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Exploring dynamic solvation kinetics at electrocatalyst surfaces
The interface between electrocatalyst and electrolyte is highly dynamic. Even in absence of major structural changes, the intermediate coverage and interfacial solvent are bias and time dependent. This is not accounted for in current kinetic models. Here, we study the kinetics of the hydrogen evolut...
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Published in: | Nature communications 2024-09, Vol.15 (1), p.8204-11, Article 8204 |
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description | The interface between electrocatalyst and electrolyte is highly dynamic. Even in absence of major structural changes, the intermediate coverage and interfacial solvent are bias and time dependent. This is not accounted for in current kinetic models. Here, we study the kinetics of the hydrogen evolution, ammonia oxidation and oxygen reduction reactions on polycrystalline Pt with distinct intrinsic rates and intermediates (e.g. *H, *OH, *NH
2
, *N). Despite these differences, we discover shared relationships between the pre-exponential factor and the activation energy that we link to solvation kinetics in the presence of electronic excess charge and charged intermediates. Further, we study dynamic changes of these kinetic parameters with a millisecond time resolution during electrosorption and double layer charging and dynamic *N and *NO poisoning. Finally, we discover a pH-dependent activation entropy that explains non-Nernstian overpotential shifts with pH. In sum, our results demonstrate the importance of accounting for a bias and time-dependent interfacial solvent and catalyst surface.
Interfacial ion solvation is omnipresent in electrochemistry. Sarabia et al. now explore solvation kinetics with a millisecond time resolution and shine light on the critical role of the solvent during dynamic catalyst and electrosorption kinetics. |
doi_str_mv | 10.1038/s41467-024-52499-9 |
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2
, *N). Despite these differences, we discover shared relationships between the pre-exponential factor and the activation energy that we link to solvation kinetics in the presence of electronic excess charge and charged intermediates. Further, we study dynamic changes of these kinetic parameters with a millisecond time resolution during electrosorption and double layer charging and dynamic *N and *NO poisoning. Finally, we discover a pH-dependent activation entropy that explains non-Nernstian overpotential shifts with pH. In sum, our results demonstrate the importance of accounting for a bias and time-dependent interfacial solvent and catalyst surface.
Interfacial ion solvation is omnipresent in electrochemistry. Sarabia et al. now explore solvation kinetics with a millisecond time resolution and shine light on the critical role of the solvent during dynamic catalyst and electrosorption kinetics.</description><identifier>ISSN: 2041-1723</identifier><identifier>EISSN: 2041-1723</identifier><identifier>DOI: 10.1038/s41467-024-52499-9</identifier><identifier>PMID: 39294140</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>639/638/161 ; 639/638/440/951 ; 639/638/77/886 ; Activation energy ; Ammonia ; Bias ; Catalysts ; Chemical reduction ; Electrocatalysts ; Electrochemistry ; Energy charge ; Entropy of activation ; Humanities and Social Sciences ; Hydrogen evolution ; Intermediates ; Kinetics ; multidisciplinary ; Oxidation ; Oxygen reduction reactions ; pH effects ; Poisoning (reaction inhibition) ; Reaction kinetics ; Science ; Science (multidisciplinary) ; Solvation ; Solvents ; Time dependence</subject><ispartof>Nature communications, 2024-09, Vol.15 (1), p.8204-11, Article 8204</ispartof><rights>The Author(s) 2024</rights><rights>2024. The Author(s).</rights><rights>The Author(s) 2024. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>The Author(s) 2024 2024</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c422t-75fd50474b1c479de44f44e271c6306df109a8429dc17a1e1e8b1021aaa692483</cites><orcidid>0000-0003-3612-4059 ; 0009-0006-6482-1053 ; 0000-0002-8025-307X ; 0000-0003-0770-4089</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.proquest.com/docview/3106533609/fulltextPDF?pq-origsite=primo$$EPDF$$P50$$Gproquest$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.proquest.com/docview/3106533609?pq-origsite=primo$$EHTML$$P50$$Gproquest$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,885,25753,27924,27925,37012,37013,44590,53791,53793,75126</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/39294140$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Sarabia, Francisco</creatorcontrib><creatorcontrib>Gomez Rodellar, Carlos</creatorcontrib><creatorcontrib>Roldan Cuenya, Beatriz</creatorcontrib><creatorcontrib>Oener, Sebastian Z.