12.1过渡元素通性 E(Ni2*/Ni)=-0.25V E(Pd2+/Pd)=+0.92V E°(Pt2*P)=+1.2V(估计值) E9(Zn2+/Zn)=-0.763V E(Cd2+/Cd=-0.403V E(Hg2+/Hg)=+0.854V 总趋势：从上到下活泼性降低 ( ) ( ) (Pt /Pt) 1.2V( ) Pd /Pd 0.92V N i /Ni 0.25V 2 θ 2 θ 2 θ = + 估计值 = + = − + + + E E E ( ) ( ) (Hg /Hg) 0.854V Cd /Cd 0.403V Zn /Zn 0.763V θ 2 θ 2 θ 2 = + = − = − + + + E E E 总趋势：从上到下活泼性降低 12.1 过渡元素通性