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Del Colle V, Melle G, Previdello BA, Feliu JM, Varela H, Tremiliosi-Filho G. The effect of Pt surface orientation on the oscillatory electro-oxidation of glycerol. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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2
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Rizo R, Fernández-Vidal J, Hardwick LJ, Attard GA, Vidal-Iglesias FJ, Climent V, Herrero E, Feliu JM. Investigating the presence of adsorbed species on Pt steps at low potentials. Nat Commun 2022; 13:2550. [PMID: 35538173 PMCID: PMC9090771 DOI: 10.1038/s41467-022-30241-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 04/22/2022] [Indexed: 11/09/2022] Open
Abstract
The study of the OH adsorption process on Pt single crystals is of paramount importance since this adsorbed species is considered the main intermediate in many electrochemical reactions of interest, in particular, those oxidation reactions that require a source of oxygen. So far, it is frequently assumed that the OH adsorption on Pt only takes place at potentials higher than 0.55 V (versus the reversible hydrogen electrode), regardless of the Pt surface structure. However, by CO displacement experiments, alternating current voltammetry, and Raman spectroscopy, we demonstrate here that OH is adsorbed at more negative potentials on the low coordinated Pt atoms, the Pt steps. This finding opens a new door in the mechanistic study of many relevant electrochemical reactions, leading to a better understanding that, ultimately, can be essential to reach the final goal of obtaining improved catalysts for electrochemical applications of technological interest.
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Affiliation(s)
- Rubén Rizo
- Instituto de Electroquímica, Universidad de Alicante, Apdo. 99, E-03080, Alicante, Spain.
| | - Julia Fernández-Vidal
- Stephenson Institute for Renewable Energy, University of Liverpool, Peach Street, Liverpool, L69 7ZF, UK
| | - Laurence J Hardwick
- Stephenson Institute for Renewable Energy, University of Liverpool, Peach Street, Liverpool, L69 7ZF, UK
| | - Gary A Attard
- Department of Physics, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK
| | | | - Victor Climent
- Instituto de Electroquímica, Universidad de Alicante, Apdo. 99, E-03080, Alicante, Spain
| | - Enrique Herrero
- Instituto de Electroquímica, Universidad de Alicante, Apdo. 99, E-03080, Alicante, Spain.
| | - Juan M Feliu
- Instituto de Electroquímica, Universidad de Alicante, Apdo. 99, E-03080, Alicante, Spain.
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3
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da Silva KN, Soffiati G, da Silva EZ, San-Miguel MA, Sitta E. Using the site-knockout strategy to understand the low activity of the nitrate electro-reduction reaction on Pt(111). NEW J CHEM 2022. [DOI: 10.1039/d2nj01773c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
While nitrite reduction proceeds on surfaces with less than three contiguous Pt(111)-sites, the nitrate reduction is inhibited on these conditions.
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Affiliation(s)
- Kaline Nascimento da Silva
- Chemistry Department, Federal University of Sao Carlos, Rod. Washington Luis, km 235, Sao Carlos, 13565-905, Brazil
- Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, 00560, Finland
| | - Gabriela Soffiati
- Institute of Chemistry, State University of Campinas, ZIP code 13083-970, Campinas, SP, Brazil
| | - Edison Z. da Silva
- Institute of Physics “Gleb Wataghin”, State University of Campinas, 13083-859, Campinas - SP, Brazil
| | - Miguel Angel San-Miguel
- Institute of Chemistry, State University of Campinas, ZIP code 13083-970, Campinas, SP, Brazil
| | - Elton Sitta
- Chemistry Department, Federal University of Sao Carlos, Rod. Washington Luis, km 235, Sao Carlos, 13565-905, Brazil
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Briega-Martos V, Sarabia FJ, Climent V, Herrero E, Feliu JM. Cation Effects on Interfacial Water Structure and Hydrogen Peroxide Reduction on Pt(111). ACS MEASUREMENT SCIENCE AU 2021; 1:48-55. [PMID: 36785745 PMCID: PMC9836069 DOI: 10.1021/acsmeasuresciau.1c00004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The interface between the Pt(111) surface and several MeF/HClO4 (Me+ = Li+, Na+, or Cs+) aqueous electrolytes is investigated by means of cyclic voltammetry and laser-induced temperature jump experiments. Results point out that the effect of the electrolyte on the interfacial water structure is different depending on the nature of the metal alkali cation, with the values of the potential of maximum entropy (pme) following the order pme (Li+) < pme (Na+) < pme (Cs+). In addition, the hydrogen peroxide reduction reaction is studied under these conditions. This reaction is inhibited at low potentials as a consequence of the build up of negative charges on the electrode surface. The potential where this inhibition takes place (E inhibition) follows the same trend as the pme. These results evidence that the activity of an electrocatalytic reaction can depend to great extent on the structure of the interfacial water adlayer and that the latter can be modulated by the nature of the alkali metal cation.
