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Drault F, Ferain E, Lisboa MC, Hermans S, Demoustier-Champagne S. Tuning Au/SiO 2 nanostructures from 1D to 3D interconnected nanotube networks using polycarbonate porous templates. NANOSCALE 2023; 15:14981-14993. [PMID: 37661913 DOI: 10.1039/d3nr03783e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
We report a simple process, based on the combination of sol-gel deposition and nano-templating with polycarbonate membranes, for the synthesis of 1D to 3D free-standing silica (SiO2) interconnected nanotube (NT) networks. The thickness and porosity of the SiO2 nanotube walls can be, respectively, controlled by adjusting the ethanol amount in the sol-gel reaction mixture and by the addition or not of a porogen agent during the synthesis. Internal functionalization of 1D and 3D porous and non-porous SiO2 NTs by Au nanoparticles (NPs) was then performed using electroless deposition leading to particle sizes ranging from 15 to 20 nm. Characterization of all these systems by SEM-EDX, TEM, ICP and XPS clearly demonstrated the impact of the porosity of SiO2 on the amount and localization of Au NPs. Selective functionalization of the inner or the inner + outer surfaces of SiO2 NTs was achieved by keeping or freeing the SiO2 NTs from the template prior to electroless deposition, respectively. Moreover, UV-visible analysis confirmed plasmon resonance associated with Au NPs in all functionalized systems, paving the way to applications in many fields such as nano-medicine or (photo-)catalysis. In particular, the free-standing interconnected silica-based nanotube systems provide unique features of great interest for use in nanoscale fluidic bioseparation, sensing, and flow (photo)-catalytic chemistry, as demonstrated herein for the photodegradation of methylene blue.
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Affiliation(s)
- Fabien Drault
- Institute of Condensed Matter and Nanosciences (BSMA division), UCLouvain, Croix du Sud 1, B-1348, Louvain-la-Neuve, Belgium.
- Institute of Condensed Matter and Nanosciences (MOST division), UCLouvain, 1 Place Louis Pasteur, B-1348 Louvain-la- Neuve, Belgium.
| | - Etienne Ferain
- Institute of Condensed Matter and Nanosciences (BSMA division), UCLouvain, Croix du Sud 1, B-1348, Louvain-la-Neuve, Belgium.
- Institute of Condensed Matter and Nanosciences (MOST division), UCLouvain, 1 Place Louis Pasteur, B-1348 Louvain-la- Neuve, Belgium.
- it4ip S.A., Avenue Jean-Etienne Lenoir 1, B-1348 Louvain-la-Neuve, Belgium
| | - Milena Chagas Lisboa
- Institute of Condensed Matter and Nanosciences (BSMA division), UCLouvain, Croix du Sud 1, B-1348, Louvain-la-Neuve, Belgium.
| | - Sophie Hermans
- Institute of Condensed Matter and Nanosciences (MOST division), UCLouvain, 1 Place Louis Pasteur, B-1348 Louvain-la- Neuve, Belgium.
| | - Sophie Demoustier-Champagne
- Institute of Condensed Matter and Nanosciences (BSMA division), UCLouvain, Croix du Sud 1, B-1348, Louvain-la-Neuve, Belgium.
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Li R, Lu J, Bao J, Xiong F, Chen T, Zhang W. In-situelectrochemical fabrication of Ag@AgCl NW-PET film with superior photocatalytic bactericidal activity. NANOTECHNOLOGY 2022; 34:075703. [PMID: 36379057 DOI: 10.1088/1361-6528/aca2b2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
Constructing a composite photocatalyst with efficient charge-transfer pathways is contribute to improving charge separation, which has attracted wide attention owing to its availability in photocatalysis applications. In this work, three-dimensional (3D) silver@silver chloride (Ag@AgCl) network structures are fabricated for photocatalytic inactivation ofEscherichia coli(E. coli) by thein situelectrochemical introducing AgCl shell on the surface of Ag nanowire (NW) networks that are coated on a polyethylene terephthalate (PET) substrate. The obtained Ag@AgCl NW-PET films exhibit good photocatalytic bactericidal activity againstE. coliunder simulated Sunlight irradiation, mainly due to their efficient charge-transport channel constructed by the Ag NWs network. It is worth noting that the content of converted AgCl shell is positively correlated with their photocatalytic bactericidal efficiency. The experimental results also demonstrate that the synergistic contribution of Ag+sustained release, rough surfaces and energy band structure optimization in photocatalytic sterilization. Besides, the prepared Ag@AgCl NW-PET film can be recycled, and the photocatalytic sterilization efficiency can still keep above 99% after three cycles. This work might provide new and more diverse opportunities for the development of excellent charge-transport, recyclable photocatalysts for photocatalytic sterilization.
