1
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Yang Y, Volpato GA, Rossin E, Peruffo N, Tumbarello F, Nicoletti C, Bonetto R, Paoloni L, Umari P, Colusso E, Dell'Amico L, Berardi S, Collini E, Caramori S, Agnoli S, Sartorel A. Photoelectrochemical C-H Activation Through a Quinacridone Dye Enabling Proton-Coupled Electron Transfer. ChemSusChem 2023; 16:e202201980. [PMID: 36507568 DOI: 10.1002/cssc.202201980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/30/2022] [Indexed: 06/17/2023]
Abstract
Dye-sensitized photoanodes for C-H activation in organic substrates are assembled by vacuum sublimation of a commercially available quinacridone (QNC) dye in the form of nanosized rods onto fluorine-doped tin oxide (FTO), TiO2 , and SnO2 slides. The photoanodes display extended absorption in the visible range (450-600 nm) and ultrafast photoinduced electron injection (<1 ps, as revealed by transient absorption spectroscopy) of the QNC dye into the semiconductor. The proton-coupled electron-transfer reactivity of QNC is exploited for generating a nitrogen-based radical as its oxidized form, which is competent in C-H bond activation. The key reactivity parameter is the bond-dissociation free energy (BDFE) associated with the N⋅/N-H couple in QNC of 80.5±2.3 kcal mol-1 , which enables hydrogen atom abstraction from allylic or benzylic C-H moieties. A photoelectrochemical response is indeed observed for organic substrates characterized by C-H bonds with BDFE below the 80.5 kcal mol-1 threshold, such as γ-terpinene, xanthene, or dihydroanthracene. This work provides a rational, mechanistically oriented route to the design of dye-sensitized photoelectrodes for selective organic transformations.
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Affiliation(s)
- Yunshuo Yang
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Giulia Alice Volpato
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Elena Rossin
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Nicola Peruffo
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Francesco Tumbarello
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Catia Nicoletti
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Ruggero Bonetto
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Lorenzo Paoloni
- Department of Physics and Astronomy, University of Padova, via F. Marzolo 8, 35131, Padova, Italy
| | - Paolo Umari
- Department of Physics and Astronomy, University of Padova, via F. Marzolo 8, 35131, Padova, Italy
| | - Elena Colusso
- Department of Industrial Engineering and INSTM, University of Padova, F. Marzolo 9, 35131, Padova, Italy
| | - Luca Dell'Amico
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Serena Berardi
- Department of Chemical and Pharmaceutical Sciences, Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SolarChem), Sez. di Ferrara, University of Ferrara, Via L. Borsari 46, 44121, Ferrara, Italy
| | - Elisabetta Collini
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Stefano Caramori
- Department of Chemical and Pharmaceutical Sciences, Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SolarChem), Sez. di Ferrara, University of Ferrara, Via L. Borsari 46, 44121, Ferrara, Italy
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Andrea Sartorel
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
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2
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Lunardon M, Kosmala T, Ghorbani-Asl M, Krasheninnikov AV, Kolekar S, Durante C, Batzill M, Agnoli S, Granozzi G. Catalytic Activity of Defect-Engineered Transition Me tal Dichalcogenides Mapped with Atomic-Scale Precision by Electrochemical Scanning Tunneling Microscopy. ACS Energy Lett 2023; 8:972-980. [PMID: 36816778 PMCID: PMC9926491 DOI: 10.1021/acsenergylett.2c02599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 01/03/2023] [Indexed: 06/18/2023]
Abstract
Unraveling structure-activity relationships is a key objective of catalysis. Unfortunately, the intrinsic complexity and structural heterogeneity of materials stand in the way of this goal, mainly because the activity measurements are area-averaged and therefore contain information coming from different surface sites. This limitation can be surpassed by the analysis of the noise in the current of electrochemical scanning tunneling microscopy (EC-STM). Herein, we apply this strategy to investigate the catalytic activity toward the hydrogen evolution reaction of monolayer films of MoSe2. Thanks to atomically resolved potentiodynamic experiments, we can evaluate individually the catalytic activity of the MoSe2 basal plane, selenium vacancies, and different point defects produced by the intersections of metallic twin boundaries. The activity trend deduced by EC-STM is independently confirmed by density functional theory calculations, which also indicate that, on the metallic twin boundary crossings, the hydrogen adsorption energy is almost thermoneutral. The micro- and macroscopic measurements are combined to extract the turnover frequency of different sites, obtaining for the most active ones a value of 30 s-1 at -136 mV vs RHE.
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Affiliation(s)
- Marco Lunardon
- Department
of Chemical Sciences, University of Padova, Padova 35131, Italy
| | - Tomasz Kosmala
- Department
of Chemical Sciences, University of Padova, Padova 35131, Italy
- Institute
of Experimental Physics, University of Wrocław, Wrocław 50-204, Poland
| | - Mahdi Ghorbani-Asl
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf Dresden 01328, Germany
| | - Arkady V. Krasheninnikov
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf Dresden 01328, Germany
- Department
of Applied Physics, Aalto University, 00076 Aalto, Finland
| | - Sadhu Kolekar
- Department
of Physics, University of South Florida, Tampa, Florida 33620, United States
| | - Christian Durante
- Department
of Chemical Sciences, University of Padova, Padova 35131, Italy
| | - Matthias Batzill
- Department
of Physics, University of South Florida, Tampa, Florida 33620, United States
| | - Stefano Agnoli
- Department
of Chemical Sciences, University of Padova, Padova 35131, Italy
- INSTM
Research
Unit, University of Padova, Padova 35131, Italy
| | - Gaetano Granozzi
- Department
of Chemical Sciences, University of Padova, Padova 35131, Italy
- INSTM
Research
Unit, University of Padova, Padova 35131, Italy
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3
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Salvò D, Mosconi D, Neyman A, Bar-Sadan M, Calvillo L, Granozzi G, Cattelan M, Agnoli S. Nanoneedles of Mixed Transition Metal Phosphides as Bifunctional Catalysts for Electrocatalytic Water Splitting in Alkaline Media. Nanomaterials (Basel) 2023; 13:683. [PMID: 36839051 PMCID: PMC9963911 DOI: 10.3390/nano13040683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 02/02/2023] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
In this work, mixed Ni/Co and Ni/Fe metal phosphides with different metal ratios were synthesized through the phosphidization of high-surface-area hydroxides grown hydrothermally on carbon cloth. The materials were characterized by means of X-ray photoemission spectroscopy, X-ray diffraction, energy dispersive X-ray analysis, and electron microscopies. The electrocatalytic performance in the electrochemical water splitting was tested in alkaline media. With the aim of determining the chemical stability of the mixed phosphides and the possible changes undergone under catalytic conditions, the materials were characterized before and after the electrochemical tests. The best performances in the hydrogen evolution reaction were achieved when synergic interactions are established among the metal centers, as suggested by the outstanding performances (50 mV to achieve 10 mA/cm2) of materials containing the highest amount of ternary compounds, i.e., NiCoP and NiFeP. The best performances in the oxygen evolution reaction were reached by the Ni-Fe materials. Under these conditions, it was demonstrated that a strong oxidation of the surface and the dissolution of the phosphide/phosphate component takes place, with the consequent formation of the corresponding metal oxides and hydroxides.
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Affiliation(s)
- Davide Salvò
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
- Avanzare Innovación Tecnológica S.L., Av. Lentiscares, 4-6, 26370 Navarrete, Spain
- Organometallic Molecular Materials (MATMO), Departamento de Química-Centro de Investigación en Síntesis Química (CISQ), Universidad de La Rioja, Madre de Dios, 53, 26006 Logroño, Spain
| | - Dario Mosconi
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Alevtina Neyman
- Department of Chemistry, Ben Gurion University, Beer Sheva 84105, Israel
| | - Maya Bar-Sadan
- Department of Chemistry, Ben Gurion University, Beer Sheva 84105, Israel
| | - Laura Calvillo
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Gaetano Granozzi
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Mattia Cattelan
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
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4
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Wang M, Osella S, Brescia R, Liu Z, Gallego J, Cattelan M, Crisci M, Agnoli S, Gatti T. 2D MoS 2/BiOBr van der Waals heterojunctions by liquid-phase exfoliation as photoelectrocatalysts for hydrogen evolution. Nanoscale 2023; 15:522-531. [PMID: 36511088 DOI: 10.1039/d2nr04970h] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
As a semiconductor used for the photocatalytic hydrogen evolution reaction (HER), BiOBr has received intensive attention in recent years. However, the high recombination of photoexcited charge carriers results in poor photocatalytic efficiency. The combination with other photoactive semiconductors might represent a valuable approach to deal with the intrinsic limitations of the material. Given that BiOBr has a 2D structure, we propose a simple liquid-phase exfoliation method to peel BiOBr microspheres into few-layer nanosheets. By tuning the weight ratio between the precursors, we prepare a series of 2D MoS2/BiOBr van der Waals (vdW) heterojunctions and study their behaviour as (photo)electrocatalysts for the HER, finding dramatic differences as a function of weight composition. Moreover, we found that pristine 2D BiOBr and the heterojunctions, with the exception of the 1% MoS2/BiOBr composition, undergo photocorrosion, with BiOBr being reduced to metallic Bi. These findings provide useful guidelines to design novel 2D material-based (photo)electrocatalysts for the production of sustainable fuels.
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Affiliation(s)
- Mengjiao Wang
- Institute of Physical Chemistry and Center for Materials Research (LaMa), Justus Liebig University, 35392 Giessen, Germany.
| | - Silvio Osella
- Chemical and Biological Systems Simulation Lab, Centre of New Technologies, University of Warsaw, 02097 Warsaw, Poland
| | - Rosaria Brescia
- Electron Microscopy Facility, Istituto Italiano di Tecnologia, Via Morego, 30, 16163 Genova, Italy
| | - Zheming Liu
- Nanochemistry Department, Istituto Italiano di Tecnologia, 16163 Genova, Italy
| | - Jaime Gallego
- Institute of Physical Chemistry and Center for Materials Research (LaMa), Justus Liebig University, 35392 Giessen, Germany.
| | - Mattia Cattelan
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Matteo Crisci
- Institute of Physical Chemistry and Center for Materials Research (LaMa), Justus Liebig University, 35392 Giessen, Germany.
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Teresa Gatti
- Institute of Physical Chemistry and Center for Materials Research (LaMa), Justus Liebig University, 35392 Giessen, Germany.
- Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy.
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5
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Torres-Mendieta R, Nguyen NHA, Guadagnini A, Semerad J, Łukowiec D, Parma P, Yang J, Agnoli S, Sevcu A, Cajthaml T, Cernik M, Amendola V. Growth suppression of bacteria by biofilm deterioration using silver nanoparticles with magnetic doping. Nanoscale 2022; 14:18143-18156. [PMID: 36449011 DOI: 10.1039/d2nr03902h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Decades of antibiotic use and misuse have generated selective pressure toward the rise of antibiotic-resistant bacteria, which now contaminate our environment and pose a major threat to humanity. According to the evolutionary "Red queen theory", developing new antimicrobial technologies is both urgent and mandatory. While new antibiotics and antibacterial technologies have been developed, most fail to penetrate the biofilm that protects bacteria against external antimicrobial attacks. Hence, new antimicrobial formulations should combine toxicity for bacteria, biofilm permeation ability, biofilm deterioration capability, and tolerability by the organism without renouncing compatibility with a sustainable, low-cost, and scalable production route as well as an acceptable ecological impact after the ineluctable release of the antibacterial compound in the environment. Here, we report on the use of silver nanoparticles (NPs) doped with magnetic elements (Co and Fe) that allow standard silver antibacterial agents to perforate bacterial biofilms through magnetophoretic migration upon the application of an external magnetic field. The method has been proved to be effective in opening micrometric channels and reducing the thicknesses of models of biofilms containing bacteria such as Enterococcus faecalis, Enterobacter cloacae, and Bacillus subtilis. Besides, the NPs increase the membrane lipid peroxidation biomarkers through the formation of reactive oxygen species in E. faecalis, E. cloacae, B. subtilis, and Pseudomonas putida colonies. The NPs are produced using a one-step, scalable, and environmentally low-cost procedure based on laser ablation in a liquid, allowing easy transfer to real-world applications. The antibacterial effectiveness of these magnetic silver NPs may be further optimized by engineering the external magnetic fields and surface conjugation with specific functionalities for biofilm disruption or bactericidal effectiveness.
