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Naruse S, Muroyama H, Matsui T, Eguchi K. Adaptability of Heteropolytungstate Anions as Efficient Anode Redox Mediators in Redox Flow Polymer Electrolyte Fuel Cells. CHEMSUSCHEM 2024; 17:e202301305. [PMID: 38628077 DOI: 10.1002/cssc.202301305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 04/11/2024] [Indexed: 09/25/2024]
Abstract
Heteropolyanions (HPAs) are known as the candidate for an anode redox mediator for redox flow polymer electrolyte fuel cells (PEFCs). The electrochemical properties of HPAs differ depending on the transition elements and heteroatoms in HPAs. For example, heteropolytungstate anions (W-HPAs), in which the transition element is tungsten, have a lower one-electron reduction potential than other HPAs. Therefore, it has been reported that redox flow PEFCs adapted with W-HPAs exhibit high power generation performance. On the other hand, studies on the heteroatoms of HPAs are limited only to electrochemical properties, and statistical and comprehensive studies on the power generation performance of redox flow PEFCs are lacking. Thus, it is beneficial to clarify the optimal heteroatom in order to design anolytes suitable for redox flow PEFCs. In this study, heteropolytungstate anions with different heteroatoms were adapted as anodic redox mediators in a redox flow PEFC. In power generation tests, the redox flow PEFC with an anolyte of zinctungstate anion showed the highest performance. Zinctungstate anion exhibited the fastest reduction and oxidation rates among the W-HPAs investigated in this study.
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Affiliation(s)
- Shinji Naruse
- Energy and Hydrocarbon Chemistry, Kyoto University Faculty of Engineering Graduate School of Engineering Katsura campus, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Hiroki Muroyama
- Energy and Hydrocarbon Chemistry, Kyoto University Faculty of Engineering Graduate School of Engineering Katsura campus, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Toshiaki Matsui
- Energy and Hydrocarbon Chemistry, Kyoto University Faculty of Engineering Graduate School of Engineering Katsura campus, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Koichi Eguchi
- Energy and Hydrocarbon Chemistry, Kyoto University Faculty of Engineering Graduate School of Engineering Katsura campus, Nishikyo-ku, Kyoto, 615-8510, Japan
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2
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Ilbeygi H, Jaafar J. Recent Progress on Functionalized Nanoporous Heteropoly Acids: From Synthesis to Applications. CHEM REC 2024; 24:e202400043. [PMID: 38874111 DOI: 10.1002/tcr.202400043] [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: 02/28/2024] [Revised: 05/18/2024] [Indexed: 06/15/2024]
Abstract
Functionalized nanoporous heteropoly acids (HPAs) have garnered significant attention in recent years due to their enhanced surface area and porosity, as well as their potential for low-cost regeneration compared to bulk materials. This review aims to provide an overview of the recent advancements in the synthesis and applications of functionalized HPAs. We begin by introducing the fundamental properties of HPAs and their unique structure, followed by a comprehensive overview of the various approaches employed for the synthesis of functionalized HPAs, including salts, anchoring onto supports, and implementing mesoporous silica sieves. The potential applications of functionalized HPAs in various fields are also discussed, highlighting their boosted performance in a wide range of applications. Finally, we address the current challenges and present future prospects in the development of functionalized HPAs, particularly in the context of mesoporous HPAs. This review aims to provide a comprehensive summary of the recent progress in the field, highlighting the significant advancements made in the synthesis and applications of functionalized HPAs.
