1
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Architecture Evolution of Different Nanoparticles Types: Relationship between the Structure and Functional Properties of Catalysts for PEMFC. Catalysts 2022. [DOI: 10.3390/catal12060638] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
This review considers the features of the catalysts with different nanoparticle structures architecture transformation under the various pre-treatment types. Based on the results of the publications analysis, it can be concluded that the chemical or electrochemical activation of bimetallic catalysts has a significant effect on their composition, microstructure, and catalytic activity in the oxygen reduction reaction. The stage of electrochemical activation is recommended for use as a mandatory catalyst pre-treatment to obtain highly active de-alloyed materials. The literature is studied, which covers possible variants of the structural modification under the influence of thermal treatment under different processing conditions. Additionally, based on the literature data analysis, recommendations are given for the thermal treatment of catalysts alloyed with various d-metals.
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2
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Formation Mechanism of Carbon-Supported Hollow PtNi Nanoparticles via One-Step Preparations for Use in the Oxygen Reduction Reaction. Catalysts 2022. [DOI: 10.3390/catal12050513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Hollow Pt-based nanoparticles are known to possess the properties of high electrocatalytic activity and durability. Nonetheless, their practical applications as catalytic materials are limited because of the requirement for exhaustive preparation. In this study, we prepared carbon-supported hollow PtNix (x = the moles of the Ni precursor to the Pt precursor in the catalyst preparation step) catalysts using a one-step preparation method, which substantially reduced the complexity of the conventional method for preparing hollow Pt-based catalysts. In particular, this hollow structure formation mechanism was proposed based on extensive characterizations. The prepared catalysts were examined to determine if they could be used as electrocatalysts for the oxygen reduction reaction (ORR). Among the investigated catalysts, the acid-treated hollow PtNi3/C catalyst demonstrated the best ORR activity, which was 3 times higher and 2.3 times higher than those of the commercial Pt/C and acid-treated particulate PtNi3/C catalysts, respectively.
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3
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Bai J, Ke S, Song J, Wang K, Sun C, Zhang J, Dou M. Surface Engineering of Carbon-Supported Platinum as a Route to Electrocatalysts with Superior Durability and Activity for PEMFC Cathodes. ACS APPLIED MATERIALS & INTERFACES 2022; 14:5287-5297. [PMID: 35072443 DOI: 10.1021/acsami.1c20823] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Hydrogen fuel cells are regarded as a promising new carbon mitigation strategy to realize carbon neutrality. The exploitation of robust and efficient cathode catalysts is thus vital to the commercialization of proton exchange membrane fuel cells (PEMFCs). Herein, we demonstrate a facile and scalable surface engineering route to achieve superior durability and high activity of a Pt-based material as a PEMFC cathode catalyst through a controllable liquid-phase reduction approach. The proposed surface engineering strategy by modifying Pt/C reduces the oxygen content on the carbon support and also decreases the surface defects on Pt nanoparticles (NPs), which effectively alleviate the corrosion of carbon and inhibit the detachment, agglomeration, and growth of Pt NPs. The resulting catalyst exhibits superior durability after a 10,000 potential cycling test in an acid electrolyte─outperforming commercial Pt/C. Moreover, the catalyst also demonstrates an improved oxygen reduction reaction (ORR) activity in comparison to commercial Pt/C by virtue of the high content of metallic Pt and the weakened Pt-OH bonding that releases more Pt active sites for ORR catalysis. Most importantly, the developed catalyst shows outstanding PEMFC performance and excellent long-term durability over 50 h of a constant-current test and 100 h of a load-cycling operation. This effective route provides a new avenue for exploiting robust Pt-based catalysts with superior activity in practical applications of PEMFCs.