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Affiliation(s)
- Rafael Torres-Mendieta
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentská 1402/2, 461 17 Liberec, Czech Republic.
| | - Nhung H A Nguyen
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentská 1402/2, 461 17 Liberec, Czech Republic.
| | - Andrea Guadagnini
- Department of Chemical Sciences, University of Padova, Padova, I-35131 Italy.
| | - Jaroslav Semerad
- Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, Prague 4, Czech Republic
| | - Dariusz Łukowiec
- Materials Research Laboratory, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18A St., 44-100, Gliwice, Poland
| | - Petr Parma
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentská 1402/2, 461 17 Liberec, Czech Republic.
- Faculty of Mechanical Engineering, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic
| | - Jijin Yang
- Department of Chemical Sciences, University of Padova, Padova, I-35131 Italy.
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova, Padova, I-35131 Italy.
| | - Alena Sevcu
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentská 1402/2, 461 17 Liberec, Czech Republic.
| | - Tomas Cajthaml
- Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, Prague 4, Czech Republic
| | - Miroslav Cernik
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentská 1402/2, 461 17 Liberec, Czech Republic.
| | - Vincenzo Amendola
- Department of Chemical Sciences, University of Padova, Padova, I-35131 Italy.
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6
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Pini F, Pilot R, Ischia G, Agnoli S, Amendola V. Au-Ag Alloy Nanocorals with Optimal Broadband Absorption for Sunlight-Driven Thermoplasmonic Applications. ACS Appl Mater Interfaces 2022; 14:28924-28935. [PMID: 35713483 PMCID: PMC9247974 DOI: 10.1021/acsami.2c05983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Noble metal nanoparticles are efficient converters of light into heat but typically cover a limited spectral range or have intense light scattering, resulting in unsuited for broadband thermoplasmonic applications and sunlight-driven heat generation. Here, Au-Ag alloy nanoparticles were deliberately molded with an irregular nanocoral (NC) shape to obtain broadband plasmon absorption from the visible to the near-infrared yet at a lower cost compared to pure Au nanostructures. The Au-Ag NCs are produced through a green and scalable methodology that relies on pulsed laser fragmentation in a liquid, without chemicals or capping molecules, leaving the particles surface free for conjugation with thiolated molecules and enabling full processability and easy inclusion in various matrixes. Numerical calculations showed that panchromism, i.e., the occurrence of a broadband absorption from the visible to the near-infrared region, is due to the special morphology of Au-Ag alloy NCs and consists of a purely absorptive behavior superior to monometallic Au or Ag NCs. The thermoplasmonic properties were assessed by multiwavelength light-to-heat conversion experiments and exploited for the realization of a cellulose-based solar-steam generation device with low-cost, simple design but competitive performances. Overall, here it is shown how laser light can be used to harvest solar light. Besides, the optimized broadband plasmon absorption, the green synthetic procedure, and the other set of positive features for thermoplasmonic applications of Au-Ag NCs will contribute to the development of environmentally friendly devices of practical utility in a sustainable world.
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Affiliation(s)
- Federico Pini
- Department
of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Roberto Pilot
- Department
of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
- Consorzio
INSTM, via G. Giusti
9, 50121 Firenze, Italy
| | - Gloria Ischia
- Department
of Industrial Engineering, University of
Trento, Via Sommarive 9, 38123 Trento, Italy
| | - Stefano Agnoli
- Department
of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Vincenzo Amendola
- Department
of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
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7
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Ran J, Girardi L, Dražić G, Wang Z, Agnoli S, Xia H, Granozzi G. The Effect of the 3D Nanoarchitecture and Ni-Promotion on the Hydrogen Evolution Reaction in MoS 2 /Reduced GO Aerogel Hybrid Microspheres Produced by a Simple One-Pot Electrospraying Procedure. Small 2022; 18:e2105694. [PMID: 35253364 DOI: 10.1002/smll.202105694] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 01/23/2022] [Indexed: 06/14/2023]
Abstract
The transition toward renewable energy sources requires low-cost, efficient, and durable electrocatalysts for green H2 production. Herein, an easy and highly scalable method to prepare MoS2 nanoparticles embedded in 3D partially reduced (pr) graphene oxide (GO) aerogel microspheres (MoS2 /prGOAMs) with controlled morphology and composition is described. Given their peculiar center-diverging mesoporous structure, which allows easy access to the active sites and optimal mass transport, and their efficient electron transfer facilitated by the intimate contact between the MoS2 and the 3D connected highly conductive pr-GO sheets, these materials exhibit a remarkable electrocatalytic activity in the hydrogen evolution reaction (HER). Ni atoms, either as single Ni atoms or NiO aggregates are then introduced in the MoS2 /prGOAMs hybrids, to facilitate water dissociation, which is the slowest step in alkaline HER, producing a bifunctional catalyst. After optimization, Ni-promoted MoS2 /prGOAMs obtained at 500 °C reach a remarkable η10 (overpotential at 10 mA cm-2 ) of 160 mV in 1 m KOH and 174 mV in 0.5 m H2 SO4 . Moreover, after chronopotentiometry tests (15 h) at a current density of 10 mA cm-2 , the η10 value improves to 147 mV in alkaline conditions, indicating an exceptional stability.
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Affiliation(s)
- Jiajia Ran
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, Padova, 35131, Italy
| | - Leonardo Girardi
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, Padova, 35131, Italy
| | - Goran Dražić
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, Ljubljana, 1001, Slovenia
| | - Zhanhua Wang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, Padova, 35131, Italy
| | - Hesheng Xia
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Gaetano Granozzi
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, Padova, 35131, Italy
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8
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Vilé G, Di Liberto G, Tosoni S, Sivo A, Ruta V, Nachtegaal M, Clark AH, Agnoli S, Zou Y, Savateev A, Antonietti M, Pacchioni G. Azide-Alkyne Click Chemistry over a Heterogeneous Copper-Based Single-Atom Catalyst. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05610] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Gianvito Vilé
- Department of Chemistry, Materials, and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Giovanni Di Liberto
- Department of Materials Science, University of Milano-Bicocca, Via Roberto Cozzi 55, 20125 Milano, Italy
| | - Sergio Tosoni
- Department of Materials Science, University of Milano-Bicocca, Via Roberto Cozzi 55, 20125 Milano, Italy
| | - Alessandra Sivo
- Department of Chemistry, Materials, and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Vincenzo Ruta
- Department of Chemistry, Materials, and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Maarten Nachtegaal
- Paul Scherrer Institute, Forschingsstrasse 111, 5232 Villigen, Switzerland
| | - Adam H. Clark
- Paul Scherrer Institute, Forschingsstrasse 111, 5232 Villigen, Switzerland
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
| | - Yajun Zou
- Department of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, Potsdam-Golm Science Park, Am Muehlenberg 1 OT, Golm, Potsdam 14476, Germany
| | - Aleksandr Savateev
- Department of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, Potsdam-Golm Science Park, Am Muehlenberg 1 OT, Golm, Potsdam 14476, Germany
| | - Markus Antonietti
- Department of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, Potsdam-Golm Science Park, Am Muehlenberg 1 OT, Golm, Potsdam 14476, Germany
| | - Gianfranco Pacchioni
- Department of Materials Science, University of Milano-Bicocca, Via Roberto Cozzi 55, 20125 Milano, Italy
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9
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Affiliation(s)
- Matías Blanco
- Organic Chemistry Department Universidad Autónoma de Madrid. C/ Francisco Tomás y Valiente 7 28049 Madrid Spain
| | - Stefano Agnoli
- Department of Chemical Sciences University of Padova Via Marzolo 1 I-35131 Padova Italy
| | - Gaetano Granozzi
- Department of Chemical Sciences University of Padova Via Marzolo 1 I-35131 Padova Italy
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10
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Valle-Amores MA, Blanco M, Agnoli S, Fraile A, Alemán J. Oxidized Multiwalled Nanotubes as Efficient Carbocatalyst for the General Synthesis of Azines. J Catal 2022. [DOI: 10.1016/j.jcat.2022.01.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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11
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Blanco M, Cembellín S, Agnoli S, Alemán J. Ruthenium‐
p‐
cymene Complex Side‐Wall Covalently Bonded to Carbon Nanotubes as Efficient Hybrid Transfer Hydrogenation Catalyst. ChemCatChem 2021. [DOI: 10.1002/cctc.202101442] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Matías Blanco
- Department of Organic Chemistry Universidad Autónoma de Madrid C/ Francisco Tomás y Valiente 7 Madrid 28049 Spain
| | - Sara Cembellín
- Organic Chemistry Department. Faculty of Chemistry.. Universidad Complutense de Madrid Avenida Complutense s/n 28040 Madrid Spain
| | - Stefano Agnoli
- Department of Chemical Sciences Interuniversitario Reattività Chimica e Catalisi-CIRCC University of Padova Via Marzolo, 1 Padova 35131 Italy
| | - José Alemán
- Department of Organic Chemistry Universidad Autónoma de Madrid C/ Francisco Tomás y Valiente 7 Madrid 28049 Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid C/ Francisco Tomás y Valiente 7 28049 Madrid Spain
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12
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Kosmala T, Baby A, Lunardon M, Perilli D, Liu H, Durante C, Di Valentin C, Agnoli S, Granozzi G. Operando visualization of the hydrogen evolution reaction with atomic-scale precision at different metal–graphene interfaces. Nat Catal 2021. [DOI: 10.1038/s41929-021-00682-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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13
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Volpato GA, Colusso E, Paoloni L, Forchetta M, Sgarbossa F, Cristino V, Lunardon M, Berardi S, Caramori S, Agnoli S, Sabuzi F, Umari P, Martucci A, Galloni P, Sartorel A. Artificial photosynthesis: photoanodes based on polyquinoid dyes onto mesoporous tin oxide surface. Photochem Photobiol Sci 2021; 20:1243-1255. [PMID: 34570354 DOI: 10.1007/s43630-021-00097-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 08/30/2021] [Indexed: 12/27/2022]
Abstract
Dye-sensitized photoelectrochemical cells represent an appealing solution for artificial photosynthesis, aimed at the conversion of solar light into fuels or commodity chemicals. Extensive efforts have been directed towards the development of photoelectrodes combining semiconductor materials and organic dyes; the use of molecular components allows to tune the absorption and redox properties of the material. Recently, we have reported the use of a class of pentacyclic quinoid organic dyes (KuQuinone) chemisorbed onto semiconducting tin oxide as photoanodes for water oxidation. In this work, we investigate the effect of the SnO2 semiconductor thickness and morphology and of the dye-anchoring group on the photoelectrochemical performance of the electrodes. The optimized materials are mesoporous SnO2 layers with 2.5 μm film thickness combined with a KuQuinone dye with a 3-carboxylpropyl-anchoring chain: these electrodes achieve light-harvesting efficiency of 93% at the maximum absorption wavelength of 533 nm, and photocurrent density J up to 350 μA/cm2 in the photoelectrochemical oxidation of ascorbate, although with a limited incident photon-to-current efficiency of 0.075%. Calculations based on the density functional theory (DFT) support the role of the reduced species of the KuQuinone dye via a proton-coupled electron transfer as the competent species involved in the electron transfer to the tin oxide semiconductor. Finally, a preliminary investigation of the photoelectrodes towards benzyl alcohol oxidation is presented, achieving photocurrent density up to 90 μA/cm2 in acetonitrile in the presence of N-hydroxysuccinimide and pyridine as redox mediator and base, respectively. These results support the possibility of using molecular-based materials in synthetic photoelectrochemistry.