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Affiliation(s)
- Rui Li
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Jingwen Lu
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Jiashuan Bao
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Furong Xiong
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Tongtong Chen
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Wang Zhang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
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Hossain UH, Jantsen G, Muench F, Kunz U, Ensinger W. Increasing the structural and compositional diversity of ion-track templated 1D nanostructures through multistep etching, plastic deformation, and deposition. NANOTECHNOLOGY 2022; 33:245603. [PMID: 35235910 DOI: 10.1088/1361-6528/ac59e5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
Ion-track etching represents a highly versatile way of introducing artificial pores with diameters down into the nm-regime into polymers, which offers considerable synthetic flexibility in template-assisted nanofabrication schemes. While the mechanistic foundations of ion-track technology are well understood, its potential for creating structurally and compositionally complex nano-architectures is far from being fully tapped. In this study, we showcase different strategies to expand the synthetic repertoire of ion-track membrane templating by creating several new 1D nanostructures, namely metal nanotubes of elliptical cross-section, funnel-shaped nanotubes optionally overcoated with titania or nickel nanospike layers, and concentrical as well as stacked metal nanotube-nanowire heterostructures. These nano-architectures are obtained solely by applying different wet-chemical deposition methods (electroless plating, electrodeposition, and chemical bath deposition) to ion-track etched polycarbonate templates, whose pore geometry is modified through plastic deformation, consecutive etching steps under differing conditions, and etching steps intermitted by spatially confined deposition, providing new motifs for nanoscale replication.
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Affiliation(s)
- U H Hossain
- Technische Universität Darmstadt, Department of Materials Science, Materials Analysis, Alarich-Weiss-Str.2, D-64287 Darmstadt, Germany
| | - G Jantsen
- Technische Universität Darmstadt, Department of Materials Science, Materials Analysis, Alarich-Weiss-Str.2, D-64287 Darmstadt, Germany
| | - F Muench
- Technische Universität Darmstadt, Department of Materials Science, Materials Analysis, Alarich-Weiss-Str.2, D-64287 Darmstadt, Germany
| | - U Kunz
- Technische Universität Darmstadt, Department of Materials Science, Materials Analysis, Alarich-Weiss-Str.2, D-64287 Darmstadt, Germany
| | - W Ensinger
- Technische Universität Darmstadt, Department of Materials Science, Materials Analysis, Alarich-Weiss-Str.2, D-64287 Darmstadt, Germany
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Wang J, Li C, Zhu W, Meng J, Liang C. Hollow PtCo Nanowires with Rough Surfaces as Highly Active Electrocatalysts for Oxygen Reduction Reaction. ChemistrySelect 2021. [DOI: 10.1002/slct.202101120] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jincheng Wang
- School of Chemical Engineering Dalian University of Technology Laboratory of Advanced Materials and Catalytic Engineering Dalian University of Technology Dalian 116024 China
| | - Chuang Li
- School of Chemical Engineering Dalian University of Technology Laboratory of Advanced Materials and Catalytic Engineering Dalian University of Technology Dalian 116024 China
| | - Wenjun Zhu
- School of Chemical Engineering Dalian University of Technology Laboratory of Advanced Materials and Catalytic Engineering Dalian University of Technology Dalian 116024 China
| | - Jipeng Meng
- School of Chemical Engineering Dalian University of Technology Laboratory of Advanced Materials and Catalytic Engineering Dalian University of Technology Dalian 116024 China
| | - Changhai Liang
- School of Chemical Engineering Dalian University of Technology Laboratory of Advanced Materials and Catalytic Engineering Dalian University of Technology Dalian 116024 China
