When aqueous sodium chloride solution is electrolysed

When aqueous solution of NaCl is electrolysed, there is a competition between the following reductions reactions at cathode                    Na++e−⟶Na;Ecell∘=−2.71VH++e−⟶12H2;Ecell∘=0.00VThe reaction with higher value of Eo is preferred and therefore, the second reaction occurs at cathode, i.e. H+ is reduced instead of Na+ .