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Affiliation(s)
- Jialin Bai
- Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Shaojie Ke
- Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jie Song
- State Key Laboratory of Advanced Transmission Technology, Global Energy Interconnection Research Institute Limited Company, Beijing 102209, China
| | - Kun Wang
- Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chaoyong Sun
- Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jiakun Zhang
- Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Meiling Dou
- Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
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4
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Ehelebe K, Knöppel J, Bierling M, Mayerhöfer B, Böhm T, Kulyk N, Thiele S, Mayrhofer KJJ, Cherevko S. Platinum Dissolution in Realistic Fuel Cell Catalyst Layers. Angew Chem Int Ed Engl 2021; 60:8882-8888. [PMID: 33410273 PMCID: PMC8048487 DOI: 10.1002/anie.202014711] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 12/15/2020] [Indexed: 11/12/2022]
Abstract
Pt dissolution has already been intensively studied in aqueous model systems and many mechanistic insights have been gained. Nevertheless, transfer of new knowledge to real‐world fuel cell systems is still a significant challenge. To close this gap, we present a novel in situ method combining a gas diffusion electrode (GDE) half‐cell with inductively coupled plasma mass spectrometry (ICP‐MS). With this setup, Pt dissolution in realistic catalyst layers and the transport of dissolved Pt species through Nafion membranes were evaluated directly. We observed that 1) specific Pt dissolution increased significantly with decreasing Pt loading, 2) in comparison to experiments on aqueous model systems with flow cells, the measured dissolution in GDE experiments was considerably lower, and 3) by adding a membrane onto the catalyst layer, Pt dissolution was reduced even further. All these phenomena are attributed to the varying mass transport conditions of dissolved Pt species, influencing re‐deposition and equilibrium potential.
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Affiliation(s)
- Konrad Ehelebe
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11), Forschungszentrum Jülich GmbH, 91058, Erlangen, Germany.,Department of Chemical and Biological Engineering, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Julius Knöppel
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11), Forschungszentrum Jülich GmbH, 91058, Erlangen, Germany.,Department of Chemical and Biological Engineering, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Markus Bierling
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11), Forschungszentrum Jülich GmbH, 91058, Erlangen, Germany.,Department of Chemical and Biological Engineering, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Britta Mayerhöfer
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11), Forschungszentrum Jülich GmbH, 91058, Erlangen, Germany.,Department of Chemical and Biological Engineering, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Thomas Böhm
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11), Forschungszentrum Jülich GmbH, 91058, Erlangen, Germany.,Department of Chemical and Biological Engineering, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Nadiia Kulyk
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11), Forschungszentrum Jülich GmbH, 91058, Erlangen, Germany
| | - Simon Thiele
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11), Forschungszentrum Jülich GmbH, 91058, Erlangen, Germany.,Department of Chemical and Biological Engineering, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Karl J J Mayrhofer
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11), Forschungszentrum Jülich GmbH, 91058, Erlangen, Germany.,Department of Chemical and Biological Engineering, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Serhiy Cherevko
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11), Forschungszentrum Jülich GmbH, 91058, Erlangen, Germany
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5
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Ehelebe K, Knöppel J, Bierling M, Mayerhöfer B, Böhm T, Kulyk N, Thiele S, Mayrhofer KJJ, Cherevko S. Platinum Dissolution in Realistic Fuel Cell Catalyst Layers. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014711] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Konrad Ehelebe
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11) Forschungszentrum Jülich GmbH 91058 Erlangen Germany
- Department of Chemical and Biological Engineering Friedrich-Alexander University Erlangen-Nürnberg Egerlandstr. 3 91058 Erlangen Germany
| | - Julius Knöppel