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Amin KM, Muench F, Kunz U, Ensinger W. 3D NiCo-Layered double Hydroxide@Ni nanotube networks as integrated free-standing electrodes for nonenzymatic glucose sensing. J Colloid Interface Sci 2021; 591:384-395. [PMID: 33631526 DOI: 10.1016/j.jcis.2021.02.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 02/02/2021] [Accepted: 02/07/2021] [Indexed: 12/29/2022]
Abstract
Nickel cobalt layered double hydroxide (NiCo-LDH)-based materials have recently emerged as catalysts for important electrochemical applications. However, they frequently suffer from low electrical conductivity and agglomeration, which in turn impairs their performance. Herein, we present a catalyst design based on integrated, self-supported nickel nanotube networks (Ni-NTNWs) loaded with NiCo-LDH nanosheets, which represents a binder-free, hierarchically nanostructured electrode architecture combining continuous conduction paths and openly accessible macropores of low tortuosity with an ultrahigh density of active sites. Similar to macroscale metallic foams, the NTNWs serve as three-dimensionally interconnected, robust frameworks for the deposition of active material, but are structured in the submicron range. Our synthesis is solely based on scalable approaches, namely templating with commercial track-etched membranes, electroless plating, and electrodeposition. Morphological and compositional characterization proved the successful decoration of the inner and outer nanotube surfaces with a conformal NiCo-LDH layer. Ni-NTNW electrodes and hydroxide-decorated variants showed excellent performance in glucose sensing. The highest activity was achieved for the catalyst augmented with NiCo-LDH nanosheets, which surpassed the modification with pure Ni(OH)2. Despite its low thickness of 20 µm, the optimized catalyst layer provided an outstanding sensitivity of 4.6 mA mM-1 cm-2, a low detection limit of 0.2 µM, a fast response time of 5.3 s, high selectivity and stability, and two linear ranges covering four orders of magnitude, up to 2.5 mM analyte. As such, derivatized interconnected metal nano-networks represent a promising design paradigm for highly miniaturized yet effective catalyst electrodes and electrochemical sensors.
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Affiliation(s)
- Khaled M Amin
- Department of Materials Science, Technische Universität Darmstadt, Darmstadt 64287, Germany; Department of Polymer Chemistry, Atomic Energy Authority, Cairo 11787, Egypt.
| | - Falk Muench
- Department of Materials Science, Technische Universität Darmstadt, Darmstadt 64287, Germany
| | - Ulrike Kunz
- Department of Materials Science, Technische Universität Darmstadt, Darmstadt 64287, Germany
| | - Wolfgang Ensinger
- Department of Materials Science, Technische Universität Darmstadt, Darmstadt 64287, Germany
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Zhang S, Chen M, Zhao X, Cai J, Yan W, Yen JC, Chen S, Yu Y, Zhang J. Advanced Noncarbon Materials as Catalyst Supports and Non-noble Electrocatalysts for Fuel Cells and Metal–Air Batteries. ELECTROCHEM ENERGY R 2021. [DOI: 10.1007/s41918-020-00085-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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7
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Scheuerlein MC, Ensinger W. Development of a nanoscale electroless plating procedure for bismuth and its application in template-assisted nanotube fabrication. RSC Adv 2021; 11:8636-8642. [PMID: 35423366 PMCID: PMC8695131 DOI: 10.1039/d1ra00978h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 02/16/2021] [Indexed: 12/22/2022] Open
Abstract
