How the reduction potential of an electrode can be decreased?

Explanation

`M^(n+)+n e^(-)toM,E_(M^(n+)//M)=E_(M^(n+)//M)^(@)-(RT)/(nF)"ln"(1)/([M^(n+)])=E_(M^(n+)//M)^(@)+(RT)/(nF)"ln"[M^(n+)]`
thus, electrode potential can be increased either by increasing metal ion concentration, i.e., `[M^(n+)]` or temperature T.