ACS electrochemistry最新文献

{"title":"Challenges in the Theory and Atomistic Simulation of Metal Electrodeposition.","authors":"Shayantan Chaudhuri, Reinhard J Maurer","doi":"10.1021/acselectrochem.4c00102","DOIUrl":"10.1021/acselectrochem.4c00102","url":null,"abstract":"<p><p>Electrodeposition is a fundamental process in electrochemistry and has applications in numerous industries, such as corrosion protection, decorative finishing, energy storage, catalysis, and electronics. While there is a long history of electrodeposition use, its application for controlled nanostructure growth is limited. The establishment of an atomic-scale understanding of the electrodeposition process and dynamics is crucial to enable the controlled fabrication of metal nanoparticles and other nanostructures. Significant advancements in molecular simulation capabilities and the electronic structure theory of electrified solid-liquid interfaces bring theory closer to realistic applications, but a gap remains between applications, a theoretical understanding of dynamics, and atomistic simulation. In this Review, we briefly summarize the current state-of-the-art computational techniques available for the simulation of electrodeposition and electrochemical growth on surfaces and identify the remaining open challenges.</p>","PeriodicalId":520400,"journal":{"name":"ACS electrochemistry","volume":"1 7","pages":"1014-1032"},"PeriodicalIF":0.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12235630/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144602697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microalgae-Based Hybrid Biophotoelectrode for Efficient Light Energy Conversion.","authors":"Caio C G Silva, Guilherme Martins, André Luís, Hernán D Rojas-Mantilla, Ana Rovisco, Rodrigo Martins, Elvira Fortunato, Inês A C Pereira, Maria V B Zanoni, Saulo S Garrido, Felipe Conzuelo","doi":"10.1021/acselectrochem.5c00053","DOIUrl":"10.1021/acselectrochem.5c00053","url":null,"abstract":"<p><p>Photosynthetic microorganisms are promising candidates for sustainable energy production in photobio-electrochemical systems. However, integrating them with electrodes is challenging due to the compartmentalized nature of photosynthetic organelles. Microalgae, in particular, have a more complex cell structure than cyanobacteria, leading to low electron transfer rates and compromising electrochemical communication. In this study, we propose a hybrid biophotoelectrode that integrates intact microalgae cells with a WO₃ semiconductor electrode using polydopamine for cell entrapment and charge transfer enhancement. The biophotoelectrode delivers photocurrents of up to 24 μA cm^-2 under visible light illumination with an incident light power below 6.0 mW cm^-2. The photoelectrode performance and the origin of electron flow are investigated, confirming a substantial contribution of immobilized microalgae to the overall photocurrent. We present a proof-of-concept application of the microalgae-based hybrid electrode in combination with a formate dehydrogenase biocathode for the implementation of a biophoto-electrochemical cell for the conversion of CO₂ to formate assisted by light. The system demonstrates the potential for coupling photosynthetic processes with bioelectrochemical conversion, achieving efficient and sustainable production of value-added chemicals. These findings advance our understanding of photosynthetic cell-electrode interactions in hybrid systems, offering insights for developing photobio-electrochemical devices and innovative conversion strategies for waste products.</p>","PeriodicalId":520400,"journal":{"name":"ACS electrochemistry","volume":"1 7","pages":"1184-1193"},"PeriodicalIF":0.0,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12235756/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144602699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ZnTiN₂ as an Electron-Selective, Protective Layer on Si Photocathodes.","authors":"Anna C Kundmann, John S Mangum, Mellie Lemon, Maria Kelly, Dennice M Roberts, Melissa K Gish, Elisa M Miller, Emily L Warren, Frank E Osterloh, Ann L Greenaway","doi":"10.1021/acselectrochem.4c00155","DOIUrl":"10.1021/acselectrochem.4c00155","url":null,"abstract":"<p><p>Photoelectrochemical production of fuels requires photoelectrodes that efficiently convert sunlight to electrochemical energy by producing photovoltage and photocurrent and maintain this ability over time under a variety of pH, illumination, and applied bias conditions. Work in the photovoltaic community has demonstrated that interfaces with high