Electroless plating is a versatile technique for the facile and controlled synthesis of metallic thin films and nanostructures. While there are numerous known procedures involving transition metals, reports on the electroless plating of post-transition metals are particularly rare, even without considering specific nanofabrication requirements. In this work we outline the development of a remarkably stable electroless plating bath for nanoscale bismuth coatings, based on the reduction of Bi–EDTA by borane dimethylamine. Its suitability for nanostructure fabrication is showcased by coating ion-track etched polycarbonate membranes, creating Bi tubes with sub-micron diameters in the process. This procedure could be particularly useful for the development and improvement of high surface-area Bi based catalysts and heavy metal sensors. We outline the development of a remarkably stable electroless bismuth plating bath. Its nanofabrication potential is showcased by coating ion-track etched polymer membranes, enabling the synthesis of sub-micron diameter bismuth tubes.![]()
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Affiliation(s)
| | - Wolfgang Ensinger
- Department of Materials and Earth Sciences
- Technical University of Darmstadt
- D-64287 Darmstadt
- Germany
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Aleksovska A, Lönnecke P, Hey-Hawkins E. Zn- and Cd-based coordination polymers with a novel anthracene dicarboxylate ligand for highly selective detection of hydrogen peroxide. Dalton Trans 2020; 49:4817-4823. [PMID: 32215416 DOI: 10.1039/d0dt00333f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A one-dimensional {[Zn(L)(DMF)2]}n (1) and a three-dimensional {[Cd(L)(DMF)]·DMF}n (2) coordination polymer based on the novel anthracene derivative H2L (H2L = 4,4'-(9,10-anthracenediyl)dicinnamic acid) were obtained by solvothermal synthesis and charaterised by single-crystal and powder X-ray diffraction, thermogravimetry, and infrared spectroscopy. The anthracene derivative H2L and coordination polymers 1 and 2 were used to modify a glassy carbon electrode and as such served as an active material for detection of H2O2. Cyclic voltammograms in the potential range from 0 to -0.5 V revealed concentration-dependent cathodic current in all three cases with a lower detection limit of 200 μM. The electrode modified with compound 2 showed the best performance towards hydrogen peroxide detection. The results suggest that the development of electrodes modified with inorganic polymers based on highly conjugated ligands can serve as potential electrocatalytic materials.
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Affiliation(s)
- Angela Aleksovska
- Leipzig University, Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, D-04103 Leipzig, Germany.
| | - Peter Lönnecke
- Leipzig University, Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, D-04103 Leipzig, Germany.
| | - Evamarie Hey-Hawkins
- Leipzig University, Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, D-04103 Leipzig, Germany.
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Stohr T, Brötz J, Oezaslan M, Muench F. Dual Metastability in Electroless Plating: Complex Inertness Enabling the Deposition of Composition-Tunable Platinum Copper Alloy Nanostructures. Chemistry 2020; 26:3030-3033. [PMID: 31944457 PMCID: PMC7079153 DOI: 10.1002/chem.202000158] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Indexed: 12/02/2022]
Abstract
Autocatalytic deposition represents a facile, versatile, and scalable wet-chemical tool for nanofabrication. However, the intricate component interplay in plating baths containing multiple metal species impedes alloy deposition. We resolved this challenge in the bimetallic copper-platinum system by exploiting the kinetic stability of platinum complexes, which allows adjusting their ligand sphere and thus reactivity independently from the present copper ions in a preceding, thermally activated ligand exchange step. By using metastable PtIV precursors of varying degrees of complexation, copper-platinum alloys of adjustable atomic ratio were plated from solutions of identical composition and concentration, but differing local coordination environment. Due to its excellent conformity and nanoscale homogeneity, the reaction is compatible with ambitious 3D substrate morphologies, as demonstrated in the template-assisted fabrication of nanotubes with high aspect ratio. The ability to generate additional synthetic degrees of freedom by decoupling the metal complex speciation from the solution composition is of large interest for redox-chemical synthesis techniques, such as electrodeposition or nanoparticle colloid production.