</creatorcontrib><title>Exploring dynamic solvation kinetics at electrocatalyst surfaces</title><title>Nature communications</title><addtitle>Nat Commun</addtitle><addtitle>Nat Commun</addtitle><description>The interface between electrocatalyst and electrolyte is highly dynamic. Even in absence of major structural changes, the intermediate coverage and interfacial solvent are bias and time dependent. This is not accounted for in current kinetic models. Here, we study the kinetics of the hydrogen evolution, ammonia oxidation and oxygen reduction reactions on polycrystalline Pt with distinct intrinsic rates and intermediates (e.g. *H, *OH, *NH
2
, *N). Despite these differences, we discover shared relationships between the pre-exponential factor and the activation energy that we link to solvation kinetics in the presence of electronic excess charge and charged intermediates. Further, we study dynamic changes of these kinetic parameters with a millisecond time resolution during electrosorption and double layer charging and dynamic *N and *NO poisoning. Finally, we discover a pH-dependent activation entropy that explains non-Nernstian overpotential shifts with pH. In sum, our results demonstrate the importance of accounting for a bias and time-dependent interfacial solvent and catalyst surface.
Interfacial ion solvation is omnipresent in electrochemistry. Sarabia et al. now explore solvation kinetics with a millisecond time resolution and shine light on the critical role of the solvent during dynamic catalyst and electrosorption kinetics.</description><subject>639/638/161</subject><subject>639/638/440/951</subject><subject>639/638/77/886</subject><subject>Activation energy</subject><subject>Ammonia</subject><subject>Bias</subject><subject>Catalysts</subject><subject>Chemical reduction</subject><subject>Electrocatalysts</subject><subject>Electrochemistry</subject><subject>Energy charge</subject><subject>Entropy of activation</subject><subject>Humanities and Social Sciences</subject><subject>Hydrogen evolution</subject><subject>Intermediates</subject><subject>Kinetics</subject><subject>multidisciplinary</subject><subject>Oxidation</subject><subject>Oxygen reduction reactions</subject><subject>pH effects</subject><subject>Poisoning (reaction inhibition)</subject><subject>Reaction kinetics</subject><subject>Science</subject><subject>Science 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Even in absence of major structural changes, the intermediate coverage and interfacial solvent are bias and time dependent. This is not accounted for in current kinetic models. Here, we study the kinetics of the hydrogen evolution, ammonia oxidation and oxygen reduction reactions on polycrystalline Pt with distinct intrinsic rates and intermediates (e.g. *H, *OH, *NH
2
, *N). Despite these differences, we discover shared relationships between the pre-exponential factor and the activation energy that we link to solvation kinetics in the presence of electronic excess charge and charged intermediates. Further, we study dynamic changes of these kinetic parameters with a millisecond time resolution during electrosorption and double layer charging and dynamic *N and *NO poisoning. Finally, we discover a pH-dependent activation entropy that explains non-Nernstian overpotential shifts with pH. In sum, our results demonstrate the importance of accounting for a bias and time-dependent interfacial solvent and catalyst surface.
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subjects | 639/638/161 639/638/440/951 639/638/77/886 Activation energy Ammonia Bias Catalysts Chemical reduction Electrocatalysts Electrochemistry Energy charge Entropy of activation Humanities and Social Sciences Hydrogen evolution Intermediates Kinetics multidisciplinary Oxidation Oxygen reduction reactions pH effects Poisoning (reaction inhibition) Reaction kinetics Science Science (multidisciplinary) Solvation Solvents Time dependence |
title | Exploring dynamic solvation kinetics at electrocatalyst surfaces |
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