Direct metal substitution of electropolymerized ferriprotoporphyrin: A simple electrode-modification process for developing electrocatalytic materials

Jason Alan Bennett, Karissa L. Sterling, James E. Pander

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A simple approach for expanding metalloporphyrins as electrocatalytic materials is introduced. This new method involves the direct electropolymerization of an electrically conducting layer of ferriprotoporphyrin followed by a metal-substitution reaction executed by soaking the electrode in an aqueous metal-salt solution. This process exchanges the iron center of the surface-bound protoporphyrin with the metal ion of the salt solution. X-ray photoelectron spectroscopy and electrochemical methods confirm that this new metal is incorporated into the surface-bound porphyrin structure and alters the electrochemical properties of the electrode. This simple electrode modification process may expand the use of metalloporphyrins for electrocatalytic applications.

Original languageEnglish (US)
JournalECS Electrochemistry Letters
Volume2
Issue number10
DOIs
StatePublished - Jul 26 2013

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Hemin
Metalloporphyrins
Substitution reactions
Metals
Electrodes
Salts
Electropolymerization
Porphyrins
Electrochemical properties
Metal ions
Ion exchange
Iron
X ray photoelectron spectroscopy

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Electrochemistry
  • Materials Chemistry

Cite this

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AB - A simple approach for expanding metalloporphyrins as electrocatalytic materials is introduced. This new method involves the direct electropolymerization of an electrically conducting layer of ferriprotoporphyrin followed by a metal-substitution reaction executed by soaking the electrode in an aqueous metal-salt solution. This process exchanges the iron center of the surface-bound protoporphyrin with the metal ion of the salt solution. X-ray photoelectron spectroscopy and electrochemical methods confirm that this new metal is incorporated into the surface-bound porphyrin structure and alters the electrochemical properties of the electrode. This simple electrode modification process may expand the use of metalloporphyrins for electrocatalytic applications.

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