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Liu K, Ye X, Zhang A, Wang X, Liang T, Fang Y, Zhang W, Hu K, Liu X, Chen X. Highly efficient Fe-Cu dual-site nanoparticles supported on black pearls 2000 (carbon black) as oxygen reduction reaction catalysts for Al-air batteries. RSC Adv 2024; 14:5184-5192. [PMID: 38332797 PMCID: PMC10851107 DOI: 10.1039/d3ra07925b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 01/23/2024] [Indexed: 02/10/2024] Open
Abstract
Acquiring cost-effective, high-performance, non-precious metal catalysts is crucial for substituting precious metal catalysts in the oxygen reduction reaction (ORR) to ensure sustainable energy conversion. Herein, we present a preparation strategy for a high-performance Cu-Fe-CN-3 electrocatalyst characterized via X-ray diffraction (XRD), Raman spectroscopy, Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) analyses. The results demonstrated that the incorporation of Cu and Fe into Black Pearls' carbon black (BP2000) and the strong synergistic effect between Fe and Cu contributed to the enhancement of active sites for the ORR. Electrochemical characterization revealed that the Cu-Fe-CN-3 catalyst synthesized by mixing Cu and Fe in a molar ratio of 3 : 1 exhibits superior catalytic activity for the ORR. The ORR performance of the Cu-Fe-CN-3 catalyst in an alkaline electrolyte (E1/2 0.867 V vs. RHE) surpassed that of Pt/C (E1/2 0.841 V vs. RHE), and the assembled aluminum-air battery demonstrated superior voltage stability compared to Pt/C under the same current density. After 2000 cycles, the E1/2 of the Cu-Fe-CN-3 catalyst exhibited a slight negative shift by 5 mV, which was better than the activity loss of the Pt/C catalyst (12 mV). At the same current density, the average discharge platform of Al-air batteries with the Cu-Fe-CN-3 catalyst was better than that of the commercial Pt/C catalyst. Therefore, the prepared Cu-Fe-CN-3 electrocatalyst exhibits great potential as an efficient ORR catalyst in fuel cells.
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Affiliation(s)
- Kun Liu
- Anhui Provincial Laboratory of Biomimetic Sensor and Detecting Technology, College of Materials and Chemical Engineering, West Anhui University Lu'an 237012 China +86 0564 3305690 +86 0564 3305690
| | - Xiaoyue Ye
- Anhui Provincial Laboratory of Biomimetic Sensor and Detecting Technology, College of Materials and Chemical Engineering, West Anhui University Lu'an 237012 China +86 0564 3305690 +86 0564 3305690
| | - Angli Zhang
- Anhui Provincial Laboratory of Biomimetic Sensor and Detecting Technology, College of Materials and Chemical Engineering, West Anhui University Lu'an 237012 China +86 0564 3305690 +86 0564 3305690
| | - Xiaoyan Wang
- Anhui Provincial Laboratory of Biomimetic Sensor and Detecting Technology, College of Materials and Chemical Engineering, West Anhui University Lu'an 237012 China +86 0564 3305690 +86 0564 3305690
| | - Ting Liang
- Anhui Provincial Laboratory of Biomimetic Sensor and Detecting Technology, College of Materials and Chemical Engineering, West Anhui University Lu'an 237012 China +86 0564 3305690 +86 0564 3305690
| | - Yan Fang
- Anhui Provincial Laboratory of Biomimetic Sensor and Detecting Technology, College of Materials and Chemical Engineering, West Anhui University Lu'an 237012 China +86 0564 3305690 +86 0564 3305690
| | - Wang Zhang
- Anhui Provincial Laboratory of Biomimetic Sensor and Detecting Technology, College of Materials and Chemical Engineering, West Anhui University Lu'an 237012 China +86 0564 3305690 +86 0564 3305690
| | - Ke Hu
- Anhui Provincial Laboratory of Biomimetic Sensor and Detecting Technology, College of Materials and Chemical Engineering, West Anhui University Lu'an 237012 China +86 0564 3305690 +86 0564 3305690
| | - Xiaowu Liu
- Anhui Provincial Laboratory of Biomimetic Sensor and Detecting Technology, College of Materials and Chemical Engineering, West Anhui University Lu'an 237012 China +86 0564 3305690 +86 0564 3305690
| | - Xin Chen
- Anhui Provincial Laboratory of Biomimetic Sensor and Detecting Technology, College of Materials and Chemical Engineering, West Anhui University Lu'an 237012 China +86 0564 3305690 +86 0564 3305690
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Monini V, Bonechi M, Bazzicalupi C, Bianchi A, Gentilesca P, Giurlani W, Innocenti M, Meoli A, Romano GM, Savastano M. Oxygen reduction reaction (ORR) in alkaline solution catalysed by an atomically precise catalyst based on a Pd(II) complex supported on multi-walled carbon nanotubes (MWCNTs). Electrochemical and structural considerations. Dalton Trans 2024; 53:2487-2500. [PMID: 38193252 DOI: 10.1039/d3dt03947a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
