An example-FeS2 J.Am.Chem.S0c.134,13216(2o12) FeS8 Oxygen-doped pyrite(FeS1700.03) (a)400 Total (b) 300 2 200 100 0 (A)- 1.02eV 0 Fe(Fe-S) 2 0.00 Energy(eV) -Fe(Fe-O) 0.0 0.02 S(S-S) R S(S-O) M R CFS ppo ea 1.02 eV Fe-3d PpTT S-3p ppi -2 0 5-s ppo Energy (eV)1.02 eV An example – FeS2 J. Am. Chem. Soc. 134, 13216 (2012) Oxygen-doped pyrite (FeS1.97O0.03)