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Wang L, Housel LM, Bock DC, Abraham A, Dunkin MR, McCarthy AH, Wu Q, Kiss A, Thieme J, Takeuchi ES, Marschilok AC, Takeuchi KJ. Deliberate Modification of Fe 3O 4 Anode Surface Chemistry: Impact on Electrochemistry. ACS APPLIED MATERIALS & INTERFACES 2019; 11:19920-19932. [PMID: 31042346 DOI: 10.1021/acsami.8b21273] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Fe3O4 nanoparticles (NPs) with an average size of 8-10 nm have been successfully functionalized with various surface-treatment agents to serve as model systems for probing surface chemistry-dependent electrochemistry of the resulting electrodes. The surface-treatment agents used for the functionalization of Fe3O4 anode materials were systematically varied to include aromatic or aliphatic structures: 4-mercaptobenzoic acid, benzoic acid (BA), 3-mercaptopropionic acid, and propionic acid (PA). Both structural and electrochemical characterizations have been used to systematically correlate the electrode functionality with the corresponding surface chemistry. Surface treatment with ligands led to better Fe3O4 dispersion, especially with the aromatic ligands. Electrochemistry was impacted where the PA- and BA-treated Fe3O4 systems without the -SH group demonstrated a higher rate capability than their thiol-containing counterparts and the pristine Fe3O4. Specifically, the PA system delivered the highest capacity and cycling stability among all samples tested. Notably, the aromatic BA system outperformed the aliphatic PA counterpart during extended cycling under high current density, due to the improved charge transfer and ion transport kinetics as well as better dispersion of Fe3O4 NPs, induced by the conjugated system. Our surface engineering of the Fe3O4 electrode presented herein, highlights the importance of modifying the structure and chemistry of surface-treatment agents as a plausible means of enhancing the interfacial charge transfer within metal oxide composite electrodes without hampering the resulting tap density of the resulting electrode.
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Affiliation(s)
- Lei Wang
- Department of Chemistry , State University of New York at Stony Brook , Stony Brook , New York 11794-3400 , United States
| | - Lisa M Housel
- Department of Chemistry , State University of New York at Stony Brook , Stony Brook , New York 11794-3400 , United States
| | - David C Bock
- Energy Sciences Directorate , Brookhaven National Laboratory , Interdisciplinary Sciences Building, Building 734, Upton , New York 11973 , United States
| | - Alyson Abraham
- Department of Chemistry , State University of New York at Stony Brook , Stony Brook , New York 11794-3400 , United States
| | - Mikaela R Dunkin
- Department of Materials Science and Chemical Engineering , State University of New York at Stony Brook , Stony Brook , New York 11794-2275 , United States
| | - Alison H McCarthy
- Department of Materials Science and Chemical Engineering , State University of New York at Stony Brook , Stony Brook , New York 11794-2275 , United States
| | - Qiyuan Wu
- Energy Sciences Directorate , Brookhaven National Laboratory , Interdisciplinary Sciences Building, Building 734, Upton , New York 11973 , United States
| | - Andrew Kiss
- National Synchrotron Light Source II , Brookhaven National Laboratory , Building 743, Upton , New York 11973-5000 , United States
| | - Juergen Thieme
- National Synchrotron Light Source II , Brookhaven National Laboratory , Building 743, Upton , New York 11973-5000 , United States
| | - Esther S Takeuchi
- Department of Chemistry , State University of New York at Stony Brook , Stony Brook , New York 11794-3400 , United States
- Energy Sciences Directorate , Brookhaven National Laboratory , Interdisciplinary Sciences Building, Building 734, Upton , New York 11973 , United States
- Department of Materials Science and Chemical Engineering , State University of New York at Stony Brook , Stony Brook , New York 11794-2275 , United States
| | - Amy C Marschilok
- Department of Chemistry , State University of New York at Stony Brook , Stony Brook , New York 11794-3400 , United States
- Energy Sciences Directorate , Brookhaven National Laboratory , Interdisciplinary Sciences Building, Building 734, Upton , New York 11973 , United States
- Department of Materials Science and Chemical Engineering , State University of New York at Stony Brook , Stony Brook , New York 11794-2275 , United States
| | - Kenneth J Takeuchi
- Department of Chemistry , State University of New York at Stony Brook , Stony Brook , New York 11794-3400 , United States
- Department of Materials Science and Chemical Engineering , State University of New York at Stony Brook , Stony Brook , New York 11794-2275 , United States
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Escalera-López D, Gómez E, Vallés E. Electrochemical growth of CoNi and Pt-CoNi soft magnetic composites on an alkanethiol monolayer-modified ITO substrate. Phys Chem Chem Phys 2015; 17:16575-86. [PMID: 26055346 DOI: 10.1039/c5cp02291f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
CoNi and Pt-CoNi magnetic layers on indium-tin oxide (ITO) substrates modified by an alkanethiol self-assembled monolayer (SAM) have been electrochemically obtained as an initial stage to prepare semiconducting layer-SAM-magnetic layer hybrid structures. The best conditions to obtain the maximum compactness of adsorbed layers of dodecanethiol (C12-SH) on ITO substrate have been studied using contact angle, AFM, XPS and electrochemical tests. The electrochemical characterization (electrochemical probe or voltammetric response in blank solutions) is fundamental to ensure the maximum blocking of the substrate. Although the electrodeposition process on the SAM-modified ITO substrate is very slow if the blocking of the surface is significant, non-cracked metallic layers of CoNi, with or without a previously electrodeposited seed-layer of platinum, have been obtained by optimizing the deposition potentials. Initial nucleation is expected to take place at the pinhole defects of the C12-SH SAM, followed by a mushroom-like growth regime through the SAM interface that allows the formation of a continuous metallic layer electrically connected to the ITO surface. Due to the potential of the methodology, the preparation of patterned metallic deposits on ITO substrate using SAMs with different coverage as templates is feasible.
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Affiliation(s)
- D Escalera-López
- Grup d'Electrodeposició de Capes Primes i Nanoestructures (Ge-CPN), Departament de Química Física and Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
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