The present disclosure provides systems and methods useful in suppressing the formation of metal oxides on an anode during electrowinning of a metal value. For example, a method is disclosed comprising electrowinning a metal value from a metal value-bearing electrolyte solution using an electrowinning system, the electrowinning system comprising an anode, and adding at least one of an acrylamide and a hydrocarbon with an acrylamide functional group to the metal value-bearing electrolyte solution for the suppression of metal oxide deposition on the surface of the anode.