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11) Forschungszentrum Jülich GmbH 91058 Erlangen Germany
- Department of Chemical and Biological Engineering Friedrich-Alexander University Erlangen-Nürnberg Egerlandstr. 3 91058 Erlangen Germany
| | - Markus Bierling
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11) Forschungszentrum Jülich GmbH 91058 Erlangen Germany
- Department of Chemical and Biological Engineering Friedrich-Alexander University Erlangen-Nürnberg Egerlandstr. 3 91058 Erlangen Germany
| | - Britta Mayerhöfer
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11) Forschungszentrum Jülich GmbH 91058 Erlangen Germany
- Department of Chemical and Biological Engineering Friedrich-Alexander University Erlangen-Nürnberg Egerlandstr. 3 91058 Erlangen Germany
| | - Thomas Böhm
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11) Forschungszentrum Jülich GmbH 91058 Erlangen Germany
- Department of Chemical and Biological Engineering Friedrich-Alexander University Erlangen-Nürnberg Egerlandstr. 3 91058 Erlangen Germany
| | - Nadiia Kulyk
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11) Forschungszentrum Jülich GmbH 91058 Erlangen Germany
| | - Simon Thiele
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11) Forschungszentrum Jülich GmbH 91058 Erlangen Germany
- Department of Chemical and Biological Engineering Friedrich-Alexander University Erlangen-Nürnberg Egerlandstr. 3 91058 Erlangen Germany
| | - Karl J. J. Mayrhofer
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11) Forschungszentrum Jülich GmbH 91058 Erlangen Germany
- Department of Chemical and Biological Engineering Friedrich-Alexander University Erlangen-Nürnberg Egerlandstr. 3 91058 Erlangen Germany
| | - Serhiy Cherevko
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, (IEK-11) Forschungszentrum Jülich GmbH 91058 Erlangen Germany
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6
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Kwon T, Jun M, Lee K. Catalytic Nanoframes and Beyond. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001345. [PMID: 32633878 DOI: 10.1002/adma.202001345] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/01/2020] [Accepted: 04/09/2020] [Indexed: 06/11/2023]
Abstract
The ever-increasing need for the production and expenditure of sustainable energy is a result of the astonishing rate of consumption of fossil fuels and the accompanying environmental problems. Emphasis is being directed to the generation of sustainable energy by the fuel cell and water splitting technologies. Accordingly, the development of highly efficient electrocatalysts has attracted significant interest, as the fuel cell and water splitting technologies are critically dependent on their performance. Among numerous catalyst designs under investigation, nanoframe catalysts have an intrinsically large surface area per volume and a tunable composition, which impacts the number of catalytically active sites and their intrinsic catalytic activity, respectively. Nevertheless, the structural integrity of the nanoframe during electrochemical operation is an ongoing concern. Some significant advances in the field of nanoframe catalysts have been recently accomplished, specifically geared to resolving the catalytic stability concerns and significantly boosting the intrinsic catalytic activity of the active sites. Herein, general synthetic concepts of nanoframe structures and their structure-dependent catalytic performance are summarized, along with recent notable advances in this field. A discussion on the remaining challenges and future directions, addressing the limitations of nanoframe catalysts, are also provided.
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Affiliation(s)
- Taehyun Kwon
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Minki Jun
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Kwangyeol Lee
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
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7
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Lochner T, Kluge RM, Fichtner J, El‐Sayed HA, Garlyyev B, Bandarenka AS. Temperature Effects in Polymer Electrolyte Membrane Fuel Cells. ChemElectroChem 2020. [DOI: 10.1002/celc.202000588] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tim Lochner
- Department of Physics, Physics of Energy Conversion and StorageTechnical University of Munich James-Franck-Str. 1 85748 Garching bei München Germany
- BMW Group Taunusstr. 41 80809 München Germany
| | - Regina M. Kluge
- Department of Physics, Physics of Energy Conversion and StorageTechnical University of Munich James-Franck-Str. 1 85748 Garching bei München Germany
| | - Johannes Fichtner
- Department of Physics, Physics of Energy Conversion and StorageTechnical University of Munich James-Franck-Str. 1 85748 Garching bei München Germany