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da Silva KN, Sitta E. Oscillatory dynamics during the methanol electrooxidation reaction on Pt(111). Phys Chem Chem Phys 2021; 23:22263-22272. [PMID: 34644370 DOI: 10.1039/d1cp02490f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Despite several papers describing the oscillatory methanol electrooxidation reaction (OMOR) catalyzed by polycrystalline Pt, these dynamic instabilities are less explored on single crystalline surfaces. Herein, we observed and mapped for the first time the OMOR on Pt(111) in non-adsorbing anion solutions as well as in the presence of small amounts of sulfate anions. Period 1 oscillations with oscillation frequencies from 1.2 to 2.0 Hz were observed for methanol concentrations higher than 1.0 M, with no evolution to more complex patterns. These oscillations occur in the potential range in which PtOH is partially covering the surface without irreversible oxidation processes. Small changes in both the mean potential (Em) and the poisoning rate along the time-series were observed, the so-called drift, and were explained in terms of the accumulation of intermediates at the interface. The presence of sulfate strongly inhibits the OMOR, and the results are discussed in terms of sulfate adlayer formation on {111} domains.
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Affiliation(s)
- Kaline Nascimento da Silva
- Chemistry Department, Federal University of Sao Carlos, Rod. Washington Luis, km 235, Sao Carlos, 13565-905, Brazil.
| | - Elton Sitta
- Chemistry Department, Federal University of Sao Carlos, Rod. Washington Luis, km 235, Sao Carlos, 13565-905, Brazil. .,Center for Innovation on New Energies, Campinas, 13083-841, Brazil
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6
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Surface characterization of copper electrocatalysts by lead underpotential deposition. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115446] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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7
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Surface charge and interfacial acid-base properties: pKa,2 of carbon dioxide at Pt(110)/perchloric acid solution interfaces. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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8
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New insights into the hydrogen peroxide reduction reaction and its comparison with the oxygen reduction reaction in alkaline media on well-defined platinum surfaces. J Catal 2021. [DOI: 10.1016/j.jcat.2021.04.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Briega-Martos V, Cheuquepán W, Feliu JM. Detection of Superoxide Anion Oxygen Reduction Reaction Intermediate on Pt(111) by Infrared Reflection Absorption Spectroscopy in Neutral pH Conditions. J Phys Chem Lett 2021; 12:1588-1592. [PMID: 33539102 PMCID: PMC8460065 DOI: 10.1021/acs.jpclett.0c03510] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 02/01/2021] [Indexed: 05/10/2023]
Abstract
In this work, in situ external infrared reflection absorption spectroscopy (IRRAS) is successfully employed for the detection of intermediate species in the oxygen reduction reaction (ORR) mechanism on a flat and well-defined Pt surface. Superoxide anion species (O2-) are detected on the Pt(111) surface in an O2-saturated solution with a NaF/HClO4 mixture with pH 5.5 by the observation of a O-O vibration band at ca. 1080 cm-1. The observation of O2- without the use of any other additional method of signal enhancement is possible because in these experimental conditions O2- is the main ORR-generated intermediate and its reactivity is limited in this pH. This leads to the accumulation of O2- near the Pt surface, facilitating its identification.
