Adsorption of bromine complexing agents on platinum electrocatalysts and prevention through polydopamine coatings

Samuel S. Hardisty; Nagaprasad Reddy Samala; Ilya Grinberg; David Zitoun

doi:10.1016/j.ijhydene.2022.07.037

Adsorption of bromine complexing agents on platinum electrocatalysts and prevention through polydopamine coatings

Samuel S. Hardisty
, Nagaprasad Reddy Samala
, Ilya Grinberg
, David Zitoun

Department of Chemistry

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

3 Scopus citations

Abstract

Bromine complexing agents (BCAs) are seen as a promising route to mitigate the potential health and environmental risks of the bromine-based redox-flow batteries, like the hydrogen bromine redox flow battery (H₂–Br₂ RFB). The most studied BCAs are based on the pyridinium anion, which may adsorb and inhibit the Pt catalyst required in the H₂–Br₂ RFB system for the hydrogen reactions. Herein the effect of two BCAs (ethyl-pyridinium bromide and hexyl-pyridinium bromide) on a Pt electrocatalyst are studied, along with a potential methodology to prevent adsorption of the BCA through a polydopamine (PDA) coating. The results show that the pyridinium anion is adsorbed on Pt throughout a large potential range (−0.02 to 1.0 V), reducing the availability of the surface for the adsorption of other species. The PDA coating prevented this adsorption, but itself experiences adsorption of the BCA leading to some reduction in its porosity.

Original language	English
Pages (from-to)	31342-31349
Number of pages	8
Journal	International Journal of Hydrogen Energy
Volume	47
Issue number	73
DOIs	https://doi.org/10.1016/j.ijhydene.2022.07.037
State	Published - 26 Aug 2022

Bibliographical note

Publisher Copyright:
© 2022 Hydrogen Energy Publications LLC

Funding

The authors thank Dr. Peter Fischer, Dr. Ran Elazari and Mr. Michael Kuttinger for fruitful discussions on bromine complexing agents. This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement no. 765289 – Flowcamp.

Funders	Funder number
H2020 Marie Skłodowska-Curie Actions	765289
Horizon 2020

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Bromine
Bromine complexing agent
Hydrogen
Platinum

Access to Document

10.1016/j.ijhydene.2022.07.037

Cite this

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title = "Adsorption of bromine complexing agents on platinum electrocatalysts and prevention through polydopamine coatings",

abstract = "Bromine complexing agents (BCAs) are seen as a promising route to mitigate the potential health and environmental risks of the bromine-based redox-flow batteries, like the hydrogen bromine redox flow battery (H2{\textendash}Br2 RFB). The most studied BCAs are based on the pyridinium anion, which may adsorb and inhibit the Pt catalyst required in the H2{\textendash}Br2 RFB system for the hydrogen reactions. Herein the effect of two BCAs (ethyl-pyridinium bromide and hexyl-pyridinium bromide) on a Pt electrocatalyst are studied, along with a potential methodology to prevent adsorption of the BCA through a polydopamine (PDA) coating. The results show that the pyridinium anion is adsorbed on Pt throughout a large potential range (−0.02 to 1.0 V), reducing the availability of the surface for the adsorption of other species. The PDA coating prevented this adsorption, but itself experiences adsorption of the BCA leading to some reduction in its porosity.",

keywords = "Bromine, Bromine complexing agent, Hydrogen, Platinum",

author = "Hardisty, \{Samuel S.\} and Samala, \{Nagaprasad Reddy\} and Ilya Grinberg and David Zitoun",

note = "Publisher Copyright: {\textcopyright} 2022 Hydrogen Energy Publications LLC",

year = "2022",

month = aug,

day = "26",

doi = "10.1016/j.ijhydene.2022.07.037",

language = "אנגלית",

volume = "47",

pages = "31342--31349",

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T1 - Adsorption of bromine complexing agents on platinum electrocatalysts and prevention through polydopamine coatings

AU - Hardisty, Samuel S.

AU - Samala, Nagaprasad Reddy

AU - Grinberg, Ilya

AU - Zitoun, David

PY - 2022/8/26

Y1 - 2022/8/26

N2 - Bromine complexing agents (BCAs) are seen as a promising route to mitigate the potential health and environmental risks of the bromine-based redox-flow batteries, like the hydrogen bromine redox flow battery (H2–Br2 RFB). The most studied BCAs are based on the pyridinium anion, which may adsorb and inhibit the Pt catalyst required in the H2–Br2 RFB system for the hydrogen reactions. Herein the effect of two BCAs (ethyl-pyridinium bromide and hexyl-pyridinium bromide) on a Pt electrocatalyst are studied, along with a potential methodology to prevent adsorption of the BCA through a polydopamine (PDA) coating. The results show that the pyridinium anion is adsorbed on Pt throughout a large potential range (−0.02 to 1.0 V), reducing the availability of the surface for the adsorption of other species. The PDA coating prevented this adsorption, but itself experiences adsorption of the BCA leading to some reduction in its porosity.

AB - Bromine complexing agents (BCAs) are seen as a promising route to mitigate the potential health and environmental risks of the bromine-based redox-flow batteries, like the hydrogen bromine redox flow battery (H2–Br2 RFB). The most studied BCAs are based on the pyridinium anion, which may adsorb and inhibit the Pt catalyst required in the H2–Br2 RFB system for the hydrogen reactions. Herein the effect of two BCAs (ethyl-pyridinium bromide and hexyl-pyridinium bromide) on a Pt electrocatalyst are studied, along with a potential methodology to prevent adsorption of the BCA through a polydopamine (PDA) coating. The results show that the pyridinium anion is adsorbed on Pt throughout a large potential range (−0.02 to 1.0 V), reducing the availability of the surface for the adsorption of other species. The PDA coating prevented this adsorption, but itself experiences adsorption of the BCA leading to some reduction in its porosity.

KW - Bromine

KW - Bromine complexing agent

KW - Hydrogen

KW - Platinum

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JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 73

ER -

Adsorption of bromine complexing agents on platinum electrocatalysts and prevention through polydopamine coatings

Abstract

Bibliographical note

Funding

UN SDGs

Keywords

Access to Document

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