charge carrier selectivity provide high photovoltages. This offers a co-design opportunity to create semiconductor photoelectrodes with contact layers that are both carrier-selective and offer protection from degradation in aqueous solutions. In this work, we explored the ternary nitride ZnTiN₂ as an electron-selective, protective layer for Si-based photocathodes. We demonstrated that ZnTiN₂ formed a heterojunction with p-type Si that facilitated electron movement toward the ZnTiN₂ surface for light-driven reduction reactions. Across a variety of electrolyte conditions, ZnTiN₂/Si produced an open circuit voltage of ca. 400 mV vs the solution potential, while bare Si produced 220-480 mV vs the solution potential depending on conditions. ZnTiN₂ was also shown to protect Si over 72 h at open circuit in the dark in 0.1 M KHCO₃ aqueous solution at pH 10.5, with a 2.4% loss in open circuit voltage compared to a 17% loss for unprotected Si. A protective effect was also observed under illumination during methyl viologen reduction at pH 3.5 for 21 h, with a 2.5% loss in open circuit voltage observed for ZnTiN₂/Si compared to a 25% loss in open circuit voltage for unprotected Si under the same conditions. Elemental characterization revealed the presence of oxides on the surface of ZnTiN₂ that are consistent with the Pourbaix diagram after photoelectrochemical operation; these oxides appeared to support durability without hindering charge carrier extraction to drive electrochemical work. This work highlights the promise of ZnTiN₂ for durable photoelectrochemical applications.</p>","PeriodicalId":520400,"journal":{"name":"ACS electrochemistry","volume":"1 6","pages":"842-852"},"PeriodicalIF":0.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12147160/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144268393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanistic Understanding of Lithium-Ion Adsorption, Intercalation, and Plating during Charging of Graphite Electrodes.","authors":"Brian Chen, Niya Hope-Glenn, Amanda Wright, Robert J Messinger, Alexander Couzis","doi":"10.1021/acselectrochem.4c00079","DOIUrl":"https://doi.org/10.1021/acselectrochem.4c00079","url":null,"abstract":"<p><p>Low-temperature and fast-charging lithium (Li)-ion batteries remain challenging due to the undesirable Li plating on graphite anodes under these conditions. Here, we present a kinetic mechanism that underpins electrochemical Li⁺ cation intercalation and Li metal plating reactions on graphite electrodes at low temperatures and fast rates. Variable-temperature (30 °C to -40 °C) and variable-rate (0.1 to 10 mA/cm²) constant-current measurements were conducted on three-electrode cells comprised of Li metal counter, graphite working, and Li metal reference electrodes, as well as two-electrode cells. The local minima in the potential profiles, often associated with the nucleation overpotential for Li metal plating on graphite, must be disentangled from contributions from Li metal stripping at the counter electrode. Differential capacity analyses of three-electrode measurements of graphite potential show that the extent of electrochemical Li⁺ cation intercalation drops precipitously as temperature decreases below -20 °C. The temperature dependence of empirically defined rate constants for Li⁺ cation intercalation and Li plating determined from constant-current measurements revealed non-Arrhenius behavior for Li⁺ cation intercalation that suggests a two-step pre-equilibration mechanism, while typical Arrhenius behavior for Li plating suggests a unimolecular single-step process. A kinetic model based on Langmuir adsorption shows that the interfacial concentration of Li⁺ cations adsorbed on graphite active sites is critical in dictating the kinetics of the charging process. We show that rate limitations, either adsorption-limited or surface reaction-limited, manifest at different temperatures and rates during the charging process. The results yield new mechanistic understanding of how Li⁺ cations electrochemically compete for intercalation into and plating on graphite electrodes, as a function of temperature and charge rate.</p>","PeriodicalId":520400,"journal":{"name":"ACS electrochemistry","volume":"1 5","pages":"574-587"},"PeriodicalIF":0.