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Simpson NG, Broadhead EJ, Casto AM, Tibbetts KM. Enhancement of Metal Nanostructure Deposition on Silicon Laser-Induced Periodic Surface Structures by Galvanic Replacement. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:241-250. [PMID: 38113511 DOI: 10.1021/acs.langmuir.3c02435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
We report a chemically motivated, single-step method to enhance metal deposition onto silicon laser-induced periodic surface structures (LIPSSs) using reactive laser ablation in liquid (RLAL). Galvanic replacement (GR) reactions were used in conjunction with RLAL (GR-RLAL) to promote the deposition of Au and Cu nanostructures onto a Si LIPSS. To increase the deposition of Au, sacrificial metals Cu, Fe, and Zn were used; Fe and Zn also enhanced the deposition of Cu. We show that the deposited metal content, surface morphology, and metal crystallite size can be tuned based on the difference in electrochemical potentials of the deposited and sacrificial metal. Compared to the Au and Cu reference samples, GR more than doubled the metal content on the LIPSS and reduced metal crystallite sizes by up to 20%. The ability to tune the metal content and crystalline domain size simultaneously makes GR-RLAL a potentially useful approach in the manufacturing of functional metal-LIPSS materials such as surface-enhanced Raman spectroscopy substrates.
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Affiliation(s)
- Nicholas G Simpson
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Eric J Broadhead
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Addison M Casto
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Katharine Moore Tibbetts
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
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Ghaith ME, Abd El-Moghny MG, Alalawy HH, El-Shakre ME, El-Deab MS. Enhancing the performance of Ni nanoparticle modified carbon felt towards glycerol electrooxidation: impact of organic additive. RSC Adv 2023; 13:10893-10902. [PMID: 37033436 PMCID: PMC10077114 DOI: 10.1039/d3ra01197f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 03/28/2023] [Indexed: 04/11/2023] Open
Abstract
Organic additives are widely used in the deposition baths of metals and alloys thanks to their special function which affects the growth and the building of the crystal. This study investigates the effect of glycerol on Ni deposition onto carbon felt (CF) and its effect on the catalytic activity towards glycerol electrooxidation. The impact of glycerol on the morphology, distribution, and particle size of the electrodeposited Ni is disclosed using a scanning electron microscope (SEM). X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV) techniques were used to probe the possible changes of the electrodeposited Ni oxide phases. Electrochemical measurements show that the as-synthesized Ni0.05@CF electrocatalyst prepared in the presence of 50 mM glycerol has a marked activity towards glycerol electrooxidation, as confirmed by the impressive increase of the oxidation current by about 1.6 times concurrently with a favorable negative shift of its onset potential. Moreover, the charge transfer resistance (R ct) is much reduced from 140 to 87 ohm. The addition of glycerol to the deposition bath is believed to retard the growth of the formed Ni deposits while enhancing the nucleation rate and thus increases the particle density and, consequently, the distribution of deposited Ni over the entire CF is improved along with increasing the surface concentration and surface-active sites. This assumption is supported by density functional theory (DFT) calculations.
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Affiliation(s)
- Mohamed E Ghaith
- Chemistry Department, Faculty of Science, Cairo University Egypt
| | | | - Hafsa H Alalawy
- Chemistry Department, Faculty of Science, Cairo University Egypt
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Ghaith ME, Abd El-Moghny MG, El-Nagar GA, Alalawy HH, El-Shakre ME, El-Deab MS. Tailor-designed binary Ni-Cu nano dendrites decorated 3D-carbon felts for efficient glycerol electrooxidation. RSC Adv 2023; 13:895-905. [PMID: 36686903 PMCID: PMC9811513 DOI: 10.1039/d2ra06853b] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 12/20/2022] [Indexed: 01/06/2023] Open
Abstract
Herein, 3D-Carbon Felt (CF) are decorated with nickel-copper (Ni-Cu@CF) bimetallic nanostructures through either sequential or co-electrodeposition tactics. Their catalytic activity towards glycerol electrooxidation is investigated by employing cyclic voltammetry (CV) and linear sweep voltammetry LSV. The morphology and composition of the various Ni-Cu@CF are investigated using X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) together with various electrochemical measurements (e.g., CV, chronoamperometry, LSV). The co-deposition of Ni-Cu shows a dendritic-like structure with higher electrocatalytic activity towards glycerol electrooxidation compared to the monometallic counterparts. Interestingly, the best electrode (NiCu@CF Ni particles as the top layer) prepared by sequential electrodeposition shows 1.6-fold higher glycerol oxidation activity, manifested in oxidation current, compared to Ni-coated CF due to Ni particles covering the surface of dendritic copper uniformly. Thus, the surface concentration of Ni is increased and at the same time a synergistic effect occurs between Ni and Cu by the simple addition of Cu which reinforces the surface concentration of Ni from 3.4 × 10-8 to 1.1 × 10-7 mol cm-2.
