fig6

Figure 6. The schematic diagram of (A) well-mixed metals, including Zn(II), Co(II), Cd(II)^[156], and Fe(II)^[212] [Fe(II) is added with solvent-free method]; (B) secondary metals, including Mn(II)^[213], Fe(II)^[164], Fe(III)^[214], Ni(II)^[215], Cu(II)^[215], B(III)^[216] and so on [Fe(II) is added with room temperature stirring method]; (C) weak metals, including Ag(I)^[165], Pt(II)/(IV)^[217], Ce(III)/(IV)^[166], and so on; (D) integrate compositional exchange of specific metals such as Mo^[196], W^[196], Pd^[201] and Fe^[66].