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Iron porphyrin 1 with appending phenolic group was synthesized and examined as electrocatalyst for the carbon dioxide reduction (CO2RR). Unexpectedly, the chloride salt 1‐Cl is much less active as compared… Click to show full abstract
Iron porphyrin 1 with appending phenolic group was synthesized and examined as electrocatalyst for the carbon dioxide reduction (CO2RR). Unexpectedly, the chloride salt 1‐Cl is much less active as compared to iron porphyrin 2‐Cl, the structural analogue lacking the hanging phenolic group. By using the triflate salts, 1‐OTf is three times more active than 1‐Cl, while 2‐OTf displays the same activity as 2‐Cl for CO2RR. The observed trend 1‐OTf>2‐OTf=2‐Cl>1‐Cl indicates that the phenolic group has both positive effect as local proton donating site and unexpected negative effect on electrocatalytic CO2RR.
Journal Title: ChemCatChem
Year Published: 2020
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