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Affiliation(s)
- Giulia Alice Volpato
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131, Padua, Italy
| | - Elena Colusso
- Department of Industrial Engineering and INSTM, University of Padova, F. Marzolo 9, 35131, Padua, Italy
| | - Lorenzo Paoloni
- Department of Physics and Astronomy, University of Padova, Via F. Marzolo 8, 35131, Padua, Italy
| | - Mattia Forchetta
- Department of Chemical Science and Technologies, University of Rome "Tor Vergata", Via della Ricerca Scientifica, snc, 00133, Rome, Italy
| | - Francesco Sgarbossa
- Department of Physics and Astronomy, University of Padova, Via F. Marzolo 8, 35131, Padua, Italy
| | - Vito Cristino
- Department of Chemical and Pharmaceutical Sciences, Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SolarChem), Sez. di Ferrara, University of Ferrara, Via L. Borsari 46, 44121, Ferrara, Italy
| | - Marco Lunardon
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131, Padua, Italy
| | - Serena Berardi
- Department of Chemical and Pharmaceutical Sciences, Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SolarChem), Sez. di Ferrara, University of Ferrara, Via L. Borsari 46, 44121, Ferrara, Italy
| | - Stefano Caramori
- Department of Chemical and Pharmaceutical Sciences, Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SolarChem), Sez. di Ferrara, University of Ferrara, Via L. Borsari 46, 44121, Ferrara, Italy
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131, Padua, Italy
| | - Federica Sabuzi
- Department of Chemical Science and Technologies, University of Rome "Tor Vergata", Via della Ricerca Scientifica, snc, 00133, Rome, Italy
| | - Paolo Umari
- Department of Physics and Astronomy, University of Padova, Via F. Marzolo 8, 35131, Padua, Italy.
| | - Alessandro Martucci
- Department of Industrial Engineering and INSTM, University of Padova, F. Marzolo 9, 35131, Padua, Italy.
| | - Pierluca Galloni
- Department of Chemical Science and Technologies, University of Rome "Tor Vergata", Via della Ricerca Scientifica, snc, 00133, Rome, Italy.
| | - Andrea Sartorel
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131, Padua, Italy.
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14
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Guadagnini A, Agnoli S, Badocco D, Pastore P, Pilot R, Ravelle-Chapuis R, van Raap MBF, Amendola V. Kinetically Stable Nonequilibrium Gold-Cobalt Alloy Nanoparticles with Magnetic and Plasmonic Properties Obtained by Laser Ablation in Liquid. Chemphyschem 2021; 22:657-664. [PMID: 33559943 DOI: 10.1002/cphc.202100021] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/08/2021] [Indexed: 12/21/2022]
Abstract
Nonequilibrium nanoalloys are metastable solids obtained at the nanoscale under nonequilibrium conditions that allow the study of kinetically frozen atoms and the discovery of new physical and chemical properties. However, the stabilization of metastable phases in the nanometric size regime is challenging and the synthetic route should be easy and sustainable, for the nonequilibrium nanoalloys to be practically available. Here we report on the one-step laser ablation synthesis in solution (LASiS) of nonequilibrium Au-Co alloy nanoparticles (NPs) and their characterization on ensembles and at the single nanoparticle level. The NPs are obtained as a polycrystalline solid solution stable in air and water, although surface cobalt atoms undergo oxidation to Co(II). Since gold is a renowned plasmonic material and metallic cobalt is ferromagnetic at room temperature, these properties are both found in the NPs. Besides, surface conjugation with thiolated molecules is possible and it was exploited to obtain colloidally stable solutions in water. Taking advantage of these features, an array of magnetic-plasmonic dots was obtained and used for surface-enhanced Raman scattering experiments. Overall, this study confirms that LASiS is an effective method for the formation of kinetically stable nonequilibrium nanoalloys and shows that Au-Co alloy NPs are appealing magnetically responsive plasmonic building blocks for several nanotechnological applications.
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Affiliation(s)
- Andrea Guadagnini
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131, Padova, Italy
| | - Stefano Agnoli
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131, Padova, Italy
| | - Denis Badocco
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131, Padova, Italy
| | - Paolo Pastore
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131, Padova, Italy
| | - Roberto Pilot
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131, Padova, Italy.,Consorzio INSTM, UdR Padova, Italy
| | | | - Marcela B Fernández van Raap
- Physics Institute of La Plata (IFLP-CONICET), Physics Department Faculty of Exact Sciences, National University of La Plata, La Plata, Argentina
| | - Vincenzo Amendola
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131, Padova, Italy
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15
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Amendola V, Guadagnini A, Agnoli S, Badocco D, Pastore P, Fracasso G, Gerosa M, Vurro F, Busato A, Marzola P. Polymer-coated silver-iron nanoparticles as efficient and biodegradable MRI contrast agents. J Colloid Interface Sci 2021; 596:332-341. [PMID: 33839358 DOI: 10.1016/j.jcis.2021.03.096] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 02/24/2021] [Accepted: 03/15/2021] [Indexed: 12/22/2022]
Abstract
Bimetallic nanoparticles allow new and synergistic properties compared to the monometallic equivalents, often leading to unexpected results. Here we present on silver-iron nanoparticles coated with polyethylene glycol, which exhibit a high transverse relaxivity (316 ± 13 mM-1s-1, > 3 times that of the most common clinical benchmark based on iron oxide), excellent colloidal stability and biocompatibility in vivo. Ag-Fe nanoparticles are obtained through a one-step, low-cost laser-assisted synthesis, which makes surface functionalization with the desired biomolecules very easy. Besides, Ag-Fe nanoparticles show biodegradation over a few months, as indicated by incubation in the physiological environment. This is crucial for nanomaterials removal from the living organism and, in fact, in vivo biodistribution studies evidenced that Ag-Fe nanoparticles tend to be cleared from liver over a period in which the benchmark iron oxide contrast agent persisted. Therefore, the Ag-Fe NPs offer positive prospects for solving the problems of biopersistence, contrast efficiency, difficulties of synthesis and surface functionalization usually encountered in nanoparticulate contrast agents.
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Affiliation(s)
- Vincenzo Amendola
- Department of Chemical Sciences, University of Padova, Padova I-35131, Italy.
| | - Andrea Guadagnini
- Department of Chemical Sciences, University of Padova, Padova I-35131, Italy
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova, Padova I-35131, Italy
| | - Denis Badocco
- Department of Chemical Sciences, University of Padova, Padova I-35131, Italy
| | - Paolo Pastore
- Department of Chemical Sciences, University of Padova, Padova I-35131, Italy
| | | | - Marco Gerosa
- Department of Computer Science, University of Verona, Verona 37134, Italy
| | - Federica Vurro
- Department of Computer Science, University of Verona, Verona 37134, Italy
| | - Alice Busato
- Department of Computer Science, University of Verona, Verona 37134, Italy
| | - Pasquina Marzola
- Department of Computer Science, University of Verona, Verona 37134, Italy.
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16
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Kosmala T, Bardini L, Caporali M, Serrano-Ruiz M, Sedona F, Agnoli S, Peruzzini M, Granozzi G. Interfacial chemistry and electroactivity of black phosphorus decorated with transition metals. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01097a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Black phosphorus (BP) exhibits a significant chemical reactivity toward transition metals at room temperature, forming metal–BP nanohybrids that have much higher catalytic activity in the hydrogen evolution reaction with respect to the bare BP.
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Affiliation(s)
- Tomasz Kosmala
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | - Luca Bardini
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | - Maria Caporali
- Istituto di Chimica del Composti Organometallici
- Consiglio Nazionale delle Ricerche (CNR–ICCOM)
- 50019 Sesto Fiorentino
- Italy
| | - Manuel Serrano-Ruiz
- Istituto di Chimica del Composti Organometallici
- Consiglio Nazionale delle Ricerche (CNR–ICCOM)
- 50019 Sesto Fiorentino
- Italy
| | - Francesco Sedona
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | - Stefano Agnoli
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | - Maurizio Peruzzini
- Istituto di Chimica del Composti Organometallici
- Consiglio Nazionale delle Ricerche (CNR–ICCOM)
- 50019 Sesto Fiorentino
- Italy
| | - Gaetano Granozzi
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
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17
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Tang P, Paganelli S, Carraro F, Blanco M, Riccò R, Marega C, Badocco D, Pastore P, Doonan CJ, Agnoli S. Postsynthetic Metalated MOFs as Atomically Dispersed Catalysts for Hydroformylation Reactions. ACS Appl Mater Interfaces 2020; 12:54798-54805. [PMID: 33232111 DOI: 10.1021/acsami.0c17073] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A manganese-based metal-organic framework with dipyrazole ligands has been metalated with atomically dispersed Rh and Co species and used as a catalyst for the hydroformylation of styrene. The Rh-based materials exhibited excellent conversion at 80 °C with complete chemoselectivity, high selectivity for the branched aldehyde, high recyclability, and negligible metal leaching.
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Affiliation(s)
- Panjuan Tang
- Department of Chemical Sciences and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
| | - Stefano Paganelli
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, Via Torino 155, 30172 Venezia Mestre, Italy
| | - Francesco Carraro
- Department of Chemical Sciences and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
- Institute of Physical and Theoretical Chemistry, Graz University of Technology, Graz 8010, Austria
| | - Matias Blanco
- Department of Chemical Sciences and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
| | - Raffaele Riccò
- Institute of Physical and Theoretical Chemistry, Graz University of Technology, Graz 8010, Austria
| | - Carla Marega
- Department of Chemical Sciences and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
| | - Denis Badocco
- Department of Chemical Sciences and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
| | - Paolo Pastore
- Department of Chemical Sciences and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
| | - Christian J Doonan
- Department of Chemistry, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Stefano Agnoli
- Department of Chemical Sciences and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
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18
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Lunardon M, Ran J, Mosconi D, Marega C, Wang Z, Xia H, Agnoli S, Granozzi G. Hybrid Transition Metal Dichalcogenide/Graphene Microspheres for Hydrogen Evolution Reaction. Nanomaterials (Basel) 2020; 10:nano10122376. [PMID: 33260654 PMCID: PMC7759811 DOI: 10.3390/nano10122376] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/24/2020] [Accepted: 11/27/2020] [Indexed: 11/17/2022]
Abstract
A peculiar 3D graphene-based architecture, i.e., partial reduced-Graphene Oxide Aerogel Microspheres (prGOAM), having a dandelion-like morphology with divergent microchannels to implement innovative electrocatalysts for the hydrogen evolution reaction (HER) is investigated in this paper. prGOAM was used as a scaffold to incorporate exfoliated transition metals dichalcogenide (TMDC) nanosheets, and the final hybrid materials have been tested for HER and photo-enhanced HER. The aim was to create a hybrid material where electronic contacts among the two pristine materials are established in a 3D architecture, which might increase the final HER activity while maintaining accessible the TMDC catalytic sites. The adopted bottom-up approach, based on combining electrospraying with freeze-casting techniques, successfully provides a route to prepare TMDC/prGOAM hybrid systems where the dandelion-like morphology is retained. Interestingly, the microspherical morphology is also maintained in the tested electrode and after the electrocatalytic experiments, as demonstrated by scanning electron microscopy images. Comparing the HER activity of the TMDC/prGOAM hybrid systems with that of TMDC/partially reduced-Graphene Oxide (prGO) and TMDC/Vulcan was evidenced in the role of the divergent microchannels present in the 3D architecture. HER photoelectron catalytic (PEC) tests have been carried out and demonstrated an interesting increase in HER performance.
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Affiliation(s)
- Marco Lunardon
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy; (M.L.); (J.R.); (D.M.); (C.M.); (S.A.)
| | - JiaJia Ran
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy; (M.L.); (J.R.); (D.M.); (C.M.); (S.A.)
| | - Dario Mosconi
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy; (M.L.); (J.R.); (D.M.); (C.M.); (S.A.)
| | - Carla Marega
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy; (M.L.); (J.R.); (D.M.); (C.M.); (S.A.)
| | - Zhanhua Wang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China; (Z.W.); (H.X.)
| | - Hesheng Xia
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China; (Z.W.); (H.X.)
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy; (M.L.); (J.R.); (D.M.); (C.M.); (S.A.)
| | - Gaetano Granozzi
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy; (M.L.); (J.R.); (D.M.); (C.M.); (S.A.)