A new atomically precise, single-ion catalyst (MWCNT-LPd) for ORR (oxygen reduction reaction), consisting of a Pd(II) complex of a tetraazacycloalkane anchored on multiwalled carbon nanotubes, has been prepared through a supramolecular approach ensuring a uniform distribution of catalytic centres on the support surface. A tetraazacycloalkane was chosen to saturate the four coordination sites of the typical square planar coordination geometry of Pd(II) with the aim of ascertaining whether the metal ion must have free coordination sites to function effectively in the ORR or whether, as predicted by quantum mechanical calculations, the catalytic effect can be originated from an interaction of O2 in the fifth coordinative position. The results clearly demonstrated that tetracoordination of Pd(II) does not influence its catalytic capacity in the ORR. Electrodes based on this catalyst show ORR performance very close to that of commercial Pt electrodes, despite the low Pd(II) content (1.72% by weight) in the catalyst. The onset potential (Eon) value and the half-wave potential (E1/2) of the catalyst are, respectively, only 53 mV and 24 mV less positive than those observed for the Pt electrode and direct conversion of O2 to H2O reaches 85.0%, compared to 89% of the Pt electrode. Furthermore, a preliminary galvanostatic test (simulating a working fuel cell at a fixed potential) showed that the catalyst maintains its efficiency continuing to produce water throughout the process (the average number of electrons exchanged over time per O2 molecule remains close to 4).
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Affiliation(s)
- Valeria Monini
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy.
| | - Marco Bonechi
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy.
| | - Carla Bazzicalupi
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy.
| | - Antonio Bianchi
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy.
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Research Unit of Florence, Via G. Giusti 9, 50121 Florence, Italy.
| | - Pietro Gentilesca
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy.
| | - Walter Giurlani
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy.
| | - Massimo Innocenti
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy.
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Research Unit of Florence, Via G. Giusti 9, 50121 Florence, Italy.
| | - Arianna Meoli
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy.
| | - Giammarco Maria Romano
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy.
| | - Matteo Savastano
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Research Unit of Florence, Via G. Giusti 9, 50121 Florence, Italy.
- Department of Human Sciences for the Promotion of Quality of Life, University San Raffaele Roma, Via di Val Cannuta 247, 00166 Rome, Italy
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Kawondera R, Bonechi M, Maccioni I, Giurlani W, Salzillo T, Venuti E, Mishra D, Fontanesi C, Innocenti M, Mehlana G, Mtangi W. Chiral "doped" MOFs: an electrochemical and theoretical integrated study. Front Chem 2023; 11:1215619. [PMID: 37614707 PMCID: PMC10442718 DOI: 10.3389/fchem.2023.1215619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 07/27/2023] [Indexed: 08/25/2023] Open
Abstract
This work reports on the electrochemical behaviour of Fe and Zn based metal-organic framework (MOF) compounds, which are "doped" with chiral molecules, namely: cysteine and camphor sulfonic acid. Their electrochemical behaviour was thoroughly investigated via "solid-state" electrochemical measurements, exploiting an "ad hoc" tailored experimental set-up: a paste obtained by carefully mixing the MOF with graphite powder is deposited on a glassy carbon (GC) surface. The latter serves as the working electrode (WE) in cyclic voltammetry (CV) measurements. Infrared (IR), X-ray diffraction (XRD) and absorbance (UV-Vis) techniques are exploited for a further characterization of the MOFs' structural and electronic properties. The experimental results are then compared with DFT based quantum mechanical calculations. The electronic and structural properties of the MOFs synthesized in this study depend mainly on the type of metal center, and to a minor extent on the chemical nature of the dopant.