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Affiliation(s)
| | - William Cheuquepán
- Instituto
de Electroquímica, Universidad de
Alicante, Apdo. 99, E-03080 Alicante,Spain
| | - Juan M. Feliu
- Instituto
de Electroquímica, Universidad de
Alicante, Apdo. 99, E-03080 Alicante,Spain
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10
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Auer A, Andersen M, Wernig EM, Hörmann NG, Buller N, Reuter K, Kunze-Liebhäuser J. Self-activation of copper electrodes during CO electro-oxidation in alkaline electrolyte. Nat Catal 2020. [DOI: 10.1038/s41929-020-00505-w] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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11
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Morooka T, Sagara T. Electrowetting of Hydrofluoroether Liquid Droplet at a Gold Electrode/Water Interface: Significance of Lower Adhesion Energy and Static Friction Energy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:9685-9692. [PMID: 32787114 DOI: 10.1021/acs.langmuir.0c00829] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We explored the electrowetting behavior of a hydrofluoroester solvent, Novec 7100 (Novec), as a liquid droplet on a Au(111) electrode in water (0.05 M KClO4). Comparison with the electrowetting of hexadecane (HD) highlighted the significance of the lower adhesion energy and static friction energy of Novec than those of HD. The electrode potential-dependent contact angle θ of a Novec droplet showed little hysteresis. When potentials were set by means of potential steps, a Novec droplet increased its θ at more positive potentials than the potential of zero charge (pzc) of the Au(111) electrode. We found that the key factor of the electrowetting behavior for Novec is its low adhesion energy and static friction energy. The static friction energy of the oils to the Au(111) electrode surface was evaluated by a comparative analysis of the potential dependence of the interfacial tension at the solid/water interface, ΔγS/W-E curve, calculated from electrochemical surface charge data and the experimental cos θ-E curve: 2.6 mN/m for HD and 0.95 mN/m for Novec. When Br- was added in the aqueous solution to allow its adsorption on the Au surface surrounding a Novec droplet, the potential of maximum cos θ was shifted to negative. Overall, although the Novec droplet showed a narrower range of θ change than a HD droplet, the Novec droplet seldom got stuck to the surface as far as potential step was used, reflecting the narrower plateau region of θ near the pzc. Also, the specific adsorption of a coexistent anion was a significant factor of θ. This work has featured the significance of a slippy droplet on an electrode surface, giving an impact on the technology of microfluid transportation control by electric potentials.
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Affiliation(s)
- Tetsuro Morooka
- Department of Advanced Technology and Science for Sustainable Development, Graduate School of Engineering, Nagasaki University, Bunkyo 1-14, Nagasaki 852-8521, Japan
| | - Takamasa Sagara
- Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University, Bunkyo 1-14, Nagasaki 852-8521, Japan
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12
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Climent V, Feliu J. Single Crystal Electrochemistry as an In Situ Analytical Characterization Tool. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2020; 13:201-222. [PMID: 32243760 DOI: 10.1146/annurev-anchem-061318-115541] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The electrochemical behavior of platinum single crystal surfaces can be taken as a model response for the interpretation of the activity of heterogeneous electrodes. The cyclic voltammogram of a given platinum electrode can be considered a fingerprint characteristic of the distribution of sites on its surface. We start this review by providing some simple mathematical descriptions of the voltammetric response in the presence of adsorption processes. We then describe the voltammogram of platinum basal planes, followed by the response of stepped surfaces. The voltammogram of polycrystalline materials can be understood as a composition of the response of the different basal contributions. Further resolution in the discrimination of different surface sites can be achieved with the aid of surface modification using adatoms such as bismuth or germanium. The application of these ideas is exemplified with the consideration of real catalysts composed of platinum nanoparticles with preferential shapes.
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Affiliation(s)
- Víctor Climent
- Instituto Universitario de Electroquímica, Universidad de Alicante, E-03690, San Vicente del Raspeig, Alicante, Spain;
| | - Juan Feliu
- Instituto Universitario de Electroquímica, Universidad de Alicante, E-03690, San Vicente del Raspeig, Alicante, Spain;
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Waidhas F, Haschke S, Khanipour P, Fromm L, Görling A, Bachmann J, Katsounaros I, Mayrhofer KJJ, Brummel O, Libuda J. Secondary Alcohols as Rechargeable Electrofuels: Electrooxidation of Isopropyl Alcohol at Pt Electrodes. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00818] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
| | - Sandra Haschke
- Lehrstuhl Chemistry of Thin Film Materials, IZNF, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstrasse 3, 91058 Erlangen, Germany
| | - Peyman Khanipour
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstrasse 3, Erlangen 91058, Germany
| | - Lukas Fromm
- Lehrstuhl für Theoretische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Andreas Görling
- Lehrstuhl für Theoretische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Julien Bachmann
- Lehrstuhl Chemistry of Thin Film Materials, IZNF, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstrasse 3, 91058 Erlangen, Germany
- Institute of Chemistry, Saint Petersburg State University, 26 Universitetskii Prospect, Petergof, Saint Petersburg 198504, Russia
| | - Ioannis Katsounaros
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstrasse 3, Erlangen 91058, Germany
| | - Karl J. J. Mayrhofer
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstrasse 3, Erlangen 91058, Germany
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14
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Martínez-Hincapié R, Climent V, Feliu JM. Peroxodisulfate reduction on platinum stepped surfaces vicinal to the (110) and (100) poles. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.113226] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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15
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Effects of the Interfacial Structure on the Methanol Oxidation on Platinum Single Crystal Electrodes. SURFACES 2019. [DOI: 10.3390/surfaces2010014] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Methanol oxidation has been studied on low index platinum single crystal electrodes using methanol solutions with different pH (1–5) in the absence of specific adsorption. The goal is to determine the role of the interfacial structure in the reaction. The comparison between the voltammetric profiles obtained in the presence and absence of methanol indicates that methanol oxidation is only taking place when the surface is partially covered by adsorbed OH. Thus, on the Pt(111) electrode, the onset for the direct oxidation of methanol and the adsorption of OH coincide. In this case, the adsorbed OH species are not a mere spectator, because the obtained results for the reaction order for methanol and the proton concentrations indicate that OH adsorbed species are involved in the reaction mechanism. On the other hand, the dehydrogenation step to yield adsorbed CO on the Pt(100) surface coincides with the onset of OH adsorption on this electrode. It is proposed that adsorbed OH collaborates in the dehydrogenation step during methanol oxidation, facilitating either the adsorption of the methanol in the right configuration or the cleavage of the C—H bond.