- Correspondence: ; Tel.: +39-3347151920
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19
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Colusso E, Tancon M, Cazzola L, Parin R, Agnoli S, De Boni F, Pelizzo MG, Della Gaspera E, Del Col D, Martucci A. Solution‐processed graphene oxide coatings for enhanced heat transfer during dropwise condensation of steam. Nano Select 2020. [DOI: 10.1002/nano.202000105] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Elena Colusso
- Department of Industrial Engineering University of Padova Via Marzolo, 9 Padova 35131 Italy
| | - Marco Tancon
- Department of Industrial Engineering University of Padova Via Marzolo, 9 Padova 35131 Italy
| | - Lorenzo Cazzola
- Department of Industrial Engineering University of Padova Via Marzolo, 9 Padova 35131 Italy
| | - Riccardo Parin
- Department of Industrial Engineering University of Padova Via Marzolo, 9 Padova 35131 Italy
| | - Stefano Agnoli
- Department of Chemical Sciences University of Padova Via Marzolo, 1 Padova 35131 Italy
| | - Francesco De Boni
- Department of Chemical Sciences University of Padova Via Marzolo, 1 Padova 35131 Italy
| | - Maria Guglielmina Pelizzo
- Consiglio Nazionale delle Ricerche Istituto di Fotonica e Nanotecnologie via Trasea 7 Padova 35131 Italy
| | | | - Davide Del Col
- Department of Industrial Engineering University of Padova Via Marzolo, 9 Padova 35131 Italy
| | - Alessandro Martucci
- Department of Industrial Engineering University of Padova Via Marzolo, 9 Padova 35131 Italy
- INSTM Padova University unit Via Marzolo, 9 Padova 35131 Italy
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20
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Mosconi D, Kosmala T, Lunardon M, Neyman A, Bar-Sadan M, Agnoli S, Granozzi G. One-pot synthesis of MoS 2(1-x)Se 2x on N-doped reduced graphene oxide: tailoring chemical and structural properties for photoenhanced hydrogen evolution reaction. Nanoscale Adv 2020; 2:4830-4840. [PMID: 36132882 PMCID: PMC9419742 DOI: 10.1039/d0na00375a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 08/28/2020] [Indexed: 06/16/2023]
Abstract
In this work we designed a one-pot solvothermal synthesis of MoS2(1-x)Se2x nanosheets directly grown on N-doped reduced graphene oxide (hereafter N-rGO). We optimized the synthesis conditions to control the Se : S ratio, with the aim of tailoring the optoelectronic properties of the resulting nanocomposites for their use as electro- and photoelectro-catalysts in the hydrogen evolution reaction (HER). The synthesis protocol made use of ammonium tetrathiomolybdate (ATM) as MoS2 precursor and dimethyl diselenide (DMDSe) as selenizing agent. By optimizing growth conditions and post-annealing treatments, we produced either partially amorphous or highly crystalline chalcogen-defective electrocatalysts. All samples were tested for the HER in acidic environment, and the best performing among them, for the photoassisted HER. In low crystallinity samples, the introduction of Se is not beneficial for promoting the catalytic activity, and MoS2/N-rGO was the most active electrocatalyst. On the other hand, after the post-annealing treatment and the consequent crystallization of the materials, the best HER performance was obtained for the sample with x = 0.38, which also showed the highest enhancement upon light irradiation.
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Affiliation(s)
- Dario Mosconi
- Dipartimento di Scienze Chimiche, Università di Padova Via Marzolo 1 35131 Padova Italy
| | - Tomasz Kosmala
- Dipartimento di Scienze Chimiche, Università di Padova Via Marzolo 1 35131 Padova Italy
| | - Marco Lunardon
- Dipartimento di Scienze Chimiche, Università di Padova Via Marzolo 1 35131 Padova Italy
| | - Alevtina Neyman
- Department of Chemistry, Ben-Gurion University of the Negev Beer-Sheva Israel
| | - Maya Bar-Sadan
- Department of Chemistry, Ben-Gurion University of the Negev Beer-Sheva Israel
| | - Stefano Agnoli
- Dipartimento di Scienze Chimiche, Università di Padova Via Marzolo 1 35131 Padova Italy
| | - Gaetano Granozzi
- Dipartimento di Scienze Chimiche, Università di Padova Via Marzolo 1 35131 Padova Italy
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21
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Peralta RA, Huxley MT, Evans JD, Fallon T, Cao H, He M, Zhao XS, Agnoli S, Sumby CJ, Doonan CJ. Highly Active Gas Phase Organometallic Catalysis Supported Within Metal-Organic Framework Pores. J Am Chem Soc 2020; 142:13533-13543. [PMID: 32650640 DOI: 10.1021/jacs.0c05286] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Metal-organic frameworks (MOFs) can act as a platform for the heterogenization of molecular catalysts, providing improved stability, allowing easy catalyst recovery and a route toward structural elucidation of the active catalyst. We have developed a MOF, 1, possessing vacant N,N-chelating sites which are accessible via the porous channels that penetrate the structure. In the present work, cationic rhodium(I) norbornadiene (NBD) and bis(ethylene) (ETH) complexes paired with both noncoordinating and coordinating anions have been incorporated into the N,N-chelation sites of 1 via postsynthetic metalation and facile anion exchange. Exploiting the crystallinity of the host framework, the immobilized Rh(I) complexes were structurally characterized using X-ray crystallography. Ethylene hydrogenation catalysis by 1·[Rh(NBD)]X and 1·[Rh(ETH)2]X (X = Cl and BF4) was studied in the gas phase (2 bar, 46 °C) to reveal that 1·[Rh(ETH)2](BF4) was the most active catalyst (TOF = 64 h-1); the NBD materials and the chloride salt were notably less active. On the basis of these observations, the activity of the Rh(I) bis(ethylene) complexes, 1·[Rh(ETH)2]BF4 and 1·[Rh(ETH)2]Cl, in butene isomerization was also studied using gas-phase NMR spectroscopy. Under one bar of butene at 46 °C, 1·[Rh(ETH)2]BF4 rapidly catalyzes the conversion of 1-butene to 2-butene with a TOF averaging 2000 h-1 over five cycles. Notably, the chloride derivative, 1 [Rh(ETH)2]Cl displays negligible activity in comparison. XPS analysis of the postcatalysis sample, supported by DFT calculations, suggest that the catalytic activity is inhibited by the strong interactions between a Rh(III) allyl hydride intermediate and the chloride anion.
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Affiliation(s)
- Ricardo A Peralta
- Centre for Advanced Nanomaterials and Department of Chemistry, The University of Adelaide, North Terrace, Adelaide, South Australia 5000, Australia
| | - Michael T Huxley
- Centre for Advanced Nanomaterials and Department of Chemistry, The University of Adelaide, North Terrace, Adelaide, South Australia 5000, Australia
| | - Jack D Evans
- Department of Inorganic Chemistry, Technische Universität Dresden, Bergstraße 66, 01062 Dresden, Germany
| | - Thomas Fallon
- Centre for Advanced Nanomaterials and Department of Chemistry, The University of Adelaide, North Terrace, Adelaide, South Australia 5000, Australia
| | - Haijie Cao
- Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, PR China
| | - Maoxia He
- Environment Research Institute, Shandong University, Qingdao 266237, PR China
| | - Xiu Song Zhao
- Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, PR China.,School of Chemical Engineering, The University of Queensland, St Lucia,Brisbane 4072, Australia
| | - Stefano Agnoli
- Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Christopher J Sumby
- Centre for Advanced Nanomaterials and Department of Chemistry, The University of Adelaide, North Terrace, Adelaide, South Australia 5000, Australia
| | - Christian J Doonan
- Centre for Advanced Nanomaterials and Department of Chemistry, The University of Adelaide, North Terrace, Adelaide, South Australia 5000, Australia
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22
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Girardi L, Blanco M, Agnoli S, Rizzi GA, Granozzi G. A DVD-MoS 2/Ag 2S/Ag Nanocomposite Thiol-Conjugated with Porphyrins for an Enhanced Light-Mediated Hydrogen Evolution Reaction. Nanomaterials (Basel) 2020; 10:nano10071266. [PMID: 32610453 PMCID: PMC7408523 DOI: 10.3390/nano10071266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/18/2020] [Accepted: 06/25/2020] [Indexed: 11/16/2022]
Abstract
We have recently demonstrated in a previous work an appreciable photoelectrocatalytic (PEC) behavior towards hydrogen evolution reaction (HER) of a MoS2/Ag2S/Ag nanocomposite electrochemically deposited on a commercial writable Digital Versatile Disc (DVD), consisting therefore on an interesting strategy to convert a common waster product in an added-value material. Herein, we present the conjugation of this MoS2/Ag2S/Ag-DVD nanocomposite with thiol-terminated tetraphenylporphyrins, taking advantage of the grafting of thiol groups through covalent S-S bridges, for integrating the well-known porphyrins photoactivity into the nanocomposite. Moreover, we employ two thiol-terminated porphyrins with different hydrophilicity, demonstrating that they either suppress or improve the PEC-HER performance of the overall hybrid, as a function of the molecule polarity, sustaining the concept of a local proton relay. Actually, the active polar porphyrin-MoS2/Ag2S/Ag-DVD hybrid material presented, when illuminated, a better HER performance, compared to the pristine nanocomposite, since the porphyrin may inject photoelectrons in the conduction band of the semiconductors at the formed heterojunction, presenting also a stable operational behavior during overnight chopped light chronoamperometric measurement, thanks to the robust bond created.
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Affiliation(s)
- Leonardo Girardi
- Department of Chemical Sciences and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy; (L.G.); (S.A.); (G.G.)
| | - Matías Blanco
- Department of Chemical Sciences and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy; (L.G.); (S.A.); (G.G.)
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Ciudad Universitaria de Cantoblanco, Calle Francisco Tomás y Valiente, 7, 28049 Madrid, Spain
- Correspondence: (M.B.); (G.A.R.); Tel.: +34-914975022 (M.B.); +39-0498275722 (G.A.R.)
| | - Stefano Agnoli
- Department of Chemical Sciences and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy; (L.G.); (S.A.); (G.G.)
| | - Gian Andrea Rizzi
- Department of Chemical Sciences and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy; (L.G.); (S.A.); (G.G.)
- Correspondence: (M.B.); (G.A.R.); Tel.: +34-914975022 (M.B.); +39-0498275722 (G.A.R.)
| | - Gaetano Granozzi
- Department of Chemical Sciences and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy; (L.G.); (S.A.); (G.G.)
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23
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Zhao T, Kumar A, Xiong X, Ma M, Wang Y, Zhang Y, Agnoli S, Zhang G, Sun X. Assisting Atomic Dispersion of Fe in N-Doped Carbon by Aerosil for High-Efficiency Oxygen Reduction. ACS Appl Mater Interfaces 2020; 12:25832-25842. [PMID: 32407066 DOI: 10.1021/acsami.0c04169] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Utilizing Zn as a "fencing" agent has enabled the pyrolytic synthesis of atomically dispersed metal-nitrogen-carbon (AD-MNC) materials for broad electrocatalysis such as fuel cells, metal-air batteries, and water electrolyzers. Yet the Zn residue troubles the precise identification of the responsible sites in active service. Herein we developed a simple aerosil-assisted method for preparing AD-MNC materials to cautiously avoid the introduction of Zn. The combined analysis of extended X-ray absorption fine structure (EXAFS) and aberration-corrected high-resolution transition electron microscopy verified the atomic dispersion of Fe species in the as-made Fe-NC sample with a well-defined structure of Fe-N4. Besides, the EXAFS studies indicated the formation of oxygenated Fe-N4 moieties (O-Fe-N4) after the removal of aerosil nanoparticles. Therefore, the immobilization of Fe atoms in the carbon substrate was attributed to the heavily doping N and rich oxygen dangling species at the aerosil surface. Electrochemical measurements revealed that the as-made Fe-NC material furnished with O-Fe-N4 moieties exhibited excellent oxygen reduction reaction (ORR) performance, characterized by individually indicating ∼22 mV higher half-wave potentials, with respect to commercial Pt/C catalyst. Density functional theory (DFT) computations suggested that the dangling oxygen ligand on the Fe-N4 moiety could significantly boost the cleavage of OOH* and the reductive release of *OH intermediates, leading to the enhancement of overall ORR performance.
