A Supramolecular Porous Organic Cage Platform Promotes Electrochemical Hydrogen Evolution from Water Catalyzed by Cobalt Porphyrins

Peter T. Smith; Bahiru Punja Benke; Lun An; Younghoon Kim; Kimoon Kim; Christopher J. Chang

doi:10.1002/celc.202100331

A Supramolecular Porous Organic Cage Platform Promotes Electrochemical Hydrogen Evolution from Water Catalyzed by Cobalt Porphyrins

Peter T. Smith, Bahiru Punja Benke, Lun An, Younghoon Kim, Kimoon Kim, Christopher J. Chang

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

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 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.

Original language	English (US)
Pages (from-to)	1653-1657
Number of pages	5
Journal	ChemElectroChem
Volume	8
Issue number	9
DOIs	https://doi.org/10.1002/celc.202100331
State	Published - May 3 2021
Externally published	Yes

All Science Journal Classification (ASJC) codes

Catalysis
Electrochemistry

Keywords

electrocatalysis
hydrogen evolution
porous organic cages
porphyrins
supramolecular chemistry

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10.1002/celc.202100331

Cite this

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title = "A Supramolecular Porous Organic Cage Platform Promotes Electrochemical Hydrogen Evolution from Water Catalyzed by Cobalt Porphyrins",

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 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.",

keywords = "electrocatalysis, hydrogen evolution, porous organic cages, porphyrins, supramolecular chemistry",

author = "Smith, {Peter T.} and Benke, {Bahiru Punja} and Lun An and Younghoon Kim and Kimoon Kim and Chang, {Christopher J.}",

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doi = "10.1002/celc.202100331",

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T1 - A Supramolecular Porous Organic Cage Platform Promotes Electrochemical Hydrogen Evolution from Water Catalyzed by Cobalt Porphyrins

AU - Smith, Peter T.

AU - Benke, Bahiru Punja

AU - An, Lun

AU - Kim, Younghoon

AU - Kim, Kimoon

AU - Chang, Christopher J.

PY - 2021/5/3

Y1 - 2021/5/3

N2 - 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.

AB - 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.

KW - electrocatalysis

KW - hydrogen evolution

KW - porous organic cages

KW - porphyrins

KW - supramolecular chemistry

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A Supramolecular Porous Organic Cage Platform Promotes Electrochemical Hydrogen Evolution from Water Catalyzed by Cobalt Porphyrins

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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