| | - Hany A. El‐Sayed
- Department of Chemistry, Chair of Technical ElectrochemistryTechnical University of Munich Lichtenbergstraße 4 85748 Garching bei München Germany
| | - Batyr Garlyyev
- Department of Physics, Physics of Energy Conversion and StorageTechnical University of Munich James-Franck-Str. 1 85748 Garching bei München Germany
| | - Aliaksandr S. Bandarenka
- Department of Physics, Physics of Energy Conversion and StorageTechnical University of Munich James-Franck-Str. 1 85748 Garching bei München Germany
- Catalysis Research CenterTechnical University of Munich Ernst-Otto-Fischer-Str. 1 85748 Garching bei München Germany
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8
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Park J, Kwon T, Kim J, Jin H, Kim HY, Kim B, Joo SH, Lee K. Hollow nanoparticles as emerging electrocatalysts for renewable energy conversion reactions. Chem Soc Rev 2018; 47:8173-8202. [PMID: 30009297 DOI: 10.1039/c8cs00336j] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
While the realization of clean and sustainable energy conversion systems primarily requires the development of highly efficient catalysts, one of the main issues had been designing the structure of the catalysts to fulfill minimum cost as well as maximum performance. Until now, noble metal-based nanocatalysts had shown outstanding performances toward the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER). However, the scarcity and high cost of them impeded their practical use. Recently, hollow nanostructures including nanocages and nanoframes had emerged as a burgeoning class of promising electrocatalysts. The hollow nanostructures could expose a high proportion of active surfaces while saving the amounts of expensive noble metals. In this review, we introduced recent advances in the synthetic methodologies for generating noble metal-based hollow nanostructures based on thermodynamic and kinetic approaches. We summarized electrocatalytic applications of hollow nanostructures toward the ORR, OER, and HER. We next provided strategies that could endow structural robustness to the flimsy structural nature of hollow structures. Finally, we concluded this review with perspectives to facilitate the development of hollow nanostructure-based catalysts for energy applications.
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Affiliation(s)
- Jongsik Park
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea.
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9
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Asset T, Chattot R, Fontana M, Mercier-Guyon B, Job N, Dubau L, Maillard F. A Review on Recent Developments and Prospects for the Oxygen Reduction Reaction on Hollow Pt-alloy Nanoparticles. Chemphyschem 2018; 19:1552-1567. [PMID: 29578267 DOI: 10.1002/cphc.201800153] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Indexed: 11/06/2022]
Abstract
Due to their interesting electrocatalytic properties for the oxygen reduction reaction (ORR), hollow Pt-alloy nanoparticles (NPs) supported on high-surface-area carbon attract growing interest. However, the suitable synthesis methods and associated mechanisms of formation, the reasons for their enhanced specific activity for the ORR, and the nature of adequate alloying elements and carbon supports for this type of nanocatalysts remain open questions. This Review aims at shedding light on these topics with a special emphasis on hollow PtNi NPs supported onto Vulcan C (PtNi/C). We first show how hollow Pt-alloy/C NPs can be synthesized by a mechanism involving galvanic replacement and the nanoscale Kirkendall effect. Nickel, cobalt, copper, zinc, and iron (Ni, Co, Cu, Zn, and Fe, respectively) were tested for the formation of Pt-alloy/C hollow nanostructures. Our results indicate that metals with standard potential -0.4<E<0.4 V (vs. the normal hydrogen electrode) and propensity to spontaneously form metal borides in the presence of sodium borohydride are adequate sacrificial templates. As they lead to smaller hollow Pt-alloy/C NPs, mesoporous carbon supports are also best suited for this type of synthesis. A comparison of the electrocatalytic activity towards the ORR or the electrooxidation of a COads monolayer, methanol or ethanol of hollow and solid Pt-alloy/C NPs underlines the pivotal role of the structural disorder of the metal lattice, and is supported by ab initio calculations. As evidenced by accelerated stress tests simulating proton-exchange membrane fuel cell cathode operating conditions, the beneficial effect of structural disorder is maintained on the long term, thereby bringing promises for the synthesis of highly active and robust ORR electrocatalysts.