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Affiliation(s)
- Tete Zhao
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, Shandong 266580, P.R. China
| | - Anuj Kumar
- Department of Chemistry, Institute of Humanities and Applied Science, GLA University, Mathura 281406, India
| | - Xuya Xiong
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000 Aarhus C, Denmark
| | - Mang Ma
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, Shandong 266580, P.R. China
| | - Yiyan Wang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, Shandong 266580, P.R. China
| | - Ying Zhang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, Shandong 266580, P.R. China
| | - Stefano Agnoli
- Department of Chemistry Science, University of Padova, Via Marzolo 1, I-35131 Padova, Italy
| | - Guoxin Zhang
- Department of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao, Shandong 266590, P.R. China
| | - Xiaoming Sun
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, Shandong 266580, P.R. China
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
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24
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Kosmala T, Bibent N, Sougrati MT, Dražić G, Agnoli S, Jaouen F, Granozzi G. Stable, Active, and Methanol-Tolerant PGM-Free Surfaces in an Acidic Medium: Electron Tunneling at Play in Pt/FeNC Hybrid Catalysts for Direct Methanol Fuel Cell Cathodes. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01288] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Tomasz Kosmala
- Department of Chemical Sciences, University of Padua, Via Marzolo 1, 35131 Padova, Italy
| | - Nicolas Bibent
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | | | - Goran Dražić
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, 1001 Ljubljana, Slovenia
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padua, Via Marzolo 1, 35131 Padova, Italy
| | | | - Gaetano Granozzi
- Department of Chemical Sciences, University of Padua, Via Marzolo 1, 35131 Padova, Italy
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25
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Reuillard B, Blanco M, Calvillo L, Coutard N, Ghedjatti A, Chenevier P, Agnoli S, Otyepka M, Granozzi G, Artero V. Noncovalent Integration of a Bioinspired Ni Catalyst to Graphene Acid for Reversible Electrocatalytic Hydrogen Oxidation. ACS Appl Mater Interfaces 2020; 12:5805-5811. [PMID: 31912737 PMCID: PMC7009173 DOI: 10.1021/acsami.9b18922] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 01/07/2020] [Indexed: 06/10/2023]
Abstract
Efficient heterogeneous catalysis of hydrogen oxidation reaction (HOR) by platinum group metal (PGM)-free catalysts in proton-exchange membrane (PEM) fuel cells represents a significant challenge toward the development of a sustainable hydrogen economy. Here, we show that graphene acid (GA) can be used as an electrode scaffold for the noncovalent immobilization of a bioinspired nickel bis-diphosphine HOR catalyst. The highly functionalized structure of this material and optimization of the electrode-catalyst assembly sets new benchmark electrocatalytic performances for heterogeneous molecular HOR, with current densities above 30 mA cm-2 at 0.4 V versus reversible hydrogen electrode in acidic aqueous conditions and at room temperature. This study also shows the great potential of GA for catalyst loading improvement and porosity management within nanostructured electrodes toward achieving high current densities with a noble-metal free molecular catalyst.
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Affiliation(s)
- Bertrand Reuillard
- Univ. Grenoble
Alpes, CEA, CNRS, IRIG, Laboratoire de Chimie et Biologie des Métaux, F-38000 Grenoble, France
| | - Matías Blanco
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Laura Calvillo
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Nathan Coutard
- Univ. Grenoble
Alpes, CEA, CNRS, IRIG, Laboratoire de Chimie et Biologie des Métaux, F-38000 Grenoble, France
| | - Ahmed Ghedjatti
- Univ. Grenoble
Alpes, CEA, CNRS, IRIG, Laboratoire de Chimie et Biologie des Métaux, F-38000 Grenoble, France
| | - Pascale Chenevier
- Univ. Grenoble Alpes, CEA,
CNRS, IRIG, SYMMES, F-38000 Grenoble, France
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Michal Otyepka
- Regional Centre
of Advanced Technologies and Materials, Department of Physical Chemistry, Palacký University Olomouc, 17. listopadu 1192/12, 771 46 Olomouc, Czech Republic
| | - Gaetano Granozzi
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Vincent Artero
- Univ. Grenoble
Alpes, CEA, CNRS, IRIG, Laboratoire de Chimie et Biologie des Métaux, F-38000 Grenoble, France
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26
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Polliotto V, Albanese E, Livraghi S, Agnoli S, Pacchioni G, Giamello E. Structural, electronic and photochemical properties of cerium-doped zirconium titanate. Catal Today 2020. [DOI: 10.1016/j.cattod.2018.09.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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27
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Blanco M, Mosconi D, Otyepka M, Medveď M, Bakandritsos A, Agnoli S, Granozzi G. Combined high degree of carboxylation and electronic conduction in graphene acid sets new limits for metal free catalysis in alcohol oxidation. Chem Sci 2019; 10:9438-9445. [PMID: 32055319 PMCID: PMC6991185 DOI: 10.1039/c9sc02954k] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Accepted: 09/06/2019] [Indexed: 01/03/2023] Open
Abstract
Graphene oxide, the most prominent carbocatalyst for several oxidation reactions, has severe limitations due to the overstoichiometric amounts required to achieve practical conversions. Graphene acid, a well-defined graphene derivative selectively and homogeneously covered by carboxylic groups but maintaining the high electronic conductivity of pristine graphene, sets new activity limits in the selective and general oxidation of a large gamut of alcohols, even working at 5 wt% loading for at least 10 reaction cycles without any influence from metal impurities. According to experimental data and first principles calculations, the selective and dense functionalization with carboxyl groups, combined with excellent electron transfer properties, accounts for the unprecedented catalytic activity of this graphene derivative. Moreover, the controlled structure of graphene acid allows shedding light upon the critical steps of the reaction and regulating precisely its selectivity toward different oxidation products.
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Affiliation(s)
- Matías Blanco
- Department of Chemical Sciences , INSTM Unit , University of Padova , Via F. Marzolo 1 , 35131 , Padova , Italy . ;
| | - Dario Mosconi
- Department of Chemical Sciences , INSTM Unit , University of Padova , Via F. Marzolo 1 , 35131 , Padova , Italy . ;
| | - Michal Otyepka
- Regional Centre for Advanced Technologies and Materials , Faculty of Science , Palacký University Olomouc , Šlechtitelů 27 , 771 46 Olomouc , Czech Republic
- Department of Physical Chemistry , Faculty of Science , Palacký University Olomouc , 17. listopadu 1192/12 , 771 46 Olomouc , Czech Republic
| | - Miroslav Medveď
- Regional Centre for Advanced Technologies and Materials , Faculty of Science , Palacký University Olomouc , Šlechtitelů 27 , 771 46 Olomouc , Czech Republic
| | - Aristides Bakandritsos
- Regional Centre for Advanced Technologies and Materials , Faculty of Science , Palacký University Olomouc , Šlechtitelů 27 , 771 46 Olomouc , Czech Republic
| | - Stefano Agnoli
- Department of Chemical Sciences , INSTM Unit , University of Padova , Via F. Marzolo 1 , 35131 , Padova , Italy . ;
| | - Gaetano Granozzi
- Department of Chemical Sciences , INSTM Unit , University of Padova , Via F. Marzolo 1 , 35131 , Padova , Italy . ;
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28
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Volpato GA, Muneton Arboleda D, Brandiele R, Carraro F, Sartori GB, Cardelli A, Badocco D, Pastore P, Agnoli S, Durante C, Amendola V, Sartorel A. Clean rhodium nanoparticles prepared by laser ablation in liquid for high performance electrocatalysis of the hydrogen evolution reaction. Nanoscale Adv 2019; 1:4296-4300. [PMID: 36134415 PMCID: PMC9417491 DOI: 10.1039/c9na00510b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Accepted: 10/16/2019] [Indexed: 05/20/2023]
Abstract
Rhodium nanoparticles (NPs) were prepared by a one-step, green and facile procedure consisting in laser ablation of a bulk Rh target immersed in pure water (W-Rh-NPs) or ethanol (E-Rh-NPs). When embedded in mesoporous carbon based inks, both W-Rh-NPs and E-Rh-NPs show excellent activity towards the hydrogen evolution reaction in acidic media, operating close to the thermodynamic potential with 85-97% faradaic yields and low Tafel slopes of 50-54 mV per decade in the low overpotential region (η < 20 mV). A superior activity of W-Rh-NPs with respect to E-Rh-NPs is ascribed to the absence of surface carbon reducible species derived from the synthesis in organic solvent, and thus confirms the importance of the use of water as the preferred medium for laser synthesis of clean nanocrystals in liquid environment. These results provide an important contribution to the impelling need for the preparation of nano-catalysts based on energy critical materials by clean, sustainable and low cost routes.
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Affiliation(s)
- Giulia Alice Volpato
- Department of Chemical Sciences, University of Padova via Marzolo 1 35131 Padova Italy
| | - David Muneton Arboleda
- Centro de Investigaciones Ópticas CIOp (CONICET-CIC-UNLP), Facultad de Ingeniería UNLP La Plata Argentina
| | - Riccardo Brandiele
- Department of Chemical Sciences, University of Padova via Marzolo 1 35131 Padova Italy
| | - Francesco Carraro
- Department of Chemical Sciences, University of Padova via Marzolo 1 35131 Padova Italy
| | | | - Andrea Cardelli
- Department of Chemical Sciences, University of Padova via Marzolo 1 35131 Padova Italy
| | - Denis Badocco
- Department of Chemical Sciences, University of Padova via Marzolo 1 35131 Padova Italy
| | - Paolo Pastore
- Department of Chemical Sciences, University of Padova via Marzolo 1 35131 Padova Italy
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova via Marzolo 1 35131 Padova Italy
| | - Christian Durante
- Department of Chemical Sciences, University of Padova via Marzolo 1 35131 Padova Italy
| | - Vincenzo Amendola
- Department of Chemical Sciences, University of Padova via Marzolo 1 35131 Padova Italy
| | - Andrea Sartorel
- Department of Chemical Sciences, University of Padova via Marzolo 1 35131 Padova Italy
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29
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Mosconi D, Giovannini G, Maccaferri N, Serri M, Agnoli S, Garoli D. Electrophoretic Deposition of WS 2 Flakes on Nanoholes Arrays-Role of Used Suspension Medium. Materials (Basel) 2019; 12:ma12203286. [PMID: 31658603 PMCID: PMC6829434 DOI: 10.3390/ma12203286] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 10/05/2019] [Accepted: 10/08/2019] [Indexed: 12/16/2022]
Abstract
Here we optimized the electrophoretic deposition process for the fabrication of WS2 plasmonic nanohole integrated structures. We showed how the conditions used for site-selective deposition influenced the properties of the deposited flakes. In particular, we investigated the effect of different suspension buffers used during the deposition both in the efficiency of the process and in the stability of WS2 flakes, which were deposited on an ordered arrays of plasmonic nanostructures. We observed that a proper buffer can significantly facilitate the deposition process, keeping the material stable with respect to oxidation and contamination. Moreover, the integrated plasmonic structures that can be prepared with this process can be applied to enhanced spectroscopies and for the preparation of 2D nanopores.
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Affiliation(s)
- Dario Mosconi
- Dipartimento di Chimica, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy.
| | | | - Nicolò Maccaferri
- Physics and Materials Science Research Unit, University of Luxembourg, L-1511 Luxembourg, Luxembourg.
| | - Michele Serri
- Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy.
| | - Stefano Agnoli
- Dipartimento di Chimica, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy.
| | - Denis Garoli
- Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy.