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Affiliation(s)
- Tobias Stohr
- Department of Materials and Earth SciencesTechnische Universität Darmstadt64287DarmstadtGermany
| | - Joachim Brötz
- Department of Materials and Earth SciencesTechnische Universität Darmstadt64287DarmstadtGermany
| | - Mehtap Oezaslan
- Institute of Technical ChemistryTechnische Universität BraunschweigHagenring 3038106BraunschweigGermany
- Department of ChemistryCarl von Ossietzky University of Oldenburg26111OldenburgGermany
| | - Falk Muench
- Department of Materials and Earth SciencesTechnische Universität Darmstadt64287DarmstadtGermany
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Stohr T, Fischer A, Muench F, Antoni M, Wollstadt S, Lohaus C, Kunz U, Clemens O, Klein A, Ensinger W. Electroless Nanoplating of Pd−Pt Alloy Nanotube Networks: Catalysts with Full Compositional Control for the Methanol Oxidation Reaction. ChemElectroChem 2020. [DOI: 10.1002/celc.201901939] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tobias Stohr
- Department of Materials and Earth SciencesTechnische Universität Darmstadt Alarich-Weiß-Str. 2 64287 Darmstadt Germany
| | - Angelina Fischer
- Department of Materials and Earth SciencesTechnische Universität Darmstadt Alarich-Weiß-Str. 2 64287 Darmstadt Germany
| | - Falk Muench
- Department of Materials and Earth SciencesTechnische Universität Darmstadt Alarich-Weiß-Str. 2 64287 Darmstadt Germany
| | - Markus Antoni
- Department of Materials and Earth SciencesTechnische Universität Darmstadt Alarich-Weiß-Str. 2 64287 Darmstadt Germany
| | - Stephan Wollstadt
- Department of Materials and Earth SciencesTechnische Universität Darmstadt Alarich-Weiß-Str. 2 64287 Darmstadt Germany
| | - Christian Lohaus
- Department of Materials and Earth SciencesTechnische Universität Darmstadt Alarich-Weiß-Str. 2 64287 Darmstadt Germany
| | - Ulrike Kunz
- Department of Materials and Earth SciencesTechnische Universität Darmstadt Alarich-Weiß-Str. 2 64287 Darmstadt Germany
| | - Oliver Clemens
- Department of Materials and Earth SciencesTechnische Universität Darmstadt Alarich-Weiß-Str. 2 64287 Darmstadt Germany
| | - Andreas Klein
- Department of Materials and Earth SciencesTechnische Universität Darmstadt Alarich-Weiß-Str. 2 64287 Darmstadt Germany
| | - Wolfgang Ensinger
- Department of Materials and Earth SciencesTechnische Universität Darmstadt Alarich-Weiß-Str. 2 64287 Darmstadt Germany
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Muench F, El-Nagar GA, Tichter T, Zintler A, Kunz U, Molina-Luna L, Sikolenko V, Pasquini C, Lauermann I, Roth C. Conformal Solution Deposition of Pt-Pd Titania Nanocomposite Coatings for Light-Assisted Formic Acid Electro-Oxidation. ACS APPLIED MATERIALS & INTERFACES 2019; 11:43081-43092. [PMID: 31647212 DOI: 10.1021/acsami.9b12783] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Many nanofabrication processes require sophisticated equipment, elevated temperature, vacuum or specific atmospheric conditions, templates, and exotic chemicals, which severely hamper their implementation in real-world applications. In this study, we outline a fully wet-chemical procedure for equipping a 3D carbon felt (CF) substrate with a multifunctional, titania nanospike-supported Pt-Pd nanoparticle (Pt-Pd-TiO2@CF) layer in a facile and scalable manner. The nanostructure, composition, chemical speciation, and formation of the material was meticulously investigated, evidencing the conformal coating of the substrate with a roughened layer of nanocrystalline rutile spikes by chemical bath deposition from Ti3+ solutions. The spikes are densely covered by bimetallic nanoparticles of 4.4 ± 1.1 nm in size, which were produced by autocatalytic Pt deposition onto Pd seeds introduced by Sn2+ ionic layer adsorption and reaction. The as-synthesized nanocomposite was applied to the (photo)electro-oxidation of formic acid (FA), exhibiting a superior performance compared to Pt-plated, Pd-seeded CF (Pt-Pd@CF) and commercial Pt-C, indicating the promoting electrocatalytic role of the TiO2 support. Upon UV-Vis illumination, the performance of the Pt-Pd-TiO2@CF electrode is remarkably increased (22-fold), generating a current density of 110 mA cm-2, distinctly outperforming titania-free Pt-Pd@CF (5 mA cm-2) and commercial Pt-C (6 mA cm-2) reference catalysts. In addition, the Pt-Pd-TiO2@CF showed a much better stability, characterized by a very high poisoning tolerance for in situ-generated CO intermediates, whose formation is hindered in the presence of TiO2. This overall performance boost is attributed to a dual enhancement mechanism (∼30% electrocatalytic and ∼70% photoelectrocatalytic). The photogenerated electrons from the TiO2 conduction band enrich the electron density of the Pt nanoparticles, promoting the generation of active oxygen species on their surfaces from adsorbed oxygen and water molecules, which facilitate the direct FA electro-oxidation into CO2.
