Exploring dicyano-ferriprotoporphyrin as a novel electrocatalytic material for selective H2S gasotransmitter detection

Jason A. Bennett; Christopher D. Wheeler; Karissa L. Sterling; Andrea M. Chiodo

doi:10.1016/j.electacta.2012.10.056

Exploring dicyano-ferriprotoporphyrin as a novel electrocatalytic material for selective H₂S gasotransmitter detection

Jason A. Bennett, Christopher D. Wheeler, Karissa L. Sterling, Andrea M. Chiodo

School of Science (Behrend)

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

8 Scopus citations

Abstract

Dicyano-ferriprotoporphyrin supported on Pt microelectrodes was investigated as a possible electrocatalytic material capable of selectively oxidizing the gasotransmitter H₂S over interfering gasotransmitters CO and NO. The modified microelectrodes were able to detect H₂S concentrations as low as 50 nM at a potential of 0.15 V vs. Ag/AgCl and demonstrated a 100-1000× higher sensitivity toward H₂S than CO and NO, respectively. However, H₂S detection was affected by the presence of CO and NO due, at least in part, to imperfect coverage of the underlying Pt microelectrode by the electrocatalyst. Incomplete CN^- coordination and questionable stability of the porphyrin layer are also discussed as possible causes of CO and NO interference. Work is on-going to alleviate these limitations in order to fully develop the material into a practical electrocatalyst capable of selective H₂S oxidation.

Original language	English (US)
Pages (from-to)	86-93
Number of pages	8
Journal	Electrochimica Acta
Volume	88
DOIs	https://doi.org/10.1016/j.electacta.2012.10.056
State	Published - Jan 15 2013

All Science Journal Classification (ASJC) codes

General Chemical Engineering
Electrochemistry

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10.1016/j.electacta.2012.10.056

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title = "Exploring dicyano-ferriprotoporphyrin as a novel electrocatalytic material for selective H2S gasotransmitter detection",

abstract = "Dicyano-ferriprotoporphyrin supported on Pt microelectrodes was investigated as a possible electrocatalytic material capable of selectively oxidizing the gasotransmitter H2S over interfering gasotransmitters CO and NO. The modified microelectrodes were able to detect H2S concentrations as low as 50 nM at a potential of 0.15 V vs. Ag/AgCl and demonstrated a 100-1000× higher sensitivity toward H2S than CO and NO, respectively. However, H2S detection was affected by the presence of CO and NO due, at least in part, to imperfect coverage of the underlying Pt microelectrode by the electrocatalyst. Incomplete CN- coordination and questionable stability of the porphyrin layer are also discussed as possible causes of CO and NO interference. Work is on-going to alleviate these limitations in order to fully develop the material into a practical electrocatalyst capable of selective H2S oxidation.",

author = "Bennett, {Jason A.} and Wheeler, {Christopher D.} and Sterling, {Karissa L.} and Chiodo, {Andrea M.}",

note = "Funding Information: The authors acknowledge Penn State Erie, The Behrend College as well as an award from Research Corporation for Science Advancement for the financial support for this work. The proof reading of this manuscript by Dr. Amber Hupp at the College of Holy Cross is greatly appreciated. Copyright: Copyright 2013 Elsevier B.V., All rights reserved.",

year = "2013",

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doi = "10.1016/j.electacta.2012.10.056",

language = "English (US)",

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pages = "86--93",

journal = "Electrochimica Acta",

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AU - Bennett, Jason A.

AU - Wheeler, Christopher D.

AU - Sterling, Karissa L.

AU - Chiodo, Andrea M.

N1 - Funding Information: The authors acknowledge Penn State Erie, The Behrend College as well as an award from Research Corporation for Science Advancement for the financial support for this work. The proof reading of this manuscript by Dr. Amber Hupp at the College of Holy Cross is greatly appreciated. Copyright: Copyright 2013 Elsevier B.V., All rights reserved.

PY - 2013/1/15

Y1 - 2013/1/15

N2 - Dicyano-ferriprotoporphyrin supported on Pt microelectrodes was investigated as a possible electrocatalytic material capable of selectively oxidizing the gasotransmitter H2S over interfering gasotransmitters CO and NO. The modified microelectrodes were able to detect H2S concentrations as low as 50 nM at a potential of 0.15 V vs. Ag/AgCl and demonstrated a 100-1000× higher sensitivity toward H2S than CO and NO, respectively. However, H2S detection was affected by the presence of CO and NO due, at least in part, to imperfect coverage of the underlying Pt microelectrode by the electrocatalyst. Incomplete CN- coordination and questionable stability of the porphyrin layer are also discussed as possible causes of CO and NO interference. Work is on-going to alleviate these limitations in order to fully develop the material into a practical electrocatalyst capable of selective H2S oxidation.

AB - Dicyano-ferriprotoporphyrin supported on Pt microelectrodes was investigated as a possible electrocatalytic material capable of selectively oxidizing the gasotransmitter H2S over interfering gasotransmitters CO and NO. The modified microelectrodes were able to detect H2S concentrations as low as 50 nM at a potential of 0.15 V vs. Ag/AgCl and demonstrated a 100-1000× higher sensitivity toward H2S than CO and NO, respectively. However, H2S detection was affected by the presence of CO and NO due, at least in part, to imperfect coverage of the underlying Pt microelectrode by the electrocatalyst. Incomplete CN- coordination and questionable stability of the porphyrin layer are also discussed as possible causes of CO and NO interference. Work is on-going to alleviate these limitations in order to fully develop the material into a practical electrocatalyst capable of selective H2S oxidation.

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JO - Electrochimica Acta

JF - Electrochimica Acta

ER -

Exploring dicyano-ferriprotoporphyrin as a novel electrocatalytic material for selective H₂S gasotransmitter detection

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