Table 1. Catalysis parameters of Fe porphyrin dimers (this work) and other reported molecular CO₂/CO reduction catalysts.

Solvent E0(CO2/CO), V	Catalyst E0cat ,V	kcat, s−1	η, V	logTOF, s−1	logTOF0, s−1	Ref.
DMF/10% H2O −0.69	Fe2DTPFPP, −1.25	1.6 × 104	0.40 − 0.60	1.5 − 3.9, 4.2*	−5.0	This work
DMF/10% H2O − 0.69	Fe2DTF2PP, −1.34	3.7 × 104	0.50 − 0.65	2.0 − 4.3, 4.5*	−6.1	This work
DMF/10% H2O − 0.69	Fe2DTCl2PP, −1.35	4.1 × 103	0.55 − 0.70	1.8 − 3.5, 3.6*	−7.2	This work
DMF/10% H2O − 0.69	Fe2DTPP, −1.40	2.0 × 104	0.60 − 0.75	2.4 − 4.2, 4.3*	−8.1	This work49
DMF/10% H2O − 0.69	Fe2DTMP, −1.60	4.1 × 103	0.70 − 0.85	2.3 − 4.8, 5.8*	−9.6	This work
DMF/10% H2O − 0.69	Fe2TPFPP, −TMP −1.35	7.3 × 105	0.55 − 0.70	2.8 − 4.3, 4.7*	−6.1	This work
DMF/10% H2O − 0.69	FeTPP,  − 1.41	2.1 × 103	0.60 − 1.0	1.4 − 3.1, 3.3*	−8.4	This work
DMF/5% H2O /3M PhOH −0.69	CATa, − 1.35	>5.0 × 106	0.45 − 0.70	1.8 − 3.2, 3.8*	−6.0	22
DMF/5% H2O /3M PhOH −0.69	FCATb, − 1.28	>5.0 × 106	0.40 − 0.70	1.6 − 3.8, 4.0*	−5.5	22
DMF/5% H2O /3M PhOH −0.69	FeTPP, −1.43	3.5 × 104	0.60 − 1.00	2.5 − 4.3, 4.5*	−8.0	20
CH3CN/0.8M CF3CH2OH −0.65	Re(bpy)(py)(CO)3 , −1.30	875.0	NA	2.9*	−8.0	11
CH3CN −0.65	(bbpy)Mn(CO)3 , −1.28	5.0 × 103	NA	3.7*	−7.0	28
CH3CN −0.65	Ru(tpy)(Mebim-py), −1.34	59.0	NA	1.8*	−9.9	12
CH3CN −0.65	Ru(tpy)(bpy) −1.34	7.6	NA	0.9*	−10.8	12
DMF/0.1M HBF4 −0.23	m-(triphos)2Pd2 , −0.76	35.0	NA	1.5*	−7.4	42

^aFe meso-tetra(2,6-dihydroxyphenyl)porphyrin.

^bFe 5,15-di((2,6-dihydroxyphenyl)-10,20-di(pentafluorophenyl)porphyrin.

^*logTOF_max, s⁻¹.