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Affiliation(s)
- Hamid Ilbeygi
- Battery Research and Innovation Hub, Institute of Frontier Materials, Deakin University, Burwood, VIC 3125, Australia
- ARC Research Hub for Integrated Devices for End-user Analysis at Low-levels (IDEAL), Future Industries Institute, STEM, University of South Australia, Mawson Lakes, SA 5095, Australia
| | - Juhana Jaafar
- N29a, Advanced Membrane Technology Research Centre, School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
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3
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Rezić I, Meštrović E. Challenges of Green Transition in Polymer Production: Applications in Zero Energy Innovations and Hydrogen Storage. Polymers (Basel) 2024; 16:1310. [PMID: 38794503 PMCID: PMC11124979 DOI: 10.3390/polym16101310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/21/2024] [Accepted: 04/29/2024] [Indexed: 05/26/2024] Open
Abstract
The green transition in the sustainable production and processing of polymers poses multifaceted challenges that demand integral comprehensive solutions. Specific problems of presences of toxic trace elements are often missed and this prevents shifting towards eco-friendly alternatives. Therefore, substantial research and the development of novel approaches is needed to discover and implement innovative, sustainable production materials and methods. This paper is focused on the most vital problems of the green transition from the aspect of establishing universally accepted criteria for the characterization and classification of eco-friendly polymers, which is essential to ensuring transparency and trust among consumers. Additionally, the recycling infrastructure needs substantial improvement to manage the end-of-life stage of polymer products effectively. Moreover, the lack of standardized regulations and certifications for sustainable polymers adds to the complexity of this problem. In this paper we propose solutions from the aspect of standardization protocols for the characterization of polymers foreseen as materials that should be used in Zero Energy Innovations in Hydrogen Storage. The role model standards originate from eco-labeling procedures for materials that come into direct or prolonged contact with human skin, and that are monitored by different methods and testing procedures. In conclusion, the challenges of transitioning to green practices in polymer production and processing demands a concerted effort from experts in the field which need to emphasize the problems of the analysis of toxic ultra trace and trace impurities in samples that will be used in hydrogen storage, as trace impurities may cause terrific obstacles due to their decreasing the safety of materials. Overcoming these obstacles requires the development and application of current state-of-the-art methodologies for monitoring the quality of polymers during their recycling, processing, and using, as well as the development of other technological innovations, financial initiatives, and a collective commitment to fostering a sustainable and environmentally responsible future for the polymer industry and innovations in the field of zero energy applications.
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Affiliation(s)
- Iva Rezić
- Department of Applied Chemistry, Faculty of Textile Technology, University of Zagreb, 10000 Zagreb, Croatia
| | - Ernest Meštrović
- Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia;
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Safronova EY, Lysova AA, Voropaeva DY, Yaroslavtsev AB. Approaches to the Modification of Perfluorosulfonic Acid Membranes. MEMBRANES 2023; 13:721. [PMID: 37623782 PMCID: PMC10456953 DOI: 10.3390/membranes13080721] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 08/01/2023] [Accepted: 08/05/2023] [Indexed: 08/26/2023]
Abstract
Polymer ion-exchange membranes are featured in a variety of modern technologies including separation, concentration and purification of gases and liquids, chemical and electrochemical synthesis, and hydrogen power generation. In addition to transport properties, the strength, elasticity, and chemical stability of such materials are important characteristics for practical applications. Perfluorosulfonic acid (PFSA) membranes are characterized by an optimal combination of these properties. Today, one of the most well-known practical applications of PFSA membranes is the development of fuel cells. Some disadvantages of PFSA membranes, such as low conductivity at low humidity and high temperature limit their application. The approaches to optimization of properties are modification of commercial PFSA membranes and polymers by incorporation of different additive or pretreatment. This review summarizes the approaches to their modification, which will allow the creation of materials with a different set of functional properties, differing in ion transport (first of all proton conductivity) and selectivity, based on commercially available samples. These approaches include the use of different treatment techniques as well as the creation of hybrid materials containing dopant nanoparticles. Modification of the intrapore space of the membrane was shown to be a way of targeting the key functional properties of the membranes.
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Affiliation(s)
- Ekaterina Yu. Safronova
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Avenue, 31, 119991 Moscow, Russia; (A.A.L.); (D.Y.V.); (A.B.Y.)