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Affiliation(s)
- Rufaro Kawondera
- Institute of Materials Science, Processing and Engineering Technology, Chinhoyi University of Technology, Chinhoyi, Zimbabwe
| | - Marco Bonechi
- Department of Chemistry, University of Firenze, Firenze, Italy
| | - Irene Maccioni
- Department of Chemistry, University of Firenze, Firenze, Italy
| | - Walter Giurlani
- Department of Chemistry, University of Firenze, Firenze, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Firenze, Italy
| | - Tommaso Salzillo
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Bologna, Italy
| | - Elisabetta Venuti
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Bologna, Italy
| | - Debabrata Mishra
- Department of Physics and Astrophysics, University of Delhi, New Delhi, India
| | - Claudio Fontanesi
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Firenze, Italy
- Department of Engineering “Enzo Ferrari” (DIEF), University of Modena, Modena, Italy
| | - Massimo Innocenti
- Department of Chemistry, University of Firenze, Firenze, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Firenze, Italy
- Center for Colloid and Surface Science (CSGI), Florence, Italy
| | - Gift Mehlana
- Department of Chemical Sciences, Midlands State University, Gweru, Zimbabwe
| | - Wilbert Mtangi
- Institute of Materials Science, Processing and Engineering Technology, Chinhoyi University of Technology, Chinhoyi, Zimbabwe
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Valbuena-Rus AM, Savastano M, Arranz-Mascarós P, Bazzicalupi C, Clares MP, Godino-Salido ML, Gutiérrez-Valero MD, Inclán M, Bianchi A, García-España E, López-Garzón R. Noncovalent Assembly and Catalytic Activity of Hybrid Materials Based on Pd Complexes Adsorbed on Multiwalled Carbon Nanotubes, Graphene, and Graphene Nanoplatelets. Inorg Chem 2022; 61:12610-12624. [PMID: 35926979 PMCID: PMC9387097 DOI: 10.1021/acs.inorgchem.2c01559] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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Green catalysts with excellent performance in Cu-free
Sonogashira
coupling reactions can be prepared by the supramolecular decoration
of graphene surfaces with Pd(II) complexes. Here we report the synthesis,
characterization, and catalytic properties of new catalysts obtained
by the surface decoration of multiwalled carbon nanotubes (MWCNTs),
graphene (G), and graphene nanoplatelets (GNPTs) with Pd(II) complexes
of tetraaza-macrocyclic ligands bearing one or two anchor functionalities.
The decoration of these carbon surfaces takes place under environmentally
friendly conditions (water, room temperature, aerobic) in two steps:
(i) π–π stacking attachment of the ligand via electron-poor
anchor group 6-amino-3,4-dihydro-3-methyl-5-nitroso-4-oxo-pyrimidine
and (ii) Pd(II) coordination from PdCl42–. Ligands are more efficiently adsorbed on the flat surfaces of G
and GNPTs than on the curved surfaces of MWCNTs. All catalysts work
very efficiently under mild conditions (50 °C, aerobic, 7 h),
giving a similar high yield (90% or greater) in the coupling of iodobenzene
with phenylacetylene to form diphenylacetylene in one catalytic cycle,
but catalysts based on G and GNPTs (especially on GNPTs) provide greater
catalytic efficiency in reuse (four cycles). The study also revealed
that the active centers of the ligand-Pd type decorating the support
surfaces are much more efficient than the Pd(0) and PdCl42– centers sharing the same surfaces. All of the
results allow a better understanding of the structural factors to
be controlled in order to obtain an optimal efficiency from similar
catalysts based on graphene supports. Green catalysts
with high efficiency in the Cu-free Sonogashira
C−C coupling reactions can be prepared by the supramolecular
functionalization of carbon materials.