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Affiliation(s)
- Falk Muench
- Department of Materials and Earth Sciences , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
| | - Gumaa A El-Nagar
- Chemistry Department, Faculty of Science , Cairo University , Cairo 12613 , Egypt
- Helmholtz-Zentrum Berlin für Materialien und Energie , Berlin 12489 , Germany
| | | | - Alexander Zintler
- Department of Materials and Earth Sciences , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
| | - Ulrike Kunz
- Department of Materials and Earth Sciences , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
| | - Leopoldo Molina-Luna
- Department of Materials and Earth Sciences , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
| | | | | | - Iver Lauermann
- Helmholtz-Zentrum Berlin für Materialien und Energie , Berlin 12489 , Germany
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Boettcher T, Schaefer S, Antoni M, Stohr T, Kunz U, Dürrschnabel M, Molina-Luna L, Ensinger W, Muench F. Shape-Selective Electroless Plating within Expanding Template Pores: Etching-Assisted Deposition of Spiky Nickel Nanotube Networks. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:4246-4253. [PMID: 30811941 DOI: 10.1021/acs.langmuir.9b00030] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Nano-objects are favored structures for applications such as catalysis and sensing. Although they already provide a large surface-to-volume ratio, this ratio can be further increased by shape-selective plating of the nanostructure surfaces. This process combines the conformity of autocatalytic deposition with the defined nucleation and growth characteristics of colloidal nanoparticle syntheses. However, many aspects of such reactions are still not fully understood. In this study, we investigate in detail the growth of spiky nickel nanotubes in polycarbonate template membranes. One distinctive feature of our synthesis is the simultaneous growth of nanospikes on both the inside and outside of nanotubes while the tubes are still embedded in the polymer. This is achieved by combining the plating process with locally enhanced in situ etching of the poylmer template, for which we propose a theory. Electron microscopy investigations reveal twinning defects as the driving force for the growth of crystalline nanospikes. Deposit crystallinity is ensured by the reducing agent hydrazine. Iminodiacetic acid is not only used as a complexing agent during synthesis but apparently also acts as a capping agent and limits random nucleation on the spike facets. Finally, we apply our synthesis to templates with interconnected pores to obtain free-standing spiky nickel nanotube networks, demonstrating its ability to homogeneously coat substrates with extended inner surfaces and to operate in nanoscale confinement.
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Affiliation(s)
- Tim Boettcher
- Department of Materials and Geoscience , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
| | - Sandra Schaefer
- Department of Materials and Geoscience , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
- CEST Kompetenzzentrum für elektrochemische Oberflächentechnologie GmbH , Viktor-Kaplan-Straße 2 , 2700 Wiener Neustadt , Austria
| | - Markus Antoni
- Department of Materials and Geoscience , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
| | - Tobias Stohr
- Department of Materials and Geoscience , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
| | - Ulrike Kunz
- Department of Materials and Geoscience , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
| | - Michael Dürrschnabel
- Department of Materials and Geoscience , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
- Karlsruher Institut für Technologie (KIT) , Institut für Angewandte Materialien , Hermann-von-Helmholtz-Platz 1 , 76344 Eggenstein-Leopoldshafen , Germany
| | - Leopoldo Molina-Luna
- Department of Materials and Geoscience , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
| | - Wolfgang Ensinger
- Department of Materials and Geoscience , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
| | - Falk Muench
- Department of Materials and Geoscience , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
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