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5
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Yu Y, Zeng Z, Gao X, Xiong C, Zhu H, Cen H, Zheng X, Liu Q, Hu T, Wu C. A Maximization of the Proton Conductivity of Sulfonated Poly(Ether Ether Ketone) with Grafted Segments Containing Multiple, Flexible Propanesulfonic Acid Groups. Macromol Rapid Commun 2023; 44:e2200926. [PMID: 36527198 DOI: 10.1002/marc.202200926] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Indexed: 12/23/2022]
Abstract
To enhance the proton conductivity of sulfonated poly(ether ether ketone) (SPEEK), proton-conducting groups are required to be covalently connected to SPEEK and form proton-conducting channels. Herein, SPEEK fully grafted with segments containing multiple, flexible propanesulfonic acid groups (MS-SPEEK-102) is successfully prepared. Compared with SPEEK, MS-SPEEK-102 exhibits a higher proton conductivity of 8.3 × 10-2 S cm-1 at 80 °C with 98% relative humidity, and consequently a greater power density of 0.530 W cm-2 at 60 °C. These can be ascribed to the increased number of sulfonic acid groups, and ample, uninterrupted proton-conducting channels constructed by the movement of the maximum content, flexible side-chain segments. This approach offers an idea for obtaining a proton exchange membrane with good proton conductivity based on SPEEK.
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Affiliation(s)
- Yang Yu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, Hubei, 430068, P. R. China
| | - Zheng Zeng
- Jingmen City Huafu Polymeric Materials Co., Ltd., Jingmen, Hubei, 448000, P. R. China
| | - Xuesong Gao
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, Hubei, 430068, P. R. China
| | - Chunyong Xiong
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, Hubei, 430068, P. R. China
| | - Huamei Zhu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, Hubei, 430068, P. R. China
| | - Hongyu Cen
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, Hubei, 430068, P. R. China
- Hubei Longzhong Laboratory, Xiangyang, Hubei, 441000, P. R. China
| | - Xuan Zheng
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, Hubei, 430068, P. R. China
- Hubei Longzhong Laboratory, Xiangyang, Hubei, 441000, P. R. China
| | - Qingting Liu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, Hubei, 430068, P. R. China
- Hubei Longzhong Laboratory, Xiangyang, Hubei, 441000, P. R. China
| | - Tao Hu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, Hubei, 430068, P. R. China
- Hubei Longzhong Laboratory, Xiangyang, Hubei, 441000, P. R. China
| | - Chonggang Wu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, and School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, Hubei, 430068, P. R. China
- Hubei Longzhong Laboratory, Xiangyang, Hubei, 441000, P. R. China
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6
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Wang C, Song Y, Cong W, Yan Y, Wang M, Zhou J. From surface loading to precise confinement of polyoxometalates for electrochemical energy storage. CHINESE CHEM LETT 2023. [DOI: 10.1016/j.cclet.2023.108194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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7
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Vedula SS, Yadav GD. Synthesis and application of environment friendly membranes of chitosan and chitosan-PTA for removal of copper (II) from wastewater. Chem Ind 2022. [DOI: 10.1080/00194506.2022.2093636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Shivani S. Vedula
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai, India
| | - Ganapati D. Yadav
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai, India
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8
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Li W, Wang H, Zhang J, Xiang Y, Lu S. Advancements of Polyvinylpyrrolidone-Based Polymer Electrolyte Membranes for Electrochemical Energy Conversion and Storage Devices. CHEMSUSCHEM 2022; 15:e202200071. [PMID: 35318798 DOI: 10.1002/cssc.202200071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 03/12/2022] [Indexed: 06/14/2023]
Abstract
Polymer electrolyte membranes (PEMs) play vital roles in electrochemical energy conversion and storage devices, such as polymer electrolyte membrane fuel cell (PEMFC), redox flow battery, and water electrolysis. As the crucial component of these devices, PEMs need to possess high ion conductivity and electronic insulation, remarkable mechanical and chemical stability, and outstanding isolation function for the materials on both sides of the cathode and anode. Polyvinylpyrrolidone has received widespread attention in the research of PEMs owing to its tertiary amine basic groups and exceptional hydrophilic properties. This review focuses on the application status of polyvinylpyrrolidone-based PEMs in PEMFC, vanadium redox flow battery, and alkaline water electrolysis, and describes in detail the key scientific problems in these fields, providing constructive suggestions and guidance for the application of polyvinylpyrrolidone-based PEMs in electrochemical energy conversion and storage devices.