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12051203/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144035191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Scanning Electrochemical Cell Microscopy for Sub-Micrometer Mass Spectrometric Studies of Electrochemical Reactions.","authors":"Lingjie Zhang, Madison E Edwards, Oluwasegun J Wahab, Hugo Y Samayoa-Oviedo, Dallas P Freitas, Xin Yan, Lane A Baker","doi":"10.1021/acselectrochem.5c00095","DOIUrl":"10.1021/acselectrochem.5c00095","url":null,"abstract":"<p><p>Nanoscale electrochemistry has been significantly advanced through the utilization of nanopipettes, enabling precise electrode area confinement and localized measurements. In particular, scanning electrochemical cell microscopy (SECCM) has leveraged the use of nanopipettes to facilitate measurement of electrochemical processes with high spatiotemporal resolution. While nano electrochemistry is well-suited to study processes at the sub-micrometer level, there is a need for complementary analytical techniques that can enable the detection of intermediates and help to elucidate reaction pathways that occur in the small volumes. In this work, we demonstrate the coupling of SECCM with MS for the detection of reaction products formed by the oxidation of uric acid. Specifically, species generated at the tip of an SECCM probe could be delivered to a mass spectrometer via nanoelectrospray ionization and exhibit both stable ion signal and high sensitivity. We demonstrate that this workflow enables the detection of analytes generated from SECCM probes of 3 μm and 900 nm tip diameter, despite the low conversion ratio associated with the smaller nanopipette diameters. Results presented herein demonstrate the SECCM-MS workflow as a powerful approach to detect low-abundance species formed from micro- and nanoscale electrochemical reactions.</p>","PeriodicalId":520400,"journal":{"name":"ACS electrochemistry","volume":"1 7","pages":"1066-1075"},"PeriodicalIF":0.0,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12235642/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144602714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular Electrocatalysis in Confined Spaces: Analysis of the Cyclic Staircase and Cyclic Voltammetry Responses.","authors":"Antonio J Martínez-García, José V Hernández-Tovar, Manuela López-Tenés, Joaquín González","doi":"10.1021/acselectrochem.4c00241","DOIUrl":"10.1021/acselectrochem.4c00241","url":null,"abstract":"<p><p>Molecular electrocatalytic processes in confined environments are becoming relevant processes with many applications in electrosynthesis, electroanalysis, and electrical energy generation and conversion. Nevertheless, the analysis of catalytic responses is mostly carried out with theoretical frameworks developed for semi-infinite linear diffusion conditions, which are not applicable for the adequate understanding of electrochemical processes in confined spaces. To fill the existing gap in the comprehension of these complex reactions, the analysis of a molecular catalytic process under finite diffusive conditions for cyclic staircase voltammetry (CSCV) and cyclic voltammetry (CV) techniques is presented in this work. The proposed model considers a finite diffusive field of thickness <i>L</i> under two configurations: bounded diffusion, where no mass renovation is allowed, and unbounded diffusion, where there is effective mass replenishment at <i>L</i>. Expressions for the current-potential responses under different particular cases have been obtained, leading to a kinetic zone diagram for limiting cases in terms of two key variables related to the thickness of the solution region and the catalytic rate constant. From the general expression of the current, it is observed that the electrochemical response of molecular electrocatalytic processes taking place in confined spaces is strongly dependent on the mass transport conditions. Thus, under bounded diffusion, a decrease of the catalytic current with <i>L</i> is observed, which is more pronounced when the diffusive field is narrower. On the other hand, unbounded conditions give rise to an enhancement of the catalytic current and, eventually, to the loss of the kinetic sensitivity of the response for small enough values of <i>L</i>. An experimental application of the theoretical results is performed for the conversion of isopropyl alcohol (IPA) to acetone mediated by the oxidation of 4-methoxy-2,2,6,6-tetra-methyl-1-piperi-dinyl-oxy (4-methoxy-TEMPO radical) at a glassy carbon electrode for both bound and unbounded configurations. The catalytic rate constant for this process has been obtained from the equations for the current, indicating that the accuracy of the result is strongly dependent on the correct understanding of the mass transport influences at play.