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A Supramolecular Porous Organic Cage Platform Promotes Electrochemical Hydrogen Evolution from Water Catalyzed by Cobalt Porphyrins
release_eirjxqgv7zf5ve2z2grvyig2ii
by
Peter T. Smith,
Bahiru Punja Benke,
Lun An,
Younghoon Kim,
Kimoon Kim,
Christopher Chang
Released
as a post
by American Chemical Society (ACS).
2021
Abstract
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 5-fold
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.
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