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30
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Alexander DTL, Forrer D, Rossi E, Lidorikis E, Agnoli S, Bernasconi GD, Butet J, Martin OJF, Amendola V. Electronic Structure-Dependent Surface Plasmon Resonance in Single Au-Fe Nanoalloys. Nano Lett 2019; 19:5754-5761. [PMID: 31348861 DOI: 10.1021/acs.nanolett.9b02396] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The relationship between composition and plasmonic properties in noble metal nanoalloys is still largely unexplored. Yet, nanoalloys of noble metals, such as gold, with transition elements, such as iron, have unique properties and a number of potential applications, ranging from nanomedicine to magneto-plasmonics and plasmon-enhanced catalysis. Here, we investigate the localized surface plasmon resonance at the level of the single Au-Fe nanoparticle by applying a strategy that combines experimental measurements using near field electron energy loss spectroscopy with theoretical studies via a full wave numerical analysis and density functional theory calculations of electronic structure. We show that, as the iron fraction increases, the plasmon resonance is blue-shifted and significantly damped, as a consequence of the changes in the electronic band structure of the alloy. This allows the identification of three relevant phenomena to be considered in the design and realization of any plasmonic nanoalloy, specifically: the appearance of new states around the Fermi level; the change in the free electron density of the metal; and the blue shift of interband transitions. Overall, this study provides new opportunities for the control of the optical response in Au-Fe and other plasmonic nanoalloys, which are useful for the realization of magneto-plasmonic devices for molecular sensing, thermo-plasmonics, bioimaging, photocatalysis, and the amplification of spectroscopic signals by local field enhancement.
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Affiliation(s)
- Duncan T L Alexander
- Electron Spectrometry and Microscopy Laboratory (LSME), Institute of Physics (IPHYS) , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland
- Interdisciplinary Centre for Electron Microscopy (CIME) , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland
| | - Daniel Forrer
- CNR-ICMATE , 35127 Padova , Italy
- Department of Chemical Sciences , University of Padova , 35131 Padova , Italy
| | - Enrico Rossi
- Department of Chemical Sciences , University of Padova , 35131 Padova , Italy
| | - Elefterios Lidorikis
- Department Materials Science and Engineering , University of Ioannina , 45110 Ioannina , Greece
| | - Stefano Agnoli
- Department of Chemical Sciences , University of Padova , 35131 Padova , Italy
| | - Gabriel D Bernasconi
- Nanophotonics and Metrology Laboratory (NAM) , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland
| | - Jérémy Butet
- Nanophotonics and Metrology Laboratory (NAM) , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland
| | - Olivier J F Martin
- Nanophotonics and Metrology Laboratory (NAM) , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland
| | - Vincenzo Amendola
- Department of Chemical Sciences , University of Padova , 35131 Padova , Italy
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31
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Mosconi D, Giovannini G, Jacassi A, Ponzellini P, Maccaferri N, Vavassori P, Serri M, Dipalo M, Darvill D, De Angelis F, Agnoli S, Garoli D. Site-Selective Integration of MoS 2 Flakes on Nanopores by Means of Electrophoretic Deposition. ACS Omega 2019; 4:9294-9300. [PMID: 31460018 PMCID: PMC6648040 DOI: 10.1021/acsomega.9b00965] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 05/17/2019] [Indexed: 06/10/2023]
Abstract
Here, we propose an easy method for site-selective deposition of two-dimensional (2D) material flakes onto nanoholes by means of electrophoretic deposition. This method can be applied to both simple flat nanostructures and complex three-dimensional structures incorporating nanoholes. The deposition method is here used for the decoration of large ordered arrays of plasmonic structures with either a single or few layers of MoS2. In principle, the plasmonic field generated by the nanohole can significantly interact with the 2D layer leading to enhanced light-material interaction. This makes our platform an ideal system for hybrid 2D material/plasmonic investigations. The engineered deposition of 2D materials on plasmonic nanostructures is useful for several important applications such as enhanced light emission, strong coupling, hot-electron generation, and 2D material sensors.
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Affiliation(s)
- Dario Mosconi
- Dipartimento
di Chimica, Università degli Studi
di Padova, Via Marzolo 1, 35131 Padova, Italy
| | | | - Andrea Jacassi
- Istituto
Italiano di Tecnologia, Via Morego, 30, I-16163 Genova, Italy
| | - Paolo Ponzellini
- Istituto
Italiano di Tecnologia, Via Morego, 30, I-16163 Genova, Italy
| | - Nicolò Maccaferri
- Istituto
Italiano di Tecnologia, Via Morego, 30, I-16163 Genova, Italy
- Physics
and Materials Science Research Unit, University
of Luxembourg, L-1511 Luxembourg, Luxembourg
| | - Paolo Vavassori
- CIC
nanoGUNE, Tolosa Hiribidea,
76, E-20018 Donostia-San
Sebastian, Spain
| | - Michele Serri
- Istituto
Italiano di Tecnologia, Via Morego, 30, I-16163 Genova, Italy
| | - Michele Dipalo
- Istituto
Italiano di Tecnologia, Via Morego, 30, I-16163 Genova, Italy
| | - Daniel Darvill
- Istituto
Italiano di Tecnologia, Via Morego, 30, I-16163 Genova, Italy
| | | | - Stefano Agnoli
- Dipartimento
di Chimica, Università degli Studi
di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Denis Garoli
- Istituto
Italiano di Tecnologia, Via Morego, 30, I-16163 Genova, Italy
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32
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Achilli S, Cavaliere E, Nguyen TH, Cattelan M, Agnoli S. Growth and electronic structure of 2D hexagonal nanosheets on a corrugated rectangular substrate. Nanotechnology 2018; 29:485201. [PMID: 30192742 DOI: 10.1088/1361-6528/aadfd2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Graphene and h-BN are grown by chemical vapor deposition in ultra high vacuum conditions on the Pt(110) surface. Scanning tunneling microscopy measurements and low-energy electron diffraction data indicate that graphene forms a variety of differently oriented incommensurate domains although with a strong preference to align its [Formula: see text] direction with the [Formula: see text] direction of Pt. Meanwhile, h-BN exhibits a c(8 × 10) commensurate superstructure, which presents a high level of defectivity that implies local variation of the periodicity (i.e. mixed c(8 × 10) and c(8 × 12) patches) and the introduction of local defects. The combination of advanced photoemission spectroscopy data (angle-resolved photoemission spectroscopy from the valence band) and ab initio calculations indicates that both 2D materials interact weakly with the substrate: graphene exhibits neutral doping and is morphologically flat, even if it nucleates on the relatively highly corrugated rectangular (110) surface. In the case of h-BN, the interaction is slightly stronger and is characterized by a small electron transfer from surface Pt atoms to nitrogen atoms. The (110) termination of Pt is therefore a quite interesting surface for the growth of 2D materials because given its low symmetry, it may favor the growth of selectively oriented domains but does not affect their pristine electronic properties.
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Affiliation(s)
- Simona Achilli
- Department of Physics, European Theoretical Spectroscopy Facility (ETSF), University of Milano, Via Celoria 16, 20133 Milano, Italy
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33
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Agnoli S. Front Cover: Interfacial Chemistry of Low‐Dimensional Systems for Applications in Nanocatalysis (Eur. J. Inorg. Chem. 39/2018). Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Stefano Agnoli
- Department of Chemical Sciences and INSTM Research Unit University of Padova Via F. Marzolo 1 35131 Padova Italy
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34
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Agnoli S. Interfacial Chemistry of Low‐Dimensional Systems for Applications in Nanocatalysis. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Stefano Agnoli
- Department of Chemical Sciences and INSTM Research Unit University of Padova Via F. Marzolo 1 35131 Padova Italy
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35
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Garoli D, Mosconi D, Miele E, Maccaferri N, Ardini M, Giovannini G, Dipalo M, Agnoli S, De Angelis F. Hybrid plasmonic nanostructures based on controlled integration of MoS 2 flakes on metallic nanoholes. Nanoscale 2018; 10:17105-17111. [PMID: 30179242 DOI: 10.1039/c8nr05026k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Here, we propose an easy and robust strategy for the versatile preparation of hybrid plasmonic nanopores by means of controlled deposition of single flakes of MoS2 directly on top of metallic holes. The device is realized on silicon nitride membranes and can be further refined by TEM or FIB milling to achieve the passing of molecules or nanometric particles through a pore. Importantly, we show that the plasmonic enhancement provided by the nanohole is strongly accumulated in the 2D nanopore, thus representing an ideal system for single-molecule sensing and sequencing in a flow-through configuration. Here, we also demonstrate that the prepared 2D material can be decorated with metallic nanoparticles that can couple their resonance with the nanopore resonance to further enhance the electromagnetic field confinement at the nanoscale level. This method can be applied to any gold nanopore with a high level of reproducibility and parallelization; hence, it can pave the way to the next generation of solid-state nanopores with plasmonic functionalities. Moreover, the controlled/ordered integration of 2D materials on plasmonic nanostructures opens a pathway towards new investigation of the following: enhanced light emission; strong coupling from plasmonic hybrid structures; hot electron generation; and sensors in general based on 2D materials.
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Affiliation(s)
- Denis Garoli
- Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.
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36
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Affiliation(s)
- Stefano Agnoli
- Department of Chemical Sciences and INSTM Research Unit University of Padova Via F. Marzolo 1 35131 Padova Italy
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37
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Agnoli S, Batzill M. Fundamentals of chemical functionalities at oxide interfaces. J Phys Condens Matter 2018; 30:170301. [PMID: 29557792 DOI: 10.1088/1361-648x/aab816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- Stefano Agnoli
- University of Padova, Padova, Italy. University of South Florida, Tampa, FL, United States of America
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38
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Rüdiger C, Favaro M, Valero-Vidal C, Calvillo L, Bozzolo N, Jacomet S, Hein J, Gregoratti L, Agnoli S, Granozzi G, Kunze-Liebhäuser J. Erratum: Substrate Grain-Dependent Chemistry of Carburized Planar Anodic TiO 2 on Polycrystalline Ti. ACS Omega 2018; 3:3076-3078. [PMID: 31465005 PMCID: PMC6641381 DOI: 10.1021/acsomega.7b01972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Indexed: 06/10/2023]
Abstract
[This corrects the article DOI: 10.1021/acsomega.6b00472.].
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39
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Fracasso G, Ghigna P, Nodari L, Agnoli S, Badocco D, Pastore P, Nicolato E, Marzola P, Mihajlović D, Markovic M, Čolić M, Amendola V. Nanoaggregates of iron poly-oxo-clusters obtained by laser ablation in aqueous solution of phosphonates. J Colloid Interface Sci 2018; 522:208-216. [PMID: 29604440 DOI: 10.1016/j.jcis.2018.03.065] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 02/20/2018] [Accepted: 03/19/2018] [Indexed: 10/17/2022]
Abstract
Laser ablation in liquid (LAL) emerged as a versatile technique for the synthesis of nanoparticles with various structures and compositions, although the control over products remains challenging in most cases. For instance, it is still difficult to drive the size of metal oxide crystalline domains down to the level of few atom clusters with LAL. Here we demonstrate that laser ablation of a bulk iron target in aqueous solution of phosphonates gives phosphonate-grafted iron oxo-clusters polymerized into nanoaggregates with Fe:ligand ratio of 2:1, instead of the usual nanocrystalline iron oxides. We attribute this result to the strong ability of phosphonate groups to bind iron oxide clusters and prevent their further growth into crystalline iron oxide. These laser generated poly-oxo-clusters are biocompatible and trackable by magnetic resonance imaging, providing interesting features for use in biological environments, such as nano-vehicles for iron administration. Besides, this method is promising for the generation of atom-scale metal-oxide clusters, which are ubiquitary in chemistry and of interest in biochemistry, catalysis, molecular magnetism and materials science.
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Affiliation(s)
- Giulio Fracasso
- Department of Medicine, Immunology Section, University of Verona, Verona, Italy
| | - Paolo Ghigna
- Department of Chemistry, University of Pavia, Pavia, Italy
| | | | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova, Padova, Italy
| | - Denis Badocco
- Department of Chemical Sciences, University of Padova, Padova, Italy
| | - Paolo Pastore
- Department of Chemical Sciences, University of Padova, Padova, Italy
| | - Elena Nicolato
- Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Pasquina Marzola
- Department of Computer Sciences, University of Verona, Verona, Italy
| | - Dušan Mihajlović
- University of Belgrade, Institute for Application of Nuclear Energy, Zemun, Serbia
| | - Milan Markovic
- University of Belgrade, Institute for Application of Nuclear Energy, Zemun, Serbia
| | - Miodrag Čolić
- University of Belgrade, Institute for Application of Nuclear Energy, Zemun, Serbia; University of Defence in Belgrade, Medical Faculty of the Military Medical Academy, Belgrade, Serbia
| | - Vincenzo Amendola
- Department of Chemical Sciences, University of Padova, Padova, Italy.
