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Singh SK, Takeyasu K, Homma K, Ito S, Morinaga T, Endo Y, Furukawa M, Mori T, Ogasawara H, Nakamura J. Activating Nitrogen-doped Graphene Oxygen Reduction Electrocatalysts in Acidic Electrolytes using Hydrophobic Cavities and Proton-conductive Particles. Angew Chem Int Ed Engl 2022; 61:e202212506. [PMID: 36240783 DOI: 10.1002/anie.202212506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Indexed: 11/06/2022]
Abstract
Although pyridinic-nitrogen (pyri-N) doped graphene is highly active for the oxygen reduction reaction (ORR) of fuel cells in alkaline media, the activity critically decreases under acidic conditions. We report on how to prevent the deactivation based on the mechanistic understanding that O 2 + p y r i - N H + + e - → O 2 , a + p y r i - N H ${{{\rm O}}_{2}+{\rm p}{\rm y}{\rm r}{\rm i}{\rm { -}}{\rm N}{{\rm H}}^{+}+{{\rm e}}^{-}{\to }_{\ }^{{\rm \ }}{{\rm O}}_{2,{\rm a}}+{\rm p}{\rm y}{\rm r}{\rm i}{\rm { -}}{\rm N}{\rm H}}$ governs the ORR kinetics. First, we considered that the deactivation is due to the hydration of pyri-NH+ , leading to a lower shift of the redox potential. Introducing the hydrophobic cavity prevented the hydration of pyri-NH+ but inhibited the proton transport. We then increased proton conductivity in the hydrophobic cavity by introducing SiO2 particles coated with ionic liquid polymer/Nafion® which kept the high onset potentials with an increased current density even in acidic media.
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Affiliation(s)
- Santosh K Singh
- Graduate School of Science and Technology, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan.,Department of Chemistry, School of Natural Sciences, Shiv Nadar University Delhi-NCR, Greater Noida, Uttar Pradesh, 201314, India
| | - Kotaro Takeyasu
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan.,Tsukuba Research Centre for Energy and Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan.,R&D Center for Zero CO2 Emission with Functional Materials, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
| | - Kaito Homma
- Graduate School of Science and Technology, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
| | - Shigeharu Ito
- Department of Creative Engineering, National Institute of Technology (KOSEN), Tsuruoka College, 104 Sawada, Inooka, Tsuruoka, Yamagata 997-8511, Japan
| | - Takashi Morinaga
- Department of Creative Engineering, National Institute of Technology (KOSEN), Tsuruoka College, 104 Sawada, Inooka, Tsuruoka, Yamagata 997-8511, Japan
| | - Yuto Endo
- Graduate School of Science and Technology, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
| | - Moeko Furukawa
- Graduate School of Science and Technology, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
| | - Toshiyuki Mori
- Center for Green Research on Energy and Environmental Materials, National Institute for Materials Sciences (NIMS) 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Hirohito Ogasawara
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA
| | - Junji Nakamura
- Faculty of Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan.,Tsukuba Research Centre for Energy and Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan.,Mitsui Chemicals, Inc.-Carbon Neutral Research Center (MCI-CNRC), International Institute for Carbon-Neutral Energy Research (I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka-shi, Fukuoka, 819-0395, Japan
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Bouyahya A, Sembo-Backonly BS, Favrelle-Huret A, Balieu S, Guillen F, Mesnage V, Karakasyan-Dia C, Lahcini M, Le Cerf D, Gouhier G. New ternary water-soluble support from self-assembly of β-cyclodextrin-ionic liquid and an anionic polymer for a dialysis device. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:271-283. [PMID: 34523096 DOI: 10.1007/s11356-021-16374-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 09/02/2021] [Indexed: 06/13/2023]
Abstract
We developed a new hybrid material resulting from an innovative supramolecular tripartite association between an ionic liquid covalently immobilized on primary β-cyclodextrins rim and an anionic water-soluble polymer. Two hydrophilic ternary complexes based on native and permethylated β-cyclodextrins substituted with an ionic liquid and immobilized on poly(styrene sulfonate) (CD-IL+PSS- and CD(OMe)IL+PSS-) were obtained by simple dialysis with a cyclodextrin maximal grafting rate of 25% and 20% on the polymer, respectively. These polyelectrolytes are based on electrostatic interactions between the opposite charges of the imidazolium cation of the ionic liquid and the poly(styrene sulfonate) anion. The inclusion properties of the free cavities of the cyclodextrins and the synergic effect of the polymeric matrix were studied with three reference guests such as phenolphthalein, p-nitrophenol, and 2-anilinonaphthalene-6-sulfonic acid using UV-visible, fluorescent, and NMR spectroscopies. The support has been applied successfully in dialysis device to extract and concentrated aromatic model molecule. This simple and flexible synthetic strategy opens the way to new hybrid materials useful for fast and low-cost ecofriendly extraction techniques relevant for green analytical chemistry.
