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Unexpected Effect of Intramolecular Phenolic Group on Electrocatalytic CO 2 Reduction
Author(s) -
Guo Kai,
Li Xialiang,
Lei Haitao,
Zhang Wei,
Cao Rui
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201902034
Subject(s) - trifluoromethanesulfonate , porphyrin , chemistry , electrocatalyst , medicinal chemistry , intramolecular force , chloride , salt (chemistry) , catalysis , group (periodic table) , inorganic chemistry , photochemistry , organic chemistry , electrochemistry , electrode
Iron porphyrin 1 with appending phenolic group was synthesized and examined as electrocatalyst for the carbon dioxide reduction (CO 2 RR). 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 CO 2 RR. 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 CO 2 RR.
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