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40
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Kosmala T, Calvillo L, Agnoli S, Granozzi G. Enhancing the Oxygen Electroreduction Activity through Electron Tunnelling: CoOx Ultrathin Films on Pd(100). ACS Catal 2018. [DOI: 10.1021/acscatal.7b02690] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tomasz Kosmala
- Department of Chemical Sciences
and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
| | - Laura Calvillo
- Department of Chemical Sciences
and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
| | - Stefano Agnoli
- Department of Chemical Sciences
and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
| | - Gaetano Granozzi
- Department of Chemical Sciences
and INSTM Unit, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
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41
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Livraghi S, Barbero N, Agnoli S, Barolo C, Granozzi G, Sauvage F, Giamello E. A multi-technique comparison of the electronic properties of pristine and nitrogen-doped polycrystalline SnO2. Phys Chem Chem Phys 2018; 18:22617-27. [PMID: 27477515 DOI: 10.1039/c6cp02822e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nitrogen doped tin(iv) oxide (SnO2) materials in the form of nanometric powders have been prepared by precipitation with ammonia. Their properties have been compared with those of undoped materials obtained in a similar way using various physical techniques such as photoelectron spectroscopies (XPS and UPS), UV-Vis-NIR spectroscopy and electron paramagnetic resonance (EPR). Nitrogen doping leads to the formation of various nitrogen containing species, the more relevant of which is a nitride-type ionic species, based on the substitution of a lattice oxygen atom with a nitrogen atom. This species exists in two forms, paramagnetic (hole centre, formally N(2-)) and diamagnetic (N(3-)). The mutual ratio of the two species varies according to the oxidation state of the material. The doped solid, like most of the semiconducting oxides, tends to lose oxygen forming oxygen vacancies upon annealing under vacuum and leaving an excess of electrons in the solid. The stoichiometry of the solid can thus be markedly changed depending on the external conditions. Excess electrons are present both as itinerant electrons in the conduction band and as Sn(ii) states lying close to the valence band maximum. The presence of nitride-type centres, which are low energy states located below the top of the valence band, decreases the energy cost for the formation of oxygen vacancies by O2 release from the lattice. This particular feature of the doped system represents a severe limit to the preparation of a p-type SnO2via nitrogen doping.
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Affiliation(s)
- S Livraghi
- Dipartimento di Chimica, Università di Torino and NIS, Centre for Nanostructured Interfaces and Surfaces, Via P. Giuria 7, I - 10125 Torino, Italy
| | - N Barbero
- Dipartimento di Chimica, Università di Torino and NIS, Centre for Nanostructured Interfaces and Surfaces, Via P. Giuria 7, I - 10125 Torino, Italy and Laboratoire de Réactivité et Chimie des Solides, Université de Picardie Jules Verne, CNRS UMR 7314, 33 rue Saint Leu, 80039 Amiens, France
| | - S Agnoli
- Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - C Barolo
- Dipartimento di Chimica, Università di Torino and NIS, Centre for Nanostructured Interfaces and Surfaces, Via P. Giuria 7, I - 10125 Torino, Italy
| | - G Granozzi
- Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - F Sauvage
- Laboratoire de Réactivité et Chimie des Solides, Université de Picardie Jules Verne, CNRS UMR 7314, 33 rue Saint Leu, 80039 Amiens, France
| | - E Giamello
- Dipartimento di Chimica, Università di Torino and NIS, Centre for Nanostructured Interfaces and Surfaces, Via P. Giuria 7, I - 10125 Torino, Italy
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42
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Rüdiger C, Valero-Vidal C, Favaro M, Agnoli S, Granozzi G, Kunze-Liebhäuser J. Effect of Air-Aging on the Electrochemical Characteristics of TiO
x
C
y
Films for Electrocatalysis Applications. ChemElectroChem 2017. [DOI: 10.1002/celc.201700912] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Celine Rüdiger
- Physik-Department; Technische Universität München; James-Franck-Str. 1 85748 Garching Germany
| | - Carlos Valero-Vidal
- Physik-Department; Technische Universität München; James-Franck-Str. 1 85748 Garching Germany
- Institut für Physikalische Chemie; Leopold-Franzens-Universität Innsbruck; Innrain 52c 6020 Innsbruck Austria
- Advanced Light Source (ALS) and; Joint Center for Energy Storage Research (JCESR), Lawrence Berkeley National Laboratory; 1 Cyclotron Road Berkeley CA 94720 United States
| | - Marco Favaro
- Dipartimento di Scienze Chimiche; Università di Padova Via Marzolo 1 35131 Padova Italy
- Helmholtz-Zentrum Berlin (HZB); Institute for Solar Fuels; Hahn-Meitner-Platz 1 14109 Berlin Germany
| | - Stefano Agnoli
- Dipartimento di Scienze Chimiche; Università di Padova Via Marzolo 1 35131 Padova Italy
| | - Gaetano Granozzi
- Dipartimento di Scienze Chimiche; Università di Padova Via Marzolo 1 35131 Padova Italy
| | - Julia Kunze-Liebhäuser
- Institut für Physikalische Chemie; Leopold-Franzens-Universität Innsbruck; Innrain 52c 6020 Innsbruck Austria
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43
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Sekar P, Calvillo L, Tubaro C, Baron M, Pokle A, Carraro F, Martucci A, Agnoli S. Cobalt Spinel Nanocubes on N-Doped Graphene: A Synergistic Hybrid Electrocatalyst for the Highly Selective Reduction of Carbon Dioxide to Formic Acid. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02166] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Pandiaraj Sekar
- Department
of Chemical Science, University of Padova, Via F. Marzolo 1 35131 Padova, Italy
| | - Laura Calvillo
- Department
of Chemical Science, University of Padova, Via F. Marzolo 1 35131 Padova, Italy
| | - Cristina Tubaro
- Department
of Chemical Science, University of Padova, Via F. Marzolo 1 35131 Padova, Italy
| | - Marco Baron
- Department
of Chemical Science, University of Padova, Via F. Marzolo 1 35131 Padova, Italy
| | - Anuj Pokle
- School
of Physics and CRANN, Trinity College Dublin, Dublin 2, Ireland
| | - Francesco Carraro
- Department
of Chemical Science, University of Padova, Via F. Marzolo 1 35131 Padova, Italy
| | - Alex Martucci
- Department
of Industrial Engineering, University of Padova, via F. Marzolo
9, 35131 Padova, Italy
| | - Stefano Agnoli
- Department
of Chemical Science, University of Padova, Via F. Marzolo 1 35131 Padova, Italy
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44
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Zheng J, Calvillo L, Valero-Vidal C, Marega C, Sekar P, Shuang S, Girardi L, Agnoli S, Rizzi GA, Granozzi G. Ag-Vanadates/GO Nanocomposites by Aerosol-Assisted Spray Pyrolysis: Preparation and Structural and Electrochemical Characterization of a Versatile Material. ACS Omega 2017; 2:2792-2802. [PMID: 31457617 PMCID: PMC6641075 DOI: 10.1021/acsomega.7b00178] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 06/12/2017] [Indexed: 06/10/2023]
Abstract
In this article, we describe the deposition by aerosol-assisted spray pyrolysis of different types of silver vanadate nanocomposites with and without graphene oxide (GO) on different substrates (carbon paper (CP) and fluorine-doped tin oxide (FTO)). When deposited on CP, different amounts of GO were added to the Ag and V precursor solution to study the effect of GO on the physicochemical properties of the resulting Ag-vanadate. It is shown that the addition of GO leads mainly to the formation of nanoparticles of the Ag2V4O11 phase, whereas Ag2V4O11 and Ag3VO4 are obtained without the addition of GO. The morphology and chemical properties of the composites were determined by scanning and transmission electron microscopies, X-ray diffraction, X-ray photoemission spectroscopy, and UV-visible and Raman spectroscopies. In addition, the photoelectrochemical (PEC) properties of such composites were studied by CV, linear sweep voltammetry, and electrochemical impedance spectroscopy. The ideal Ag x VO y and GO ratio was optimized for obtaining higher photocurrent values and a good stability. The results showed that the presence of GO improves the electrical conductivity of the catalyst layer as well as the electron injection from the oxide to the electrode surface. The deposition of pure Ag2V4O11 on FTO does not lead to samples with stable PEC performances. Samples grown on CP supports showed an efficient electrochemical detection of small amounts of ethylenediamine in water solution.
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Affiliation(s)
- Jian Zheng
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Laura Calvillo
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Carlos Valero-Vidal
- Advanced
Light Source (ALS), Joint Center for Energy Storage Research (JCESR), Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94729, United States
| | - Carla Marega
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Pandiaraj Sekar
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Shuang Shuang
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
- State
Key Laboratory of New Ceramics and Fine Processing, School of Materials
Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Leonardo Girardi
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Stefano Agnoli
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Gian Andrea Rizzi
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Gaetano Granozzi
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via Marzolo 1, 35131 Padova, Italy
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45
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Affiliation(s)
- Stefania Solmi
- “Toso Montanari” Industrial Chemistry Department; University of Bologna; Viale Risorgimento 4 40136 Bologna Italy
- Consorzio INSTM, Research Unit of Bologna; Via G. Giusti 9 50121 Florence Italy
| | - Calogero Morreale
- “Toso Montanari” Industrial Chemistry Department; University of Bologna; Viale Risorgimento 4 40136 Bologna Italy
- Consorzio INSTM, Research Unit of Bologna; Via G. Giusti 9 50121 Florence Italy
| | - Francesca Ospitali
- “Toso Montanari” Industrial Chemistry Department; University of Bologna; Viale Risorgimento 4 40136 Bologna Italy
| | - Stefano Agnoli
- Department of Chemical Sciences; University of Padova; Via F. Marzolo 1 35131 Padova Italy
| | - Fabrizio Cavani
- “Toso Montanari” Industrial Chemistry Department; University of Bologna; Viale Risorgimento 4 40136 Bologna Italy
- Consorzio INSTM, Research Unit of Bologna; Via G. Giusti 9 50121 Florence Italy
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46
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Righetto M, Privitera A, Fortunati I, Mosconi D, Zerbetto M, Curri ML, Corricelli M, Moretto A, Agnoli S, Franco L, Bozio R, Ferrante C. Spectroscopic Insights into Carbon Dot Systems. J Phys Chem Lett 2017; 8:2236-2242. [PMID: 28471190 DOI: 10.1021/acs.jpclett.7b00794] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The controversial nature of the fluorescent properties of carbon dots (CDs), ascribed either to surface states or to small molecules adsorbed onto the carbon nanostructures, is an unresolved issue. To date, an accurate picture of CDs and an exhaustive structure-property correlation are still lacking. Using two unconventional spectroscopic techniques, fluorescence correlation spectroscopy (FCS) and time-resolved electron paramagnetic resonance (TREPR), we contribute to fill this gap. Although electron micrographs indicate the presence of carbon cores, FCS reveals that the emission properties of CDs are based neither on those cores nor on molecular species linked to them, but rather on free molecules. TREPR provides deeper insights into the structure of carbon cores, where C sp2 domains are embedded within C sp3 scaffolds. FCS and TREPR prove to be powerful techniques, characterizing CDs as inherently heterogeneous systems, providing insights into the nature of such systems and paving the way to standardization of these nanomaterials.