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Affiliation(s)
- Tristan Asset
- Univ. Grenoble Alpes, CNRS, Grenoble-INP (Institute of Engineering Univ. Grenoble Alpes), Université Savoie-Mont-Blanc, LEPMI, 38000, Grenoble, France.,University of Liège, Department of Chemical Engineering - Nanomaterials, Catalysis, Electrochemistry, B6a, Sart-Tilman, B-4000, Liège, Belgium
| | - Raphaël Chattot
- Univ. Grenoble Alpes, CNRS, Grenoble-INP (Institute of Engineering Univ. Grenoble Alpes), Université Savoie-Mont-Blanc, LEPMI, 38000, Grenoble, France
| | - Marie Fontana
- Univ. Grenoble Alpes, CNRS, Grenoble-INP (Institute of Engineering Univ. Grenoble Alpes), Université Savoie-Mont-Blanc, LEPMI, 38000, Grenoble, France
| | - Benjamin Mercier-Guyon
- Univ. Grenoble Alpes, CNRS, Grenoble-INP (Institute of Engineering Univ. Grenoble Alpes), Université Savoie-Mont-Blanc, LEPMI, 38000, Grenoble, France
| | - Nathalie Job
- University of Liège, Department of Chemical Engineering - Nanomaterials, Catalysis, Electrochemistry, B6a, Sart-Tilman, B-4000, Liège, Belgium
| | - Laetitia Dubau
- Univ. Grenoble Alpes, CNRS, Grenoble-INP (Institute of Engineering Univ. Grenoble Alpes), Université Savoie-Mont-Blanc, LEPMI, 38000, Grenoble, France
| | - Frédéric Maillard
- Univ. Grenoble Alpes, CNRS, Grenoble-INP (Institute of Engineering Univ. Grenoble Alpes), Université Savoie-Mont-Blanc, LEPMI, 38000, Grenoble, France
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10
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Ortatatlı Ş, Knossalla J, Schüth F, Weidenthaler C. Monitoring the formation of PtNi nanoalloys supported on hollow graphitic spheres using in situ pair distribution function analysis. Phys Chem Chem Phys 2018; 20:8466-8474. [PMID: 29349476 DOI: 10.1039/c7cp07840d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article aims to address the formation and the structural disordering/ordering phenomena of PtNi nanoalloys supported on hollow graphitic spheres (HGSs) using pair distribution function (PDF) analysis under ex situ/in situ data collection conditions. Starting from small nanoparticles (10-15 Å in diameter) embedded in HGSs, structural changes were monitored during stepwise heating and cooling of the sample using in situ PDF analysis. In order to evaluate the conventional synthesis route for the production of PtNi nanoalloys supported on HGSs, ex situ PDF experiments were performed before and after heat treatment in a furnace. The studies demonstrate that the local structure of the in situ synthesised PtNi nanoalloy differs from its ex situ synthesised counterpart. A partially ordered PtNi nanoalloy was obtained during the stepwise in situ cooling of the precursor, whereas the conventional ex situ synthesis route did not lead to the formation of an ordered crystal structure. In this study we could show that rapid heating and cooling results in a disordered PtNi alloy whereas slow heating and cooling leads to disorder-order transitions in PtNi.
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Affiliation(s)
- Ş Ortatatlı
- Max-Planck-Institut für Kohlenforschung, Mülheim an der Ruhr, Germany.