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Affiliation(s)
- Wen Li
- Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing, 100191, P. R. China
| | - Haining Wang
- Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing, 100191, P. R. China
| | - Jin Zhang
- Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing, 100191, P. R. China
| | - Yan Xiang
- Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing, 100191, P. R. China
| | - Shanfu Lu
- Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing, 100191, P. R. China
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9
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Hassan Oghli A, Soleymanpour A. One-step electrochemical modification of pencil graphite electrode with reduced graphene oxide/phosphotungstic acid/sol–gel, and its application to the trace analysis of lead(II). Microchem J 2022. [DOI: 10.1016/j.microc.2021.107034] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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10
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Renzi M, Nobili F, Miecznikowski K, Kostuch A, Wadas A, Rutkowska IA, Kulesza PJ. Activation of bimetallic PtFe nanoparticles with zeolite-type cesium salts of vanadium-substituted polyoxometallates toward electroreduction of oxygen at low Pt loadings for fuel cells. J Solid State Electrochem 2021. [DOI: 10.1007/s10008-021-05088-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
AbstractThe catalytic activity of commercial carbon-supported PtFe (PtFe/C) nanoparticles admixed with mesoporous polyoxometalate Cs3H3PMo9V3O40, (POM3-3–9), has been evaluated towards oxygen reduction reaction (ORR) in acid medium. The polyoxometalate cesium salt co-catalyst/co-support has been prepared by titration using the aqueous solution of phosphovanadomolibdic acid. The synthesized material has been characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The results confirm formation of the polyoxometalate salt with the characteristic Keggin-type structure. The composite catalyst has been prepared by mixing the POM3-3–9 sample with the commercial PtFe/C by sonication. The diagnostic rotating ring-disk voltammetric studies are consistent with good performance of the system with low Pt loading during ORR. The fuel cell membrane electrode assembly (MEA) utilizing the PtFe/POM-based cathode has exhibited comparable or better performance (at relative humidity on the level of 100, 62, and 17%), in comparison to the commercial MEA with higher Pt loading at the cathode. Furthermore, based on the cell potential and power density polarization curves, noticeable improvements in the fuel cell behavior have been observed at the low relative humidity (17%). Finally, the accelerated stress test, which uses the potential square wave between 0.4 V and 0.8 V, has been performed to evaluate MEA stability for at least 100 h. It has been demonstrated that, after initial losses, the proposed catalytic system seems to retain stable performance and good morphological rigidity.
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Fabrication of Polyelectrolyte Membranes of Pectin Graft-Copolymers with PVA and Their Composites with Phosphomolybdic Acid for Drug Delivery, Toxic Metal Ion Removal, and Fuel Cell Applications. MEMBRANES 2021; 11:membranes11100792. [PMID: 34677559 PMCID: PMC8537921 DOI: 10.3390/membranes11100792] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/06/2021] [Accepted: 10/11/2021] [Indexed: 11/16/2022]
Abstract
In this study, a simple method for the fabrication of highly diffusive, adsorptive and conductive eco-friendly polyelectrolyte membranes (PEMs) with sulfonate functionalized pectin and poly(vinyl alcohol)(PVA) was established. The graft-copolymers were synthesized by employing the use of potassium persulfate as a free radical initiator from pectin (PC), a carbohydrate polymer with 2-acrylamido-2-methyl-1-propanesulphonic acid (AMPS) and sodium 4-vinylbenzene sulphonate (SVBS). The PEMs were fabricated from the blends of pectin graft-copolymers (PC-g-AMPS and PC-g-SVBS) and PVA by using a solution casting method, followed by chemical crosslinking with glutaraldehyde. The composite PEMs were fabricated by mixing phosphomolybdic acid with the aforementioned blends. The PEMs were successfully characterized by FTIR, XRD, SEM, and EDAX studies. They were assessed for the controlled release of an anti-cancer drug (5-fluorouracil) and the removal of toxic metal ions (Cu2+) from aqueous media. Furthermore, the composite PEMs were evaluated for fuel cell application. The 5-fluorouracil release capacity of the PEMs was found to be 93% and 99.1% at 300 min in a phosphate buffer solution (pH = 7.4). The highest Cu2+ removal was observed at 206.7 and 190.1 mg/g. The phosphomolybdic acid-embedded PEMs showed superior methanol permeability, i.e., 6.83 × 10−5, and 5.94 × 10−5, compared to the pristine PEMs. Furthermore, the same trend was observed for the proton conductivities, i.e., 13.77 × 10−3, and 18.6 × 10−3 S/cm at 30 °C.