</p>","PeriodicalId":520400,"journal":{"name":"ACS electrochemistry","volume":"1 7","pages":"1110-1124"},"PeriodicalIF":0.0,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12239016/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144610899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pyrolyzed Parylene-N for <i>in Vivo</i> Electrochemical Detection of Neurotransmitters.","authors":"He Zhao, Owen Markow, Greatness Olaitan, Eric D Donarski, Kevin C Lester, Nickolay V Lavrik, B Jill Venton","doi":"10.1021/acselectrochem.4c00180","DOIUrl":"https://doi.org/10.1021/acselectrochem.4c00180","url":null,"abstract":"<p><p>Carbon electrodes are typically used for <i>in vivo</i> dopamine detection, and new types of electrodes and customized fabrication methods will facilitate new applications. Parylene is an insulator that can be deposited in a thin layer on a substrate and then pyrolyzed to carbon to enable its use as an electrode. However, pyrolyzed parylene has not been used for the real-time detection of neurochemicals by fast-scan cyclic voltammetry. In this work, we deposited thin layers of parylene-N (PN) on metal wires and then pyrolyzed them to carbon with high temperatures in a rapid thermal processor (RTP). Different masses of PN, 1, 6, and 12 g, were deposited to vary the thickness. RTP-PN (6 g) produced a 194 nm layer carbon thickness and had optimal electrochemical stability. Pyrolyzed parylene-N modified electrodes (PPNMEs) were characterized for electrochemical detection of dopamine, serotonin, and adenosine. Background-normalized currents at PPNMEs were about 2 times larger than those of carbon-fiber microelectrodes (CFMEs). Rich defect sites and oxygen functional groups promoted the neurochemical adsorption of cationic neurotransmitters. PPNMEs resisted fouling from serotonin polymer formation. PPNMEs were used <i>in vivo</i> to detect stimulated dopamine release and monitor spontaneous adenosine release. Pyrolyzed parylene is a sensitive and fouling-resistant thin-film carbon electrode that could be used in the future for making customized electrodes and devices.</p>","PeriodicalId":520400,"journal":{"name":"ACS electrochemistry","volume":"1 5","pages":"730-740"},"PeriodicalIF":0.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12051191/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144057572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simultaneous UV/vis Absorption in Parallel Configuration, Photoluminescence and Raman Spectroelectrochemistry.","authors":"Fabiola Olmo, Martin Perez-Estebanez, Aranzazu Heras, Francisco Javier Del Campo, Alvaro Colina","doi":"10.1021/acselectrochem.5c00038","DOIUrl":"10.1021/acselectrochem.5c00038","url":null,"abstract":"<p><p>Analytical Chemistry is the science of chemical measurements that seeks to acquire the most comprehensive information about a chemical system. Recent advances in technology have facilitated the development of new combined analytical techniques capable of supplying analytical signals of different natures. These signals subsequently provide diverse information related to specific chemical reactions. This technical note proposes a new combination of three different spectroscopic techniques (UV/vis absorption spectroscopy in a parallel configuration, photoluminescence and Raman spectroscopy) with electrochemistry. To illustrate the capabilities of this new technique, two chemical systems (tris-(2,2' bipyridine)-ruthenium-(II) and ofloxacin) were selected. A comparison of the behavior of the two molecules during the electrode process demonstrates the advantages of obtaining several signals simultaneously in a single experiment.</p>","PeriodicalId":520400,"journal":{"name":"ACS electrochemistry","volume":"1 6","pages":"997-1002"},"PeriodicalIF":0.0,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12147439/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144268352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Direct Electrosynthesis of an Amino Acid from a Biomass Derivative.","authors":"Zamaan Mukadam, Sihang Liu, Soren B Scott, Yuxiang Zhou, Georg Kastlunger, Mary P Ryan, Maria Magdalena Titirici, Ifan E L Stephens","doi":"10.1021/acselectrochem.4c00171","DOIUrl":"https://doi.org/10.1021/acselectrochem.4c00171","url":null,"abstract":"<p><p>The electrochemical synthesis of nitrogen-containing molecules from biomass-derived compounds under ambient conditions is demonstrated, relying only on green sources of feedstock, renewable energy, and water. In this study, we report a two-step method of electrochemically synthesizing 5-(aminomethyl)furan-2-carboxylic acid (AFCA) from 5-hydroxymethylfurfural (HMF) using hydroxylamine (NH₂OH) as the nitrogen source in an acidic electrolyte. In the first step, HMF was reductively aminated into (5-(aminomethyl)furan-2-yl)methanol (HMFA) using NH₂OH as the source of nitrogen. This was followed by a second step, involving the oxidation of HMFA to AFCA on a manganese oxide (MnO _<i>x</i> ) anode at the same pH. MnO _<i>x</i> was able to selectively oxidize the alcohol group on HMFA to produce AFCA with 35% Faradaic efficiency without affecting the amine group. As both of these reactions are completed in a pH 1 electrolyte, it eliminates the need to separate HMFA before proceeding with the second reaction. Among different metal electrodes (Ag, Au, Cu, Pb, Pt and Sn) tested for the electrochemical reductive amination reaction, Ag electrodes displayed the best performance to selectively aminate HMF to the intermediate species, HMFA, with up to 69% Faradaic efficiency at mild potentials of -0.50 V_RHE. Density functional theory calculations were carried out to explore a possible reaction pathway for the reductive amination on Ag(111), which suggests a thermodynamically feasible reaction even at 0 V_RHE. The cathodic experimental reaction parameters were optimized to reveal that an electrolyte pH of 1 is optimal for the electrochemical reductive amination reaction. Our work shapes the future possibility of an electrochemical synthesis to produce AFCA without the need for any product separation between steps by combining the Ag cathode reaction to the MnO _<i>x</i> anode reaction sharing the same electrolyte. Since both the cathode and anode reactions both involve four electrons transferred, combining both half reactions in a single electrochemical reactor can eliminate the need for energy-wasting auxiliary counter reactions such as hydrogen evolution or water oxidation.</p>","PeriodicalId":520400,"journal":{"name":"ACS electrochemistry","volume":"1 5","pages":"699-708"},"PeriodicalIF":0.0,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12051197/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144036114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Measuring the Effects of Tunable Alkanethiol Monolayers on the Adsorption and Collision Dynamics of Platinum Nanoparticles.","authors":"Audrey Pumford, Lindsey M Pumford, Abigail Butcher, Ryan J White","doi":"10.1021/acselectrochem.4c00068","DOIUrl":"https://doi.org/10.1021/acselectrochem.4c00068","url":null,"abstract":"<p><p>Platinum nanoparticles (PtNPs) catalyze the Hydrogen Evolution Reaction upon colliding at a catalytically inactive electrode surface when sufficient potential is applied, and in the presence of adequate hydrogen ion concentration. Here, we investigated nanoscale interactions of PtNPs at alkanethiol modified gold electrode surfaces and examined the effects of monolayer hydrophilicity/hydrophobicity on single particle collision dynamics. After colliding with and adsorbing onto the modified electrode surface, PtNPs generate measurable cathodic current arising from the reduction of hydrogen. Each single particle collision is indicated by a spike-step or spike of current in the current time trace. The shape, frequency, and size of these current steps are dependent on the terminal chemistry of the alkanethiol covalently bound to the electrode surface. Using the collisional frequency as a function of PtNP concentration, we determined the rate of particle adsorption, <math> <msub><mrow><mi>k</mi></mrow> <mrow><mtext>ads</mtext></mrow> </msub> </math> , to be 2.23 × 10^-6 cm/s and 8.85 × 10^-6 cm/s for -CH₃ and -OH terminated surfaces, respectively. Electrodes modified with a mixture of alkanethiols (-CH₃/-OH) exhibited collision frequencies that scale linearly with the ratio of hydrophilicity of the alkanethiol immobilized on the electrode surface. The results indicate the dependence of intermolecular effects on PtNP collision dynamics at the electrode surface, with hydrophobic-dominating surfaces having the least observed collisions. This study provides insights into the influence of surface chemistry on single nanoparticle interactions, which could advance the designs of biosensors and more efficient nanocatalysts by offering a deeper understanding of the interfacial mechanism of PtNPs on modified electrode surfaces.</p>","PeriodicalId":520400,"journal":{"name":"ACS electrochemistry","volume":"1 3","pages":"378-385"},"PeriodicalIF":0.0,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12014222/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144049261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}