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11
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Brummel O, Waidhas F, Khalakhan I, Vorokhta M, Dubau M, Kovács G, Aleksandrov HA, Neyman KM, Matolín V, Libuda J. Structural transformations and adsorption properties of PtNi nanoalloy thin film electrocatalysts prepared by magnetron co-sputtering. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.08.062] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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12
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Electrocatalytic behaviour towards oxygen reduction reaction of carbon-supported Pt x M y Au z (M = Ni, Cu, Co) binary and ternary catalysts. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.05.036] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Le Bacq O, Pasturel A, Chattot R, Previdello B, Nelayah J, Asset T, Dubau L, Maillard F. Effect of Atomic Vacancies on the Structure and the Electrocatalytic Activity of Pt-rich/C Nanoparticles: A Combined Experimental and Density Functional Theory Study. ChemCatChem 2017. [DOI: 10.1002/cctc.201601672] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Olivier Le Bacq
- Univ. Grenoble Alpes, SIMAP; F-38000 Grenoble France
- CNRS, SIMAP; F-38000 Grenoble France
| | - Alain Pasturel
- Univ. Grenoble Alpes, SIMAP; F-38000 Grenoble France
- CNRS, SIMAP; F-38000 Grenoble France
| | - Raphaël Chattot
- Univ. Grenoble Alpes, LEPMI; F-38000 Grenoble France
- CNRS, LEPMI; F-38000 Grenoble France
| | - Bruno Previdello
- Institute of Chemistry of São Carlos; University of São Paulo, CP 780; CEP 13560-970 São Carlos, SP Brazil
| | - Jaysen Nelayah
- Université Paris Diderot, Sorbonne Paris Cité, CNRS, Laboratoire Matériaux et Phénomènes Quantiques, UMR 7162; 75013 Paris France
| | - Tristan Asset
- Univ. Grenoble Alpes, LEPMI; F-38000 Grenoble France
- CNRS, LEPMI; F-38000 Grenoble France
| | - Laetitia Dubau
- Univ. Grenoble Alpes, LEPMI; F-38000 Grenoble France
- CNRS, LEPMI; F-38000 Grenoble France
| | - Frédéric Maillard
- Univ. Grenoble Alpes, LEPMI; F-38000 Grenoble France
- CNRS, LEPMI; F-38000 Grenoble France
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14
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Chattot R, Asset T, Drnec J, Bordet P, Nelayah J, Dubau L, Maillard F. Atomic-Scale Snapshots of the Formation and Growth of Hollow PtNi/C Nanocatalysts. NANO LETTERS 2017; 17:2447-2453. [PMID: 28340297 DOI: 10.1021/acs.nanolett.7b00119] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Determining the formation and growth mechanism of bimetallic nanoparticles (NPs) with atomic detail is fundamental to synthesize efficient "catalysts by design". However, an understanding of the elementary steps which take place during their synthesis remains elusive. Herein, we have exploited scanning transmission electron microscopy coupled to energy-dispersive X-ray spectroscopy, operando wide angle and small-angle X-ray scattering, and electrochemistry to unveil the formation and growth mechanism of hollow PtNi/C NPs. Such NPs, composed of a PtNi shell surrounding a nanoscale void, catalyze efficiently and sustainably the oxygen reduction reaction (ORR) in an acidic electrolyte. Our step-by-step study reveals that (i) Ni-rich/C NPs form first, before being embedded in a NixByOz shell, (ii) the combined action of galvanic displacement and the nanoscale Kirkendall effect then results in the sequential formation of Ni-rich core@Pt-rich/C shell and ultimately hollow PtNi/C NPs. The electrocatalytic properties for the ORR and the stability of the different synthesis intermediates were tested and structure-activity-stability relationships established both in acidic and alkaline electrolytes. Beyond its interest for the ORR electrocatalysis, this study also presents a methodology that is capable to unravel the formation and growth mechanism of various nanomaterials including preferentially shaped metal NPs, core@shell NPs, onion-like NPs, Janus NPs, or a combination of several of these structures.