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Affiliation(s)
- Asmaa Bouyahya
- Normandie Université, COBRA UMR 6014, FR 3038, INSA Rouen, CNRS, IRCOF, 1 rue Tesnière, 76821, Mont-Saint-Aignan, France
- IMED-Lab, Faculty of Sciences and Techniques, Cadi Ayyad University, Avenue Abdelkrim Elkhattabi, B.P 549, 40000, Marrakech, Morocco
| | - Berthe-Sandra Sembo-Backonly
- Normandie Université, COBRA UMR 6014, FR 3038, INSA Rouen, CNRS, IRCOF, 1 rue Tesnière, 76821, Mont-Saint-Aignan, France
| | - Audrey Favrelle-Huret
- Normandie Université, COBRA UMR 6014, FR 3038, INSA Rouen, CNRS, IRCOF, 1 rue Tesnière, 76821, Mont-Saint-Aignan, France
- Normandie Univ, PBS UMR 6270, UNIROUEN, INSA Rouen, CNRS, 76821, Mont-Saint-Aignan, France
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000, Lille, France
| | - Sébastien Balieu
- Normandie Université, COBRA UMR 6014, FR 3038, INSA Rouen, CNRS, IRCOF, 1 rue Tesnière, 76821, Mont-Saint-Aignan, France
| | - Frédéric Guillen
- Normandie Université, COBRA UMR 6014, FR 3038, INSA Rouen, CNRS, IRCOF, 1 rue Tesnière, 76821, Mont-Saint-Aignan, France
- Université Toulouse III - Paul Sabatier, SPCMIB UMR CNRS 5068, 118 route de Narbonne, 31062 Cedex 9, Toulouse, France
| | - Valérie Mesnage
- Normandie Univ, UNIROUEN, UNICAEN, CNRS, M2C, 76000, Rouen, France
| | - Carole Karakasyan-Dia
- Normandie Univ, PBS UMR 6270, UNIROUEN, INSA Rouen, CNRS, 76821, Mont-Saint-Aignan, France
| | - Mohammed Lahcini
- IMED-Lab, Faculty of Sciences and Techniques, Cadi Ayyad University, Avenue Abdelkrim Elkhattabi, B.P 549, 40000, Marrakech, Morocco
- Mohammed VI Polytechnic University, Lot 660, Hay Moulay Rachid, 43150, Ben Guerir, Morocco
| | - Didier Le Cerf
- Normandie Univ, PBS UMR 6270, UNIROUEN, INSA Rouen, CNRS, 76821, Mont-Saint-Aignan, France
| | - Géraldine Gouhier
- Normandie Université, COBRA UMR 6014, FR 3038, INSA Rouen, CNRS, IRCOF, 1 rue Tesnière, 76821, Mont-Saint-Aignan, France.
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Lettow JH, Kaplan RY, Nealey PF, Rowan SJ. Enhanced Ion Conductivity through Hydrated, Polyelectrolyte-Grafted Cellulose Nanocrystal Films. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01155] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- James H. Lettow
- Pritzker School of Molecular Engineering, University of Chicago, 5640 S. Ellis Avenue, Chicago, Illinois 60637, United States
| | - Richard Y. Kaplan
- Pritzker School of Molecular Engineering, University of Chicago, 5640 S. Ellis Avenue, Chicago, Illinois 60637, United States
| | - Paul F. Nealey
- Pritzker School of Molecular Engineering, University of Chicago, 5640 S. Ellis Avenue, Chicago, Illinois 60637, United States
| | - Stuart J. Rowan
- Pritzker School of Molecular Engineering, University of Chicago, 5640 S. Ellis Avenue, Chicago, Illinois 60637, United States
- Department of Chemistry, University of Chicago, 5735 S Ellis Avenue, Chicago, Illinois 60637, United States
- Chemical and Engineering Sciences Division, Argonne National Laboratory, 9700 Cass Avenue, Lemont, Illinois 60439, United States
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Zhang C, Yang S, Padmanabhan V, Akcora P. Solution Rheology of Poly(acrylic acid)-Grafted Silica Nanoparticles. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01309] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chongfeng Zhang
- Department of Chemical Engineering & Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Siyang Yang
- Department of Chemical Engineering & Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Venkat Padmanabhan
- Department of Chemical Engineering, Tennessee Technological University, Cookeville, Tennessee 38505, United States
| | - Pinar Akcora
- Department of Chemical Engineering & Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
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Geng J, Zhou Q, Ge J, Bai B, Ni L. Synthesis and characterization of highly oxidative resistant silicon–acetylene hybrid resin grafted with modified mesoporous silica. HIGH PERFORM POLYM 2018. [DOI: 10.1177/0954008317692851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study focused on the preparation and characterization of silicon–acetylene resin by means of grafting functionalized mesoporous silica. (3-Aminopropyl) triethoxysilane was grafted to silica surface through the hydrolysis reaction to yield mesoporous silica functionalized with (3-Aminopropyl) triethoxysilane (MA). These MA nanoparticles were transferred to the chain of silicon–acetylene resin, poly(m-dietheynylbenzene-methylsilane) (PSA) to yield PSA-g-MA, with the help of the reaction of hydrochloric acid removal. PSA-g-MA was totally characterized by Fourier transform infrared spectroscopy, energy dispersive spectroscopy, differential scanning calorimetry, thermogravimetric analysis, scanning electron microscope, transmission electron microscope, and nuclear magnetic resonance, which certified the success of silica modification and functionalized nanoparticles grafted to chain of PSA. The char content of PSA-g-MA reached to 45% at 1000°C under air atmosphere, and the residual weight was increased by nearly 10%, compared with the unmodified PSA.
