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A Supramolecular Porous Organic Cage Platform Promotes Electrochemical Hydrogen Evolution from Water Catalyzed by Cobalt Porphyrins
Author(s) -
Smith Peter T.,
Benke Bahiru Punja,
An Lun,
Kim Younghoon,
Kim Kimoon,
Chang Christopher J.
Publication year - 2021
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202100331
Subject(s) - tafel equation , cobalt , supramolecular chemistry , catalysis , porphyrin , electrochemistry , porosity , materials science , electrocatalyst , hydrogen bond , chemistry , inorganic chemistry , chemical engineering , photochemistry , crystallography , electrode , organic chemistry , crystal structure , molecule , composite material , engineering
We report a supramolecular porous organic cage platform composed of cobalt porphyrins for catalyzing the electrochemical hydrogen evolution reaction (HER) from water at neutral pH. Owing to its permanent porosity, the supramolecular structure yields a catalyst film with a fivefold increase in the number of electrochemically active cobalt atoms and an improvement in Tafel slope from 170 mV/decade to 119 mV/decade compared to a planar cobalt porphyrin analog, reaching activities over 19,000 turnovers for HER over a 24‐hour period with 100 % Faradaic efficiency.