Insights into the reaction pathways of platinum dissolution and oxidation during electrochemical processes

Recent studies have shown the limits of passivity of the platinum electrode. Since it is an important benchmarked electrode for various catalysis reactions and a vital counter electrode, it is essential to understand the mechanism of leaching of the platinum electrode. This report studies the electr...

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Main Authors: Sumit Bawari, Tharangattu N. Narayanan, Jagannath Mondal
Format: Article
Language:English
Published: Elsevier 2023-02-01
Series:Electrochemistry Communications
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S1388248123000140
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author Sumit Bawari
Tharangattu N. Narayanan
Jagannath Mondal
author_facet Sumit Bawari
Tharangattu N. Narayanan
Jagannath Mondal
author_sort Sumit Bawari
collection DOAJ
description Recent studies have shown the limits of passivity of the platinum electrode. Since it is an important benchmarked electrode for various catalysis reactions and a vital counter electrode, it is essential to understand the mechanism of leaching of the platinum electrode. This report studies the electrochemically driven oxidation and leaching of platinum using a combined theoretical and experimental framework. With insights from electrochemistry, surface enhanced Raman spectroscopy, and electrochemically driven reactive MD, different regimes of chemisorption, surface oxidation, and 3D oxide formation are uncovered that directly affect leaching of individual Pt2+(H2O)4 molecules.
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spelling doaj.art-7399ad365be64f73a1a4cc38f74508142023-01-30T04:12:53ZengElsevierElectrochemistry Communications1388-24812023-02-01147107440Insights into the reaction pathways of platinum dissolution and oxidation during electrochemical processesSumit Bawari0Tharangattu N. Narayanan1Jagannath Mondal2Corresponding authors.; Tata Institute of Fundamental Research-Hyderabad, Sy. No. 36/P Serilingampally Mandal, Ranga Reddy District, Hyderabad 500046, IndiaCorresponding authors.; Tata Institute of Fundamental Research-Hyderabad, Sy. No. 36/P Serilingampally Mandal, Ranga Reddy District, Hyderabad 500046, IndiaCorresponding authors.; Tata Institute of Fundamental Research-Hyderabad, Sy. No. 36/P Serilingampally Mandal, Ranga Reddy District, Hyderabad 500046, IndiaRecent studies have shown the limits of passivity of the platinum electrode. Since it is an important benchmarked electrode for various catalysis reactions and a vital counter electrode, it is essential to understand the mechanism of leaching of the platinum electrode. This report studies the electrochemically driven oxidation and leaching of platinum using a combined theoretical and experimental framework. With insights from electrochemistry, surface enhanced Raman spectroscopy, and electrochemically driven reactive MD, different regimes of chemisorption, surface oxidation, and 3D oxide formation are uncovered that directly affect leaching of individual Pt2+(H2O)4 molecules.http://www.sciencedirect.com/science/article/pii/S1388248123000140PlatinumOxidationLeachingReaxFFSERS
spellingShingle Sumit Bawari
Tharangattu N. Narayanan
Jagannath Mondal
Insights into the reaction pathways of platinum dissolution and oxidation during electrochemical processes
Electrochemistry Communications
Platinum
Oxidation
Leaching
ReaxFF
SERS
title Insights into the reaction pathways of platinum dissolution and oxidation during electrochemical processes
title_full Insights into the reaction pathways of platinum dissolution and oxidation during electrochemical processes
title_fullStr Insights into the reaction pathways of platinum dissolution and oxidation during electrochemical processes
title_full_unstemmed Insights into the reaction pathways of platinum dissolution and oxidation during electrochemical processes
title_short Insights into the reaction pathways of platinum dissolution and oxidation during electrochemical processes
title_sort insights into the reaction pathways of platinum dissolution and oxidation during electrochemical processes
topic Platinum
Oxidation
Leaching
ReaxFF
SERS
url http://www.sciencedirect.com/science/article/pii/S1388248123000140
work_keys_str_mv AT sumitbawari insightsintothereactionpathwaysofplatinumdissolutionandoxidationduringelectrochemicalprocesses
AT tharangattunnarayanan insightsintothereactionpathwaysofplatinumdissolutionandoxidationduringelectrochemicalprocesses
AT jagannathmondal insightsintothereactionpathwaysofplatinumdissolutionandoxidationduringelectrochemicalprocesses