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Affiliation(s)
- Alba M Valbuena-Rus
- Department of Inorganic and Organic Chemistry, University of Jaén, 23071 Jaen, Spain
| | - Matteo Savastano
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy.,National Interuniversity Consortium of Materials Science and Technology (INSTM), Via G. Giusti 9, 50121 Florence, Italy
| | | | - Carla Bazzicalupi
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
| | - María P Clares
- ICMol, Department of Inorganic Chemistry, University of Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - María L Godino-Salido
- Department of Inorganic and Organic Chemistry, University of Jaén, 23071 Jaen, Spain
| | | | - Mario Inclán
- ICMol, Department of Inorganic Chemistry, University of Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Antonio Bianchi
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
| | - Enrique García-España
- ICMol, Department of Inorganic Chemistry, University of Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Rafael López-Garzón
- Department of Inorganic and Organic Chemistry, University of Jaén, 23071 Jaen, Spain
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Bonechi M, Giurlani W, Innocenti M, Pasini D, Mishra S, Giovanardi R, Fontanesi C. On the Dynamics of the Carbon-Bromine Bond Dissociation in the 1-Bromo-2-Methylnaphthalene Radical Anion. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27144539. [PMID: 35889412 PMCID: PMC9319363 DOI: 10.3390/molecules27144539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 07/08/2022] [Accepted: 07/12/2022] [Indexed: 11/16/2022]
Abstract
This paper studies the mechanism of electrochemically induced carbon-bromine dissociation in 1-Br-2-methylnaphalene in the reduction regime. In particular, the bond dissociation of the relevant radical anion is disassembled at a molecular level, exploiting quantum mechanical calculations including steady-state, equilibrium and dissociation dynamics via dynamic reaction coordinate (DRC) calculations. DRC is a molecular-dynamic-based calculation relying on an ab initio potential surface. This is to achieve a detailed picture of the dissociation process in an elementary molecular detail. From a thermodynamic point of view, all the reaction paths examined are energetically feasible. The obtained results suggest that the carbon halogen bond dissociates following the first electron uptake follow a stepwise mechanism. Indeed, the formation of the bromide anion and an organic radical occurs. The latter reacts to form a binaphthalene intrinsically chiral dimer. This paper is respectfully dedicated to Professors Anny Jutand and Christian Amatore for their outstanding contribution in the field of electrochemical catalysis and electrosynthesis.
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Affiliation(s)
- Marco Bonechi
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy; (M.B.); (W.G.)
| | - Walter Giurlani
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy; (M.B.); (W.G.)
| | - Massimo Innocenti
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy; (M.B.); (W.G.)
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Via G. Giusti 9, 50121 Firenze, Italy
- Center for Colloid and Surface Science (CSGI), Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
- Correspondence: (M.I.); (C.F.)
| | - Dario Pasini
- Department of Chemistry, University of Pavia, Via Taramelli 10, 27100 Pavia, Italy;
| | - Suryakant Mishra
- Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;
| | - Roberto Giovanardi
- Department of Engineering “Enzo Ferrari” (DIEF), University of Modena, Via Vivarelli 10, 41125 Modena, Italy;
| | - Claudio Fontanesi
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Via G. Giusti 9, 50121 Firenze, Italy
- Department of Engineering “Enzo Ferrari” (DIEF), University of Modena, Via Vivarelli 10, 41125 Modena, Italy;
- Correspondence: (M.I.); (C.F.)
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Bonechi M, Giurlani W, Stefani A, Marchetti A, Innocenti M, Fontanesi C. Resorcinol Electropolymerization process obtained via Electrochemical Oxidation. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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