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Vijitha R, Nagaraja K, Hanafiah MM, Rao KM, Venkateswarlu K, Lakkaboyana SK, Rao KSVK. Fabrication of Eco-Friendly Polyelectrolyte Membranes Based on Sulfonate Grafted Sodium Alginate for Drug Delivery, Toxic Metal Ion Removal and Fuel Cell Applications. Polymers (Basel) 2021; 13:polym13193293. [PMID: 34641109 PMCID: PMC8512661 DOI: 10.3390/polym13193293] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 09/22/2021] [Accepted: 09/24/2021] [Indexed: 11/16/2022] Open
Abstract
Polyelectrolyte membranes (PEMs) are a novel type of material that is in high demand in health, energy and environmental sectors. If environmentally benign materials are created with biodegradable ones, PEMs can evolve into practical technology. In this work, we have fabricated environmentally safe and economic PEMs based on sulfonate grafted sodium alginate (SA) and poly(vinyl alcohol) (PVA). In the first step, 2-acrylamido-2-methyl-1-propanesulphonic acid (AMPS) and sodium 4-vinylbenzene sulfonate (SVBS) are grafted on to SA by utilizing the simple free radical polymerization technique. Graft copolymers (SA-g-AMPS and SA-g-SVBS) were characterized by 1H NMR, FTIR, XRD and DSC. In the second step, sulfonated SA was successfully blended with PVA to fabricate PEMs for the in vitro controlled release of 5-fluorouracil (anti-cancer drug) at pH 1.2 and 7.4 and to remove copper (II) ions from aqueous media. Moreover, phosphomolybdic acids (PMAs) incorporated with composite PEMs were developed to evaluate fuel cell characteristics, i.e., ion exchange capacity, oxidative stability, proton conductivity and methanol permeability. Fabricated PEMs are characterized by the FTIR, ATR-FTIR, XRD, SEM and EDAX. PMA was incorporated. PEMs demonstrated maximum encapsulation efficiency of 5FU, i.e., 78 ± 2.3%, and released the drug maximum in pH 7.4 buffer. The maximum Cu(II) removal was observed at 188.91 and 181.22 mg.g–1. PMA incorporated with PEMs exhibited significant proton conductivity (59.23 and 45.66 mS/cm) and low methanol permeability (2.19 and 2.04 × 10−6 cm2/s).
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Affiliation(s)
- Raagala Vijitha
- Polymer Biomaterial Design and Synthesis Laboratory, Department of Chemistry, Yogi Vemana University, Kadapa 516005, Andhra Pradesh, India; (R.V.); (K.N.)
| | - Kasula Nagaraja
- Polymer Biomaterial Design and Synthesis Laboratory, Department of Chemistry, Yogi Vemana University, Kadapa 516005, Andhra Pradesh, India; (R.V.); (K.N.)
| | - Marlia M. Hanafiah
- Department of Earth Sciences and Environment, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia;
- Centre for Tropical Climate Change System, Institute of Climate Change, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia
| | - Kummara Madhusudana Rao
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan-si 38541, Gyeongsangbuk-do, Korea
- Correspondence: (K.M.R.); (K.S.V.K.R.); Tel.: +91-970-427-8890 (K.S.V.K.R.)
| | - Katta Venkateswarlu
- Laboratory for Synthetic & Natural Products Chemistry, Department of Chemistry, Yogi Vemana University, Kadapa 516005, Andhra Pradesh, India;
| | | | - Kummari S. V. Krishna Rao
- Polymer Biomaterial Design and Synthesis Laboratory, Department of Chemistry, Yogi Vemana University, Kadapa 516005, Andhra Pradesh, India; (R.V.); (K.N.)
- Correspondence: (K.M.R.); (K.S.V.K.R.); Tel.: +91-970-427-8890 (K.S.V.K.R.)