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Affiliation(s)
- Marcello Righetto
- Department of Chemical Science and U.R. INSTM, University of Padova , Via Marzolo 1, I-35131 Padova, Italy
| | - Alberto Privitera
- Department of Chemical Science and U.R. INSTM, University of Padova , Via Marzolo 1, I-35131 Padova, Italy
| | - Ilaria Fortunati
- Department of Chemical Science and U.R. INSTM, University of Padova , Via Marzolo 1, I-35131 Padova, Italy
| | - Dario Mosconi
- Department of Chemical Science and U.R. INSTM, University of Padova , Via Marzolo 1, I-35131 Padova, Italy
| | - Mirco Zerbetto
- Department of Chemical Science and U.R. INSTM, University of Padova , Via Marzolo 1, I-35131 Padova, Italy
| | - M Lucia Curri
- CNR-IPCF-Bari Division, c/o Chemistry Department, University of Bari Aldo Moro , Via Orabona 4, I-70126 Bari, Italy
| | - Michela Corricelli
- CNR-IPCF-Bari Division, c/o Chemistry Department, University of Bari Aldo Moro , Via Orabona 4, I-70126 Bari, Italy
| | - Alessandro Moretto
- Department of Chemical Science and U.R. INSTM, University of Padova , Via Marzolo 1, I-35131 Padova, Italy
| | - Stefano Agnoli
- Department of Chemical Science and U.R. INSTM, University of Padova , Via Marzolo 1, I-35131 Padova, Italy
| | - Lorenzo Franco
- Department of Chemical Science and U.R. INSTM, University of Padova , Via Marzolo 1, I-35131 Padova, Italy
| | - Renato Bozio
- Department of Chemical Science and U.R. INSTM, University of Padova , Via Marzolo 1, I-35131 Padova, Italy
| | - Camilla Ferrante
- Department of Chemical Science and U.R. INSTM, University of Padova , Via Marzolo 1, I-35131 Padova, Italy
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47
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Rüdiger C, Favaro M, Valero-Vidal C, Calvillo L, Bozzolo N, Jacomet S, Hein J, Gregoratti L, Agnoli S, Granozzi G, Kunze-Liebhäuser J. Substrate Grain-Dependent Chemistry of Carburized Planar Anodic TiO 2 on Polycrystalline Ti. ACS Omega 2017; 2:631-640. [PMID: 31457460 PMCID: PMC6641173 DOI: 10.1021/acsomega.6b00472] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 01/27/2017] [Indexed: 06/10/2023]
Abstract
Mixtures or composites of titania and carbon have gained considerable research interest as innovative catalyst supports for low- and intermediate-temperature proton-exchange membrane fuel cells. For applications in electrocatalysis, variations in the local physicochemical properties of the employed materials can have significant effects on their behavior as catalyst supports. To assess microscopic heterogeneities in composition, structure, and morphology, a microscopic multitechnique approach is required. In this work, compact anodic TiO2 films on planar polycrystalline Ti substrates are converted into carbon/titania composites or multiphase titanium oxycarbides through carbothermal treatment in an acetylene/argon atmosphere in a flow reactor. The local chemical composition, structure, and morphology of the converted films are studied with scanning photoelectron microscopy, micro-Raman spectroscopy, and scanning electron microscopy and are related with the crystallographic orientations of the Ti substrate grains by means of electron backscatter diffraction. Different annealing temperatures, ranging from 550 to 850 °C, are found to yield different substrate grain-dependent chemical compositions, structures, and morphologies. The present study reveals individual time scales for the carbothermal conversion and subsequent surface re-oxidation on substrate grains of a given orientation. Furthermore, it demonstrates the power of a microscopic multitechnique approach for studying polycrystalline heterogeneous materials for electrocatalytic applications.
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Affiliation(s)
- Celine Rüdiger
- Physik-Department, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
| | - Marco Favaro
- Dipartimento
di Scienze Chimiche, Università di
Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Carlos Valero-Vidal
- Institut
für Physikalische Chemie, Leopold-Franzens-Universität
Innsbruck, Innrain 52c, 6020 Innsbruck, Austria
| | - Laura Calvillo
- Dipartimento
di Scienze Chimiche, Università di
Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Nathalie Bozzolo
- CEMEF
- Centre de Mise en Forme des Matériaux, MINES ParisTech,
PSL Research University, CNRS UMR 7635, CS 10207 Rue Claude Daunesse, 06904 Sophia Antipolis Cedex, France
| | - Suzanne Jacomet
- CEMEF
- Centre de Mise en Forme des Matériaux, MINES ParisTech,
PSL Research University, CNRS UMR 7635, CS 10207 Rue Claude Daunesse, 06904 Sophia Antipolis Cedex, France
| | - Jennifer Hein
- Lehrstuhl
für Technische Chemie II, Technische
Universität München, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Luca Gregoratti
- Elettra
− Sincrotrone Trieste SCpA, SS14-Km163.5 in Area Science Park, 34149 Trieste, Italy
| | - Stefano Agnoli
- Dipartimento
di Scienze Chimiche, Università di
Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Gaetano Granozzi
- Dipartimento
di Scienze Chimiche, Università di
Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Julia Kunze-Liebhäuser
- Institut
für Physikalische Chemie, Leopold-Franzens-Universität
Innsbruck, Innrain 52c, 6020 Innsbruck, Austria
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48
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Michieli N, Pilot R, Russo V, Scian C, Todescato F, Signorini R, Agnoli S, Cesca T, Bozio R, Mattei G. Oxidation effects on the SERS response of silver nanoprism arrays. RSC Adv 2017. [DOI: 10.1039/c6ra26307k] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Oxidation effects on SERS response of Ag nanoprism arrays are interpreted by FEM simulations of the local-field distribution around the nanoprisms.
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Affiliation(s)
- Niccolò Michieli
- Physics and Astronomy Department
- University of Padova
- I-35131 Padova
- Italy
| | - Roberto Pilot
- Department of Chemical Sciences and INSTM Research Unit
- University of Padova
- I-35131 Padova
- Italy
| | - Valentina Russo
- Physics and Astronomy Department
- University of Padova
- I-35131 Padova
- Italy
| | - Carlo Scian
- Physics and Astronomy Department
- University of Padova
- I-35131 Padova
- Italy
| | - Francesco Todescato
- Department of Chemical Sciences and INSTM Research Unit
- University of Padova
- I-35131 Padova
- Italy
| | - Raffaella Signorini
- Department of Chemical Sciences and INSTM Research Unit
- University of Padova
- I-35131 Padova
- Italy
| | - Stefano Agnoli
- Department of Chemical Sciences and INSTM Research Unit
- University of Padova
- I-35131 Padova
- Italy
| | - Tiziana Cesca
- Physics and Astronomy Department
- University of Padova
- I-35131 Padova
- Italy
| | - Renato Bozio
- Department of Chemical Sciences and INSTM Research Unit
- University of Padova
- I-35131 Padova
- Italy
| | - Giovanni Mattei
- Physics and Astronomy Department
- University of Padova
- I-35131 Padova
- Italy
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49
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Smerieri M, Píš I, Ferrighi L, Nappini S, Lusuan A, Di Valentin C, Vaghi L, Papagni A, Cattelan M, Agnoli S, Magnano E, Bondino F, Savio L. Synthesis of graphene nanoribbons with a defined mixed edge-site sequence by surface assisted polymerization of (1,6)-dibromopyrene on Ag(110). Nanoscale 2016; 8:17843-17853. [PMID: 27714142 DOI: 10.1039/c6nr05952j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
By a combination of scanning tunneling microscopy, X-ray spectroscopic techniques and density functional theory calculations, we prove the formation of extended patterns of parallel, graphene nanoribbons with alternate zig-zag and armchair edges and selected width by surface-assisted Ullmann coupling polymerization and dehydrogenation of 1,6-dibromopyrene (C16H8Br2). Besides the relevance of these nanostructures for their possible application in nanodevices, we demonstrate the peculiarity of halogenated pyrene derivatives for the formation of nanoribbons, in particular on Ag(110). These results open the possibility of tuning the shape and dimension of nanoribbons (and hence the correlated electronic properties) by choosing suitably tailored or on-purpose designed molecular precursors.
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Affiliation(s)
- Marco Smerieri
- IMEM-CNR, UOS Genova, Via Dodecaneso 33, 16146 Genova, Italy.
| | - Igor Píš
- Elettra-Sincrotrone Trieste S.C.p.A., S.S. 14 km 163.5, 34149 Basovizza (TS), Italy. and IOM-CNR, Laboratorio TASC, S.S. 14 km 163.5, 34149 Basovizza (TS), Italy
| | - Lara Ferrighi
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, Via R. Cozzi 55, 20125 Milano, Italy
| | - Silvia Nappini
- IOM-CNR, Laboratorio TASC, S.S. 14 km 163.5, 34149 Basovizza (TS), Italy
| | - Angelique Lusuan
- IMEM-CNR, UOS Genova, Via Dodecaneso 33, 16146 Genova, Italy. and Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | - Cristiana Di Valentin
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, Via R. Cozzi 55, 20125 Milano, Italy
| | - Luca Vaghi
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, Via R. Cozzi 55, 20125 Milano, Italy
| | - Antonio Papagni
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, Via R. Cozzi 55, 20125 Milano, Italy
| | - Mattia Cattelan
- Department of Chemical Science, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
| | - Stefano Agnoli
- Department of Chemical Science, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
| | - Elena Magnano
- IOM-CNR, Laboratorio TASC, S.S. 14 km 163.5, 34149 Basovizza (TS), Italy and Department of Physics, University of Johannesburg, PO Box 524, Auckland Park, 2006, Johannesburg, South Africa
| | - Federica Bondino
- IOM-CNR, Laboratorio TASC, S.S. 14 km 163.5, 34149 Basovizza (TS), Italy
| | - Letizia Savio
- IMEM-CNR, UOS Genova, Via Dodecaneso 33, 16146 Genova, Italy.
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Calvillo L, Valero-Vidal C, Agnoli S, Sezen H, Rüdiger C, Kunze-Liebhäuser J, Granozzi G. Combined Photoemission Spectroscopy and Electrochemical Study of a Mixture of (Oxy)carbides as Potential Innovative Supports and Electrocatalysts. ACS Appl Mater Interfaces 2016; 8:19418-19427. [PMID: 27399154 DOI: 10.1021/acsami.6b04414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Active and stable non-noble metal materials, able to substitute Pt as catalyst or to reduce the Pt amount, are vitally important for the extended commercialization of energy conversion technologies, such as fuel cells and electrolyzers. Here, we report a fundamental study of nonstoichiometric tungsten carbide (WxC) and its interaction with titanium oxycarbide (TiOxCy) under electrochemical working conditions. In particular, the electrochemical activity and stability of the WxC/TiOxCy system toward the ethanol electrooxidation reaction (EOR) and hydrogen evolution reaction (HER) are investigated. The chemical changes caused by the applied potential are established by combining photoemission spectroscopy and electrochemistry. WxC is not active toward the ethanol electrooxidation reaction at room temperature but it is highly stable under these conditions thanks to the formation of a passive thin film on the surface, consisting mainly of WO2 and W2O5, which prevents the full oxidation of WxC. In addition, WxC is able to adsorb ethanol, forming ethoxy groups on the surface, which constitutes the first step for the ethanol oxidation. The interaction between WxC and TiOxCy plays an important role in the electrochemical stability of WxC since specific orientations of the substrate are able to stabilize WxC and prevent its corrosion. The beneficial interaction with the substrate and the specific surface chemistry makes tungsten carbide a good electrocatalyst support or cocatalyst for direct ethanol fuel cells. However, WxC is active toward the HER and chemically stable under hydrogen reduction conditions, since no changes in the chemical composition or dissolution of the film are observed. This makes tungsten carbide a good candidate as electrocatalyst support or cocatalyst for the electrochemical production of hydrogen.
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Affiliation(s)
- Laura Calvillo
- Department of Chemical Sciences and INSTM unit, Università di Padova , Via Marzolo 1, 35131 Padova, Italia
| | - Carlos Valero-Vidal
- Institute of Physical Chemistry, Leopold-Franzens-University Innsbruck , Innrain 52c, A-6020 Innsbruck, Austria
| | - Stefano Agnoli
- Department of Chemical Sciences and INSTM unit, Università di Padova , Via Marzolo 1, 35131 Padova, Italia
| | - Hikmet Sezen
- Elettra-Sincrotrone Trieste SCpA , SS14-Km163.5 in Area Science Park, 34149 Trieste, Italy
| | - Celine Rüdiger
- Institute of Physical Chemistry, Leopold-Franzens-University Innsbruck , Innrain 52c, A-6020 Innsbruck, Austria
| | - Julia Kunze-Liebhäuser
- Institute of Physical Chemistry, Leopold-Franzens-University Innsbruck , Innrain 52c, A-6020 Innsbruck, Austria
| | - Gaetano Granozzi
- Department of Chemical Sciences and INSTM unit, Università di Padova , Via Marzolo 1, 35131 Padova, Italia
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