end, the other end temperature of T0, called the free end (or reference end) or cold end. The road will produce a back electromotive force, the electric potential of the conductor and the direction and size of materials and two point temperature. This phenomenon is called "thermoelectric effect", and the loop composed of two conductors is called "thermocouple". These two kinds of conductors are called "thermoelectric poles", and electromotive force is called thermoelectric electromotive force". But this has nothing to do with the chemical reaction, but the Sebek (Seebeck) effect, also known as the first thermoelectric effect.
If you add water or any other electrolyte, you can. Put a metal dry even burnt only into alloy chemical reaction does not occur.
