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Oxygen Reduction Reaction (ORR) Activity of a Phenol‐Substituted Linear Fe III –Porphyrin Dimer
Author(s) -
Tei Go,
Tamaki Takashi,
Hayashi Takao,
Nakajima Kosuke,
Sakai Akihiro,
Yotsuhashi Satoshi,
Ogawa Takuji
Publication year - 2017
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201700394
Subject(s) - chemistry , porphyrin , dimer , phenol , catalysis , monomer , oxygen , photochemistry , oxygen reduction reaction , inorganic chemistry , medicinal chemistry , polymer chemistry , electrochemistry , organic chemistry , electrode , polymer
We report oxygen reduction reaction (ORR) activity in a phenol‐substituted iron porphyrin dimer used as catalyst. Supported on carbon, Fe III –porphyrin dimer FeDOH /C shows about 60 mV higher onset potential (OP) and about 50 mV higher half‐wave potential (HWP) than those of the unsubstituted monomer ( FeM /C). When these two catalysts are compared with the phenol‐substituted monomer catalyst ( FeMOH /C), the improvement in the OP and HWP values for FeDOH /C with respect to those of FeM /C and FeMOH /C are attributed to its phenol group under acidic conditions and to the proximity of two active iron centers coordinated by four nitrogen ligands.