。NH,OH:较强还原剂（不引起污染） NH2OH+AgBr→Ag+HBr+H2O+N2(或N2O) N2十5H+十4e=N2H5pA°=-0.23V N2+2H++2H2O+2e=2NH2OH0a°三-1.87V N2+4H0+4e=N2H4+4OHpB°=-1.51V N2+4H20+2e =2NH2OH+20HT 0B°=-3.04V⚫ NH2OH：较强还原剂（不引起污染） NH2OH+AgBr→Ag+HBr+H2O+N2 (或N2O) N2＋5H ＋ ＋4e ＝N2H5 ＋ A ＝-0.23V N2＋2H ＋ ＋2H2O＋2e ＝2NH2OH A ＝-1.87V N2＋4H2O ＋4e ＝N2H4 ＋4OH－ B ＝-1.51V N2＋4H2O＋2e ＝2NH2OH＋2OH－ B ＝-3.04V