Why Multiple Metal Centers Matter

| | Keggin POMs | \[XM₁₂O₄₀]ⁿ⁻ (X=P, Si) | Strong acidity, redox activity | Catalysis, battery electrodes | | Prussian Blue | Fe₄\[Fe(CN)₆]₃ | Mixed-valent Fe²⁺/Fe³⁺, ion storage | Batt...