.png){kind=icon}
返回
Exploring dynamic solvation kinetics at electrocatalyst surfaces
.png){kind=icon}
OA
AI
DOI：10.1038/s41467-024-52499-9.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
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, *NH2, *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.
Keyword:
ELECTROCHEMICAL PROTON-TRANSFER
ANODIC-OXIDATION
AMMONIA
ENTROPY
COMPENSATION
CHEMISTRY
ELECTRON
PT(100)
PT(111)
OXIDES
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
15.7
论文数:
9.4W
被引数:
91.2W
机构
引用论文
Modulation and voltage balancing control of dual five-level ANPC inverter for ship electric propulsion systems船舶电力推进系统双五电平ANPC逆变器的调制与电压平衡控制
OAAI
OAAI分享收藏Analysis of Heavy Metal Toxic Ions by Adsorption onto Amino-functionalized Ordered Mesoporous SilicaOAAI
OAAI分享收藏In situ surface coverage analysis of RuO2-catalysed HCl oxidation reveals the entropic origin of compensation in heterogeneous catalysis.png)
NATURE CHEMISTRY
NATURE CHEMISTRYIF20.2
PREAI
分享收藏分享收藏
查看更多内容