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

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

doi:https://doi.org/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

Bar-Ilan University

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

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

Keywords

Bromine
Bromine complexing agent
Hydrogen
Platinum

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Energy Engineering and Power Technology
Fuel Technology
Renewable Energy, Sustainability and the Environment

UN SDGs

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

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https://doi.org/10.1016/j.ijhydene.2022.07.037

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@article{0fe8318dd86e45c2bb3e527e472666d6,

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–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.",

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 = "https://doi.org/10.1016/j.ijhydene.2022.07.037",

language = "الإنجليزيّة",

volume = "47",

pages = "31342--31349",

journal = "International Journal of Hydrogen Energy",

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number = "73",

}

TY - JOUR

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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U2 - https://doi.org/10.1016/j.ijhydene.2022.07.037

DO - https://doi.org/10.1016/j.ijhydene.2022.07.037

M3 - مقالة

SN - 0360-3199

VL - 47

SP - 31342

EP - 31349

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

Keywords

All Science Journal Classification (ASJC) codes

UN SDGs

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