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Affiliation(s)
- Mohamed E Ghaith
- Chemistry Department, Faculty of Science, Cairo University Cairo Egypt
| | | | - Gumaa A El-Nagar
- Chemistry Department, Faculty of Science, Cairo University Cairo Egypt
- Helmholtz-Zentrum Berlin für Materialien und Energie Berlin Germany
| | - Hafsa H Alalawy
- Chemistry Department, Faculty of Science, Cairo University Cairo Egypt
| | | | - Mohamed S El-Deab
- Chemistry Department, Faculty of Science, Cairo University Cairo Egypt
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Touni A, Liu X, Kang X, Carvalho PA, Diplas S, Both KG, Sotiropoulos S, Chatzitakis A. Galvanic Deposition of Pt Nanoparticles on Black TiO 2 Nanotubes for Hydrogen Evolving Cathodes. CHEMSUSCHEM 2021; 14:4993-5003. [PMID: 34478230 PMCID: PMC9291612 DOI: 10.1002/cssc.202101559] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/23/2021] [Indexed: 05/06/2023]
Abstract
A galvanic deposition method for the in-situ formation of Pt nanoparticles (NPs) on top and inner surfaces of high-aspect-ratio black TiO2 -nanotube electrodes (bTNTs) for true utilization of their total surface area has been developed. Density functional theory calculations indicated that the deposition of Pt NPs was favored on bTNTs with a preferred [004] orientation and a deposition mechanism occurring via oxygen vacancies, where electrons were localized. High-resolution transmission electron microscopy images revealed a graded deposition of Pt NPs with an average diameter of around 2.5 nm along the complete nanotube axis (length/pore diameter of 130 : 1). Hydrogen evolution reaction (HER) studies in acidic electrolytes showed comparable results to bulk Pt (per geometric area) and Pt/C commercial catalysts (per mg of Pt). The presented novel HER cathodes of minimal engineering and low noble metal loadings (μg cm-2 range) achieved low Tafel slopes (30-34 mV dec-1 ) and high stability in acidic conditions. This study provides important insights for the in-situ formation and deposition of NPs in high-aspect-ratio structures for energy applications.
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Affiliation(s)
- Aikaterini Touni
- Department of ChemistryAristotle University of Thessaloniki54124ThessalonikiGreece
| | - Xin Liu
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
| | - Xiaolan Kang
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
| | | | - Spyros Diplas
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
- SINTEF IndustryPOB 124 Blindern0314OsloNorway
| | - Kevin G. Both
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
| | | | - Athanasios Chatzitakis
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
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Touni A, Grammenos OA, Banti A, Karfaridis D, Prochaska C, Lambropoulou D, Pavlidou E, Sotiropoulos S. Iridium oxide-nickel-coated titanium anodes for the oxygen evolution reaction. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138866] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ternary IrO2-Pt-Ni deposits prepared by galvanic replacement as bifunctional oxygen catalysts. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114499] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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The Ethanol Oxidation Reaction Performance of Carbon-Supported PtRuRh Nanorods. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10113923] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In this study, carbon-supported Pt-based catalysts, including PtRu, PtRh, and PtRuRh nanorods (NRs), were prepared by the formic acid reduction method for ethanol oxidation reaction (EOR) application. The aspect ratio of all experimental NRs is 4.6. The X-ray photoelectron spectroscopy and H2-temperature-programmed reduction results confirm that the ternary PtRuRh has oxygen-containing species (OCS), including PtOx, RuOx and RhOx, on its surface and shows high EOR current density at 0.6 V. The corresponding physical structure results indicate that the surface OCS can enhance the adsorption of ethanol through bi-functional mechanism and thereby promote the EOR activity. On the other hand, the chronoamperometry (CA) results imply that the ternary PtRuRh has the highest mass activity, specific activity, and stability among all catalysts. The aforementioned pieces of evidence reveal that the presence of OCS facilitates the oxidation of adsorbed intermediates, such as CO or CHx, which prevents the Pt active sites from poisoning and thus simultaneously improves the current density and durability of PtRuRh NRs in EOR.