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Affiliation(s)
- Jie Geng
- School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, People’s Republic of China
| | - Quan Zhou
- School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, People’s Republic of China
| | - Juan Ge
- School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, People’s Republic of China
| | - Bo Bai
- School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, People’s Republic of China
| | - Lizhong Ni
- School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, People’s Republic of China
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Chao CG, Kumar MP, Riaz N, Khanoyan RT, Madrahimov ST, Bergbreiter DE. Polyisobutylene Oligomers as Tools for Iron Oxide Nanoparticle Solubilization. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02407] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Chih-Gang Chao
- Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States
| | - Manyam Praveen Kumar
- Department of Chemistry, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar
| | - Nadia Riaz
- Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States
| | - Raquel T. Khanoyan
- Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States
| | | | - David E. Bergbreiter
- Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States
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Xu Q, Chen L. Integral equation prediction of structure of nanocomposites with polymer-grafted nanoparticles near solid surface. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.10.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Mangal R, Nath P, Tikekar M, Archer LA. Enthalpy-Driven Stabilization of Dispersions of Polymer-Grafted Nanoparticles in High-Molecular-Weight Polymer Melts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:10621-10631. [PMID: 27650041 DOI: 10.1021/acs.langmuir.6b02613] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Phase stability of polymer nanocomposites (PNCs) composed of polymer-grafted SiO2 nanoparticles (NPs) blended with high-molar-mass host polymer chains is investigated. We focus on blends in which the particle-grafted polymer, polyethylene glycol (PEG), and the host-atactic poly(methylmethacrylate) (PMMA) or PMMA/oligo-PEG blends-exhibit favorable enthalpic interactions. Small-angle X-ray scattering measurements are used to evaluate the phase stability of the blends and to report on the structure of the materials at intermediate and long length scales. By exploring SiO2-PEG/PMMA and SiO2-PEG/PMMA-PEG systems covering a wide range of molecular weights (Mw) of PMMA (1.1 kDa ≤ Mw,PMMA ≤ 1.1 × 103 kDa) and tethered PEG (0.5 kDa ≤ Mw, PEG ≤ 2 kDa), we are able to develop a comprehensive stability map for PNCs based on hairy NPs. At low Mw,PEG, the phase behavior is dominated by entropic effects and the negative Flory-Huggins χ parameter between PEG and PMMA plays no role in phase stability. For higher Mw,PEO and intermediate Mw,PMMA, a crossover from entropy- to enthalpy-dominated behavior is observed, which leads to the phase stability in PNCs well beyond the conventional limits reported for SiO2-PEG/PEG mixtures. This enhanced mixing ceases above a critical Mw,PMMA, where it is found that PMMA chains wet a sufficiently large number of SiO2-PEG particles to bridge and thereby destabilize the composites.
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Affiliation(s)
- Rahul Mangal
- Robert F. Smith School of Chemical and Biomolecular Engineering and ‡Sibley School of Mechanical and Aerospace Engineering, Cornell University , Ithaca, New York 14853, United States
| | - Pooja Nath
- Robert F. Smith School of Chemical and Biomolecular Engineering and ‡Sibley School of Mechanical and Aerospace Engineering, Cornell University , Ithaca, New York 14853, United States
| | - Mukul Tikekar
- Robert F. Smith School of Chemical and Biomolecular Engineering and ‡Sibley School of Mechanical and Aerospace Engineering, Cornell University , Ithaca, New York 14853, United States
| | - Lynden A Archer
- Robert F. Smith School of Chemical and Biomolecular Engineering and ‡Sibley School of Mechanical and Aerospace Engineering, Cornell University , Ithaca, New York 14853, United States
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