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13
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Wu X, Wu Q. Synthesis and high proton conductivity of an indium-substituted Keggin-type quaternary heteropoly acid. Dalton Trans 2021; 50:6793-6796. [PMID: 33978021 DOI: 10.1039/d1dt00966d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and characterization of an indium-substituted quaternary heteropoly acid with a Keggin structure, H4[In(H2O)PW9Mo2O39]·11H2O (PMo9W2In), is reported. At 18 °C under 80% relative humidity, PMo9W2In displays protonic conductivity of 2.32 × 10-4 S cm-1 with an activation energy of 35.52 kJ mol-1, indicating that it is a potential solid protonic conductor following the vehicle mechanism. Its conductivity increases with temperature in the measured temperature range.
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Affiliation(s)
- Xuefei Wu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, PR China.
| | - Qingyin Wu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, PR China.
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Abstract
Hybrid organic-inorganic catalysts have been extensively investigated by several research groups in the last decades, as they allow combining the structural robust-ness of inorganic solids with the versatility of organic chemistry. Within the field of hybrid catalysts, synthetic strategies based on silica are among the most exploitable, due to the convenience of sol-gel chemistry, to the array of silyl-derivative precursors that can be synthesized and to the number of post-synthetic functionalization strategies available, amongst others. This review proposes to highlight these advantages, firstly describing the most common synthetic tools and the chemistry behind sol-gel syntheses of hybrid catalysts, then presenting exemplificative studies involving mono- and multi-functional silica-based hybrid catalysts featuring different types of active sites (acid, base, redox). Materials obtained through different approaches are described and their properties, as well as their catalytic performances, are compared. The general scope of this review is to gather useful information for those approaching the synthesis of organic-inorganic hybrid materials, while providing an overview on the state-of-the art in the synthesis of such materials and highlighting their capacities.
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15
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Dehghani Sanij F, Balakrishnan P, Su H, Khotseng L, Xu Q. Fabrication of polyoxometalate-modified palladium–nickel/reduced graphene oxide alloy catalysts for enhanced oxygen reduction reaction activity. RSC Adv 2021; 11:39118-39129. [PMID: 35492496 PMCID: PMC9044417 DOI: 10.1039/d1ra06936e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 11/29/2021] [Indexed: 11/21/2022] Open
Abstract
A novel nanocatalyst, polyoxometalate-modified palladium–nickel/reduced graphene oxide (Pd8Ni2/rGO-POM), is prepared and served as an effective ORR nanomaterial in alkaline media.
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Affiliation(s)
| | | | - Huaneng Su
- Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China
| | - Lindiwe Khotseng
- Department of Chemistry, University of the Western Cape, Cape Town 7535, South Africa
| | - Qian Xu
- Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China
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16
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Mahato N, Jang H, Dhyani A, Cho S. Recent Progress in Conducting Polymers for Hydrogen Storage and Fuel Cell Applications. Polymers (Basel) 2020; 12:E2480. [PMID: 33114547 PMCID: PMC7693427 DOI: 10.3390/polym12112480] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/20/2020] [Accepted: 10/21/2020] [Indexed: 11/16/2022] Open
Abstract
Hydrogen is a clean fuel and an abundant renewable energy resource. In recent years, huge scientific attention has been invested to invent suitable materials for its safe storage. Conducting polymers has been extensively investigated as a potential hydrogen storage and fuel cell membrane due to the low cost, ease of synthesis and processability to achieve the desired morphological and microstructural architecture, ease of doping and composite formation, chemical stability and functional properties. The review presents the recent progress in the direction of material selection, modification to achieve appropriate morphology and adsorbent properties, chemical and thermal stabilities. Polyaniline is the most explored material for hydrogen storage. Polypyrrole and polythiophene has also been explored to some extent. Activated carbons derived from conducting polymers have shown the highest specific surface area and significant storage. This review also covers recent advances in the field of proton conducting solid polymer electrolyte membranes in fuel cells application. This review focuses on the basic structure, synthesis and working mechanisms of the polymer materials and critically discusses their relative merits.