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Affiliation(s)
- Raphaël Chattot
- Univ. Grenoble Alpes, LEPMI , F-38000 Grenoble, France
- CNRS, LEPMI , F-38000 Grenoble, France
| | - Tristan Asset
- Univ. Grenoble Alpes, LEPMI , F-38000 Grenoble, France
- CNRS, LEPMI , F-38000 Grenoble, France
| | - Jakub Drnec
- European Synchrotron Radiation Facility , ID 31 Beamline, BP 220, F-38043 Grenoble Cedex, France
| | - Pierre Bordet
- Université Grenoble Alpes, Institut Néel , F-38000 Grenoble, France
- CNRS, Institut Néel , F-38000 Grenoble, France
| | - Jaysen Nelayah
- Université Paris Diderot, Sorbonne Paris Cité, CNRS, Laboratoire Matériaux et Phénomènes Quantiques, UMR 7162, F-75013, Paris, France
| | - Laetitia Dubau
- Univ. Grenoble Alpes, LEPMI , F-38000 Grenoble, France
- CNRS, LEPMI , F-38000 Grenoble, France
| | - Frédéric Maillard
- Univ. Grenoble Alpes, LEPMI , F-38000 Grenoble, France
- CNRS, LEPMI , F-38000 Grenoble, France
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15
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Dubau L, Nelayah J, Asset T, Chattot R, Maillard F. Implementing Structural Disorder as a Promising Direction for Improving the Stability of PtNi/C Nanoparticles. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00410] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Laetitia Dubau
- Université Grenoble Alpes, LEPMI, F-38000 Grenoble, France
- CNRS, LEPMI, F-38000 Grenoble, France
| | - Jaysen Nelayah
- Université Paris Diderot, Sorbonne Paris Cité,
CNRS, Laboratoire Matériaux et Phénomènes Quantiques,
UMR 7162, F-75013 Paris, France
| | - Tristan Asset
- Université Grenoble Alpes, LEPMI, F-38000 Grenoble, France
- CNRS, LEPMI, F-38000 Grenoble, France
| | - Raphaël Chattot
- Université Grenoble Alpes, LEPMI, F-38000 Grenoble, France
- CNRS, LEPMI, F-38000 Grenoble, France
| | - Frédéric Maillard
- Université Grenoble Alpes, LEPMI, F-38000 Grenoble, France
- CNRS, LEPMI, F-38000 Grenoble, France
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16
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Asset T, Chattot R, Nelayah J, Job N, Dubau L, Maillard F. Structure-Activity Relationships for the Oxygen Reduction Reaction in Porous Hollow PtNi/C Nanoparticles. ChemElectroChem 2016. [DOI: 10.1002/celc.201600300] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tristan Asset
- University of Grenoble Alpes, LEPMI; 38000 Grenoble France
- CNRS, LEPMI; 38000 Grenoble France
- University of Liège; Department of Chemical Engineering: Nanomaterials, Catalysis, Electrochemistry, B6a, Sart-Tilman; 4000 Liège Belgium
| | - Raphaël Chattot
- University of Grenoble Alpes, LEPMI; 38000 Grenoble France
- CNRS, LEPMI; 38000 Grenoble France
| | - Jaysen Nelayah
- Laboratoire Matériaux et Phénomènes Quantiques (MPQ), UMR 7162 CNRS &; Université Paris-Diderot, Bâtiment Condorcet; 4 rue Elsa Morante 75205 Paris Cedex 13 France
| | - Nathalie Job
- University of Liège; Department of Chemical Engineering: Nanomaterials, Catalysis, Electrochemistry, B6a, Sart-Tilman; 4000 Liège Belgium
| | - Laetitia Dubau
- University of Grenoble Alpes, LEPMI; 38000 Grenoble France
- CNRS, LEPMI; 38000 Grenoble France
| | - Frédéric Maillard
- University of Grenoble Alpes, LEPMI; 38000 Grenoble France
- CNRS, LEPMI; 38000 Grenoble France
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17
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Dubau L, Nelayah J, Moldovan S, Ersen O, Bordet P, Drnec J, Asset T, Chattot R, Maillard F. Defects do Catalysis: CO Monolayer Oxidation and Oxygen Reduction Reaction on Hollow PtNi/C Nanoparticles. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01106] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Laetitia Dubau
