The electrolytic preparation method of hydrogen peroxide is clear enough.
1.Turning ammonium hydrogen sulfate (NH4HSO4) to ammonium persulfate [(NH4)2S2O8],by electrolyze the 1:4 mixed solution of sulfuric acid (H2SO4) and ammonium hydrogen sulfate.
2NH4HSO4==(NH4)2S2O8+H2
2.After that, ammonium persulfate need to pour into water.
(NH4)2S2O8+2H2O==2NH4HSO4+H2O2
3.Distilling H2O2 out by vacuum distillation.The NH4HSO4 can be recycled.
There are many papers which talk about this method in China.I also found this reaction pathway in the university chemistry textbook.But I can not get that book immediately,so I will check it tomorrow,