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Touni A, Papaderakis A, Karfaridis D, Vourlias G, Sotiropoulos S. Oxygen Evolution Reaction at IrO 2/Ir(Ni) Film Electrodes Prepared by Galvanic Replacement and Anodization: Effect of Precursor Ni Film Thickness. Molecules 2019; 24:E2095. [PMID: 31159428 PMCID: PMC6600157 DOI: 10.3390/molecules24112095] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 05/28/2019] [Accepted: 05/29/2019] [Indexed: 11/16/2022] Open
Abstract
IrO2/Ir(Ni) film electrodes of variable Ni content have been prepared via a galvanic replacement method, whereby surface layers of pre-deposited Ni are replaced by Ir, followed by electrochemical anodization. Electrodeposition of Ni on a glassy carbon electrode support has been carried out at constant potential and the charge of electrodeposited Ni controlled so as to investigate the effect of precursor Ni layer thickness on the electrocatalytic activity of the corresponding IrO2/Ir(Ni)/GC electrodes for the oxygen evolution reaction (OER). After their preparation, these electrodes were characterized by microscopic (SEM) and spectroscopic (EDS, XPS) techniques, revealing the formation of Ir deposits on the Ni support and a thin IrO2 layer on their surfaces. To determine the electroactive surface area of the IrO2 coatings, cyclic voltammograms were recorded in the potential range between hydrogen and oxygen evolution and the charge under the anodic part of the curves, corresponding to Ir surface oxide formation, served as an indicator of the quantity of active IrO2 in the film. The electrocatalytic activity of the coatings for OER was investigated by current-potential curves under steady state conditions, revealing that the catalysts prepared from thinner Ni films exhibited enhanced electrocatalytic performance.
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Affiliation(s)
- Aikaterini Touni
- Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Athanasios Papaderakis
- Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Dimitrios Karfaridis
- Department of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Georgios Vourlias
- Department of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Sotirios Sotiropoulos
- Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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Pt-Ni and Pt-M-Ni (M = Ru, Sn) Anode Catalysts for Low-Temperature Acidic Direct Alcohol Fuel Cells: A Review. ENERGIES 2017. [DOI: 10.3390/en10010042] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Liu Z, Huang Z, Cheng F, Guo Z, Wang G, Chen X, Wang Z. Efficient Dual-Site Carbon Monoxide Electro-Catalysts via Interfacial Nano-Engineering. Sci Rep 2016; 6:33127. [PMID: 27650532 PMCID: PMC5030650 DOI: 10.1038/srep33127] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 08/19/2016] [Indexed: 11/09/2022] Open
Abstract
Durable, highly efficient, and economic sound electrocatalysts for CO electrooxidation (COE) are the emerging key for wide variety of energy solutions, especially fuel cells and rechargeable metal-air batteries. Herein, we report the novel system of nickel-aluminum double layered hydroxide (NiAl-LDH) nanoplates on carbon nanotubes (CNTs) network. The formulation of such complexes system was to be induced through the assistance of gold nanoparticles in order to form dual-metal active sites so as to create a extended Au/NiO two phase zone. Bis (trifluoromethylsulfonyl)imide (NTf2) anion of ionic liquid electrolyte was selected to enhance the CO/O2 adsorption and to facilitate electro-catalyzed oxidation of Ni (OH)2 to NiOOH by increasing the electrophilicity of catalytic interface. The resulting neutral catalytic system exhibited ultra-high electrocatalytic activity and stability for CO electrooxidation than commercial and other reported precious metal catalysts. The turnover frequency (TOF) of the LDH-Au/CNTs COE catalyst was much higher than the previous reported other similar electrocatalysts, even close to the activity of solid-gas chemical catalysts at high temperature. Moreover, in the long-term durability testing, the negligible variation of current density remains exsisting after 1000 electrochemistry cycles.
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Affiliation(s)
- Zhen Liu
- Department of Chemistry, Xavier University of Louisiana, New Orleans, LA 70125, USA
- Department of Physics & Engineering, Frostburg State University, Frostburg, MD 21532-2303, USA
- Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA
| | - Zhongyuan Huang
- Department of Chemistry, Xavier University of Louisiana, New Orleans, LA 70125, USA
| | - Feifei Cheng
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhanhu Guo
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA
| | - Guangdi Wang
- Department of Chemistry, Xavier University of Louisiana, New Orleans, LA 70125, USA
| | - Xu Chen
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhe Wang
- Department of Chemistry, Xavier University of Louisiana, New Orleans, LA 70125, USA
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