- Université Grenoble Alpes, LEPMI, F-38000 Grenoble, France
- CNRS, LEPMI, F-38000 Grenoble, France
| | - Jaysen Nelayah
- Laboratoire Matériaux et Phénomènes Quantiques (MPQ), UMR 7162, CNRS & Université Paris-Diderot, Bâtiment Condorcet, 4 rue Elsa Morante, F-75205 Paris Cedex 13, France
| | - Simona Moldovan
- Institut
de Physique et Chimie des Matériaux de Strasbourg (IPCMS),
UMR 7504, CNRS-Université de Strasbourg (UdS), 23 rue du Lœss, Cedex 2 Strasbourg, France
| | - Ovidiu Ersen
- Institut
de Physique et Chimie des Matériaux de Strasbourg (IPCMS),
UMR 7504, CNRS-Université de Strasbourg (UdS), 23 rue du Lœss, Cedex 2 Strasbourg, France
| | - Pierre Bordet
- Université Grenoble Alpes, Institut Néel, F-38000 Grenoble, France
- CNRS, Institut Néel, F-38000 Grenoble, France
| | - Jakub Drnec
- European Synchrotron Radiation Facility, ID 31 Beamline, BP 220, F-38043 Grenoble Cedex, France
| | - Tristan Asset
- Université Grenoble Alpes, LEPMI, F-38000 Grenoble, France
- CNRS, LEPMI, F-38000 Grenoble, France
| | - Raphaël Chattot
- Université Grenoble Alpes, LEPMI, F-38000 Grenoble, France
- CNRS, LEPMI, F-38000 Grenoble, France
| | - Frédéric Maillard
- Université Grenoble Alpes, LEPMI, F-38000 Grenoble, France
- CNRS, LEPMI, F-38000 Grenoble, France
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18
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Zhang H, Zhang Y, Zhou Y, Zhang C, Sheng X, Zhao S, Fang J, Zhang M. Self-assembly of hollow spherical nanocatalysts with encapsulated Pt NPs and the effect of Ce-dipping on catalytic activity. RSC Adv 2016. [DOI: 10.1039/c6ra13245f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This article reports a facile and controllable one-step method to construct Pt@hollow mesoporous SiO2 (Pt@HMSiO2) nanoparticles (NPs).
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Affiliation(s)
- Hongxing Zhang
- School of Chemistry and Chemical Engineering
- Southeast University
- Jiangsu Optoelectronic Functional Materials and Engineering Laboratory
- Nanjing 211189
- China
| | - Yiwei Zhang
- School of Chemistry and Chemical Engineering
- Southeast University
- Jiangsu Optoelectronic Functional Materials and Engineering Laboratory
- Nanjing 211189
- China
| | - Yuming Zhou
- School of Chemistry and Chemical Engineering
- Southeast University
- Jiangsu Optoelectronic Functional Materials and Engineering Laboratory
- Nanjing 211189
- China
| | - Chao Zhang
- School of Chemistry and Chemical Engineering
- Southeast University
- Jiangsu Optoelectronic Functional Materials and Engineering Laboratory
- Nanjing 211189
- China
| | - Xiaoli Sheng
- School of Chemistry and Chemical Engineering
- Southeast University
- Jiangsu Optoelectronic Functional Materials and Engineering Laboratory
- Nanjing 211189
- China
| | - Shuo Zhao
- School of Chemistry and Chemical Engineering
- Southeast University
- Jiangsu Optoelectronic Functional Materials and Engineering Laboratory
- Nanjing 211189
- China
| | - Jiasheng Fang
- School of Chemistry and Chemical Engineering
- Southeast University
- Jiangsu Optoelectronic Functional Materials and Engineering Laboratory
- Nanjing 211189
- China
| | - Mingyu Zhang
- School of Chemistry and Chemical Engineering
- Southeast University
- Jiangsu Optoelectronic Functional Materials and Engineering Laboratory
- Nanjing 211189
- China
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