Effect of some solid polymer electrolyte membranes,Nafion,Gore and Fuma membrane,on the electro-generative hydrogenation behavior of the PEMFC reactor was studied.Nafion membrane has demonstrated much better performance for the electro-generative hydrogenation of organic acids and enols than Gore and Fuma membrane.For Nafion membrane,the thickness and strength both influence the hydrogenation of organic acids and enols.