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Caption : figure s1. schematic diagram for spin state equilibrium for co3+

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Caption : figure s2. pdos plots as a function of spin states for: a) lscf-6482, b) bscf-6482, c) srcoo3, d) lacoo3 and e) bacoo3. the respective normal probability plot for spin states of the pdos are shown in (a1, a2); (b1, b2); (c1, c2); (d1, d2); (e1, e2).

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Caption : figure s3 computed orbital energy as a function of associated homo & lumo orbitals for: a) lscf-6482, b) bscf-6482, c) srcoo3 and d) srfeo3

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Caption : figure s4.  nyquist plots for the single cells with bscf6482 as the active electrocatalyst at an operating temperature of 750oc (a, b) and 700oc (c, d) as a function of applied potentials (0.4v-1.0v) for a), c) anodic (oer) and b), d) cathodic (orr) bias. 

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Caption : figure s5.  nyquist plots for the single cells with lscf6482 as the active electrocatalyst at an operating temperature of 750oc (a, b) and 700oc (c, d) as a function of applied potentials (0.4v-1.0v) for a), c) anodic (oer) and b), d) cathodic (orr) bias. 

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Caption : figure s6.  impedance response of single cells fabricated using bscf6482 in the temperature range of 700-800oc under anodic potential (+) of 1.0 v (a), 0.6 v(c) and 0.4 v (e) and cathodic potential (-) of 1.0 v (b), 0.6 v (d) and 0.4 v(f). 
the activation energy plot for associated polarizations (ro, rp and rct) for anodic potential (+) of 1.0 v (a1), 0.6 v(c1) and 0.4 v (e1) and cathodic potential (-) of 1.0 v (b1), 0.6 v (d1) and 0.4 v(f1). the corresponding equivalent circuit is shown in g). 

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Caption : figure s7.  impedance response of single cells fabricated using lscf6482 in the temperature range of 700-800oc under anodic potential (+) of 1.0 v (a), 0.6 v(c) and 0.4 v (e) and cathodic potential (-) of 1.0 v (b), 0.6 v (d) and 0.4 v(f). 
the activation energy plot for associated polarizations (ro, rp and rct) for anodic potential (+) of 1.0 v (a1), 0.6 v(c1) and 0.4 v (e1) and cathodic potential (-) of 1.0 v (b1), 0.6 v (d1) and 0.4 v(f1). the corresponding equivalent circuit is shown in g). 
the equivalent circuit fitted composed of an inductor couple with resistors (ohmic contribution and polarization resistance) connected in parallel to the capacitive part of the circuit viz cpe. since, the inductor part is very small, the circuit is simplified with removal of the inductor component as shown in figure s6g and s7g. 

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Caption : fig. s8. a) schematic for mechanistic approach (including thermodynamic and kinetic factors) for auto combustion synthesis and b) preparation steps for solution combustion synthesis of doped srfeo3 system.