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16
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Dimakis N, Salas I, Gonzalez L, Loupe N, Smotkin ES. Electron density topological and adsorbate orbital analyses of water and carbon monoxide co-adsorption on platinum. J Chem Phys 2019; 150:024703. [PMID: 30646698 DOI: 10.1063/1.5046183] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The electron density topology of carbon monoxide (CO) on dry and hydrated platinum is evaluated under the quantum theory of atoms in molecules (QTAIM) and by adsorbate orbital approaches. The impact of water co-adsorbate on the electronic, structural, and vibrational properties of CO on Pt are modelled by periodic density functional theory (DFT). At low CO coverage, increased hydration weakens C-O bonds and strengthens C-Pt bonds, as verified by changes in bond lengths and stretching frequencies. These results are consistent with QTAIM, the 5σ donation-2π* backdonation model, and our extended π-attraction σ-repulsion model (extended π-σ model). This work links changes in the non-zero eigenvalues of the electron density Hessian at QTAIM bond critical points to changes in the π and σ C-O bonds with systematic variation of CO/H2O co-adsorbate scenarios. QTAIM invariably shows bond strengths and lengths as being negatively correlated. For atop CO on hydrated Pt, QTAIM and phenomenological models are consistent with a direct correlation between C-O bond strength and CO coverage. However, DFT modelling in the absence of hydration shows that C-O bond lengths are not negatively correlated to their stretching frequencies, in contrast to the Badger rule: When QTAIM and phenomenological models do not agree, the use of the non-zero eigenvalues of the electron density Hessian as inputs to the phenomenological models, aligns them with QTAIM. The C-O and C-Pt bond strengths of bridge and three-fold bound CO on dry and hydrated platinum are also evaluated by QTAIM and adsorbate orbital analyses.
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Affiliation(s)
- Nicholas Dimakis
- Department of Physics and Astronomy, University of Texas Rio Grande Valley, 1201 W. University Drive, Edinburg, Texas 78539-2999, USA
| | - Isaiah Salas
- Achieve Early College High School, McAllen, Texas 78501, USA
| | - Luis Gonzalez
- PSJA Thomas Jefferson T-STEM Early College HS, Pharr, Texas 78577, USA
| | - Neili Loupe
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, USA
| | - Eugene S Smotkin
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, USA
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17
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The potential of zero total charge and electrocatalytic properties of Ru@Pt core-shell nanoparticles. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2018.11.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Faisal F, Bertram M, Stumm C, Waidhas F, Brummel O, Libuda J. Preparation of complex model electrocatalysts in ultra-high vacuum and transfer into the electrolyte for electrochemical IR spectroscopy and other techniques. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:114101. [PMID: 30501282 DOI: 10.1063/1.5047056] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 10/27/2018] [Indexed: 06/09/2023]
Abstract
Model studies at complex, yet well-defined electrodes can provide a better understanding of electrocatalytic reactions. New experimental devices are required to prepare such model electrocatalysts with atomic-level control. In this work, we discuss the design of a new setup, which enables the preparation of well-defined electrocatalysts in ultra-high vacuum (UHV) using the full portfolio of surface science techniques. The setup allows for direct transfer of samples from UHV and the immersion into the electrolyte without contact to air. As a special feature, the single crystal sample is transferred without any sample holder, which makes the system easily compatible with most electrochemical in situ methods, specifically with electrochemical infrared reflection absorption spectroscopy, but also with other characterization methods such as single-crystal cyclic voltammetry, differential electrochemical mass spectrometry, or electrochemical scanning tunneling microscopy. We demonstrate the preparation in UHV, the transfer in inert atmosphere, and the immersion into the electrolyte for a complex model catalyst that requires surface science methods for preparation. Specifically, we study Pt nanoparticles supported on well-ordered Co3O4(111) films which are grown on an Ir(100) single crystal. In comparison with reference experiments on Pt(111), the model catalyst shows a remarkably different adsorption and reaction behavior during CO electrooxidation in alkaline environments.