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Affiliation(s)
- Neelima Mahato
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Korea; (N.M.); (H.J.)
| | - Hyeji Jang
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Korea; (N.M.); (H.J.)
| | - Archana Dhyani
- Department of Applied Sciences, School of Engineering, University of Petroleum and Energy Studies, Dehradun, Uttarakhand 248007, India;
| | - Sunghun Cho
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Korea; (N.M.); (H.J.)
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Self-Humidifying Proton Exchange Membranes for Fuel Cell Applications: Advances and Challenges. Processes (Basel) 2020. [DOI: 10.3390/pr8091069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Polymer electrolyte fuel cells (PEFCs) provide efficient and carbon-free power by converting the hydrogen chemical energy. The PEFCs can reach their greatest performance in humidified condition, as proton exchange membranes (PEMs) should be humidified for their proton transportation function. Thus, external humidifiers are commonly employed to increase the water content of reactants. However, being burdened with external humidifiers can make the control of PEFCs complicated and costly, in particular for transportation application. To overcome this issue, self-humidifying PEMs have been introduced, with which PEFC can be fed by dry reactants. In fact, internal humidification is accomplished by produced water from the recombination of permeated hydrogen and oxygen gases on the incorporated platinum catalysts within the PEM. While the water production agent remains constant, there is a broad range of additives that are utilized to retain the generated water and facilitate the proton conduction path in the PEM. This review paper has classified the aforementioned additives in three categories: inorganic materials, proton-conductive materials, and carbon-based additives. Moreover, synthesis methods, preparation procedures, and characterization tests are overviewed. Eventually, self-humidifying PEMs endowed with platinum and different additives are compared from performance and stability perspectives, such as water uptake, proton conductivity, fuel cell performance, gas cross-over, and the overall durability. In addition, their challenges and possible solutions are reviewed. Considering the concerns regarding the long-term durability of such PEMs, it seems that further investigations can be beneficial to confirm their reliability for prolonged PEFC operation.
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18
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Unmodified and modified copper polyoxometalates as catalysts for oxidation of alkenes: Kinetic and mechanistic investigation. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119757] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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Zhang J, Aili D, Lu S, Li Q, Jiang SP. Advancement toward Polymer Electrolyte Membrane Fuel Cells at Elevated Temperatures. RESEARCH 2020; 2020:9089405. [PMID: 32566932 PMCID: PMC7298353 DOI: 10.34133/2020/9089405] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 04/08/2020] [Indexed: 11/18/2022]
Abstract
Elevation of operational temperatures of polymer electrolyte membrane fuel cells (PEMFCs) has been demonstrated with phosphoric acid-doped polybenzimidazole (PA/PBI) membranes. The technical perspective of the technology is simplified construction and operation with possible integration with, e.g., methanol reformers. Toward this target, significant efforts have been made to develop acid-base polymer membranes, inorganic proton conductors, and organic-inorganic composite materials. This report is devoted to updating the recent progress of the development particularly of acid-doped PBI, phosphate-based solid inorganic proton conductors, and their composite electrolytes. Long-term stability of PBI membranes has been well documented, however, at typical temperatures of 160°C. Inorganic proton-conducting materials, e.g., alkali metal dihydrogen phosphates, heteropolyacids, tetravalent metal pyrophosphates, and phosphosilicates, exhibit significant proton conductivity at temperatures of up to 300°C but have so far found limited applications in the form of thin films. Composite membranes of PBI and phosphates, particularly in situ formed phosphosilicates in the polymer matrix, showed exceptionally stable conductivity at temperatures well above 200°C. Fuel cell tests at up to 260°C are reported operational with good tolerance of up to 16% CO in hydrogen, fast kinetics for direct methanol oxidation, and feasibility of nonprecious metal catalysts. The prospect and future exploration of new proton conductors based on phosphate immobilization and fuel cell technologies at temperatures above 200°C are discussed.
