Ee(N2+Ni)=-0.2363V Ee(Pd2+/Pd)=+0.92V Ee(Pt2+Pt)=+1.2V估计值) E(zn2Zn)=-0.762V 机邵学电國图 E(d2Cd)=-0402V E(Hg/Hg)=0.852V 总趋势:从上到下活泼性降低总趋势：从上到下活泼性降低。 ( ) ( ) (Hg /Hg ) 0.852V Cd /Cd 0.402V Zn /Zn 0.762V 2 2 2 = + = − = − + + + E E E E (Ni2+/Ni) =－0.2363V E (Pd2+/Pd) = +0.92V E (Pt2+/Pt) = +1.2V(估计值)