You can find some information from the following:

https://www.chem.fsu.edu/~shatruk/docs/Solvent-CV-windows.pdf

At high current density it will form hydroxy-tetrahydrofuran, butyrolactone and succinic acid. The decomposition of THF depends on nature of co-solvent (acidic medium) or electrode materials used in the system. 

Dr. Senthilnathan 

Thanks Dr. Senthilnathan Jaganathan.. for your answer. However, my aim was to get some idea about working potential range of THF as a nonaqueous electrolyte. So that I can choose the correct potential window

Scan it and see!