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Affiliation(s)
- Firas Faisal
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, D-91058 Erlangen, Germany
| | - Manon Bertram
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, D-91058 Erlangen, Germany
| | - Corinna Stumm
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, D-91058 Erlangen, Germany
| | - Fabian Waidhas
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, D-91058 Erlangen, Germany
| | - Olaf Brummel
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, D-91058 Erlangen, Germany
| | - Jörg Libuda
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, D-91058 Erlangen, Germany
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Arulmozhi N, Esau D, van Drunen J, Jerkiewicz G. Design and Development of Instrumentations for the Preparation of Platinum Single Crystals for Electrochemistry and Electrocatalysis Research Part 3: Final Treatment, Electrochemical Measurements, and Recommended Laboratory Practices. Electrocatalysis (N Y) 2017. [DOI: 10.1007/s12678-017-0426-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Brummel O, Waidhas F, Khalakhan I, Vorokhta M, Dubau M, Kovács G, Aleksandrov HA, Neyman KM, Matolín V, Libuda J. Structural transformations and adsorption properties of PtNi nanoalloy thin film electrocatalysts prepared by magnetron co-sputtering. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.08.062] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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22
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Design and Development of Instrumentations for the Preparation of Platinum Single Crystals for Electrochemistry and Electrocatalysis Research. Part 2: Orientation, Cutting, and Annealing. Electrocatalysis (N Y) 2017. [DOI: 10.1007/s12678-017-0385-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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23
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Sebastián P, Martínez-Hincapié R, Climent V, Feliu J. Study of the Pt (111) | electrolyte interface in the region close to neutral pH solutions by the laser induced temperature jump technique. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.01.089] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
Understanding protein-inorganic surface interactions is central to the rational design of new tools in biomaterial sciences, nanobiotechnology and nanomedicine. Although a significant amount of experimental research on protein adsorption onto solid substrates has been reported, many aspects of the recognition and interaction mechanisms of biomolecules and inorganic surfaces are still unclear. Theoretical modeling and simulations provide complementary approaches for experimental studies, and they have been applied for exploring protein-surface binding mechanisms, the determinants of binding specificity towards different surfaces, as well as the thermodynamics and kinetics of adsorption. Although the general computational approaches employed to study the dynamics of proteins and materials are similar, the models and force-fields (FFs) used for describing the physical properties and interactions of material surfaces and biological molecules differ. In particular, FF and water models designed for use in biomolecular simulations are often not directly transferable to surface simulations and vice versa. The adsorption events span a wide range of time- and length-scales that vary from nanoseconds to days, and from nanometers to micrometers, respectively, rendering the use of multi-scale approaches unavoidable. Further, changes in the atomic structure of material surfaces that can lead to surface reconstruction, and in the structure of proteins that can result in complete denaturation of the adsorbed molecules, can create many intermediate structural and energetic states that complicate sampling. In this review, we address the challenges posed to theoretical and computational methods in achieving accurate descriptions of the physical, chemical and mechanical properties of protein-surface systems. In this context, we discuss the applicability of different modeling and simulation techniques ranging from quantum mechanics through all-atom molecular mechanics to coarse-grained approaches. We examine uses of different sampling methods, as well as free energy calculations. Furthermore, we review computational studies of protein-surface interactions and discuss the successes and limitations of current approaches.
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Design and Development of Instrumentations for the Preparation of Platinum Single Crystals for Electrochemistry and Electrocatalysis Research. Part 1: Semi-Automated Crystal Growth. Electrocatalysis (N Y) 2016. [DOI: 10.1007/s12678-016-0331-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Understanding the electrochemical differences of Pt doped and Pt supported over CeO2. J Solid State Electrochem 2013. [DOI: 10.1007/s10008-013-2252-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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