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Affiliation(s)
- Jin Zhang
- Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices & School of Space and Environment, Beihang University, Beijing 100191, China
| | - David Aili
- Department of Energy Conversion and Storage, Technical University of Denmark, Fysikvej 310, 2800 Lyngby, Denmark
| | - Shanfu Lu
- Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices & School of Space and Environment, Beihang University, Beijing 100191, China
| | - Qingfeng Li
- Department of Energy Conversion and Storage, Technical University of Denmark, Fysikvej 310, 2800 Lyngby, Denmark
| | - San Ping Jiang
- Fuels and Energy Technology Institute & WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, WA6102, Perth, Australia
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20
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Ma W, Hu B, Jing K, Li Z, Jin J, Zheng S, Huang X. Proton-conducting layered structures based on transition metal oxo-clusters supported by Sb(iii) tartrate scaffolds. Dalton Trans 2020; 49:3849-3855. [PMID: 31848553 DOI: 10.1039/c9dt04333k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Two transition metal-antimony oxo-cluster based compounds, H5{MCd(H2O)6[M(H2O)3Co3SbVSb(μ3-O)8(l-tta)6]}·7H2O (1) (M = Cd0.5 + Co0.5) and H3K5(H2O)11{Cd(H2O)4[Cd(H2O)Fe4Cd2Sb6(μ4-O)5(μ3-O)3(l-tta)6][Cd(H2O)2Fe4Cd2Sb6(μ4-O)4(μ3-O)4(l-tta)6][Cd(H2O)2Fe4Cd2Sb6(μ4-O)4(μ3-O)4(l-tta)6Cd(H2O)5]}·17H2O (2) (L-H4tta = l-tartaric acid) were hydrothermally synthesized and characterized. Compound 1 features a [MCo3SbVSb(μ3-O)8(l-tta)6(H2O)3]9- cluster, while compound 2 contains three types of clusters, namely, [Cd(H2O)Fe4Cd2Sb6(μ4-O)5(μ3-O)3(l-tta)6]4-, [Cd(H2O)2Fe4Cd2Sb6(μ4-O)4(μ3-O)4(l-tta)6]4- and [Cd(H2O)2Fe4Cd2Sb6(μ4-O)4(μ3-O)4(l-tta)6Cd(H2O)5]2-. All the clusters are of sandwich-type with {Sb3(μ3-O)(l-tta)} scaffolds on the top and bottom. The Cd (and M in 1) ions interconnect the clusters into layered structures in both compounds. To the best of our knowledge, this is the first report of transition metal-antimony oxo-clusters that simultaneously contain the first-row and second-raw transition metal ions, and compound 1 represents the first example of such type of clusters that contain Sb(v). The two compounds exhibit proton conductivity with the values of 2.43 × 10-3 and 2.95 × 10-3 S cm-1 at 85 °C under 98% relative humidity, respectively.
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Affiliation(s)
- Wen Ma
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
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21
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Di Franco F, Zaffora A, Burgio G, Santamaria M. Performance of H2-fed fuel cell with chitosan/silicotungstic acid membrane as proton conductor. J APPL ELECTROCHEM 2020. [DOI: 10.1007/s10800-019-01394-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Rath R, Kumar P, Unnikrishnan L, Mohanty S, Nayak SK. Current Scenario of Poly (2,5-Benzimidazole) (ABPBI) as Prospective PEM for Application in HT-PEMFC. POLYM REV 2019. [DOI: 10.1080/15583724.2019.1663211] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Rosalin Rath
- School for Advanced Research in Polymers (SARP), Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Plastics Engineering & Technology (CIPET), Bhubaneswar, Odisha, India
| | - Piyush Kumar
- School for Advanced Research in Polymers (SARP), Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Plastics Engineering & Technology (CIPET), Bhubaneswar, Odisha, India
| | - Lakshmi Unnikrishnan
- School for Advanced Research in Polymers (SARP), Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Plastics Engineering & Technology (CIPET), Bhubaneswar, Odisha, India
| | - Smita Mohanty
- School for Advanced Research in Polymers (SARP), Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Plastics Engineering & Technology (CIPET), Bhubaneswar, Odisha, India
| | - Sanjay K. Nayak
- School for Advanced Research in Polymers (SARP), Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Plastics Engineering & Technology (CIPET), Bhubaneswar, Odisha, India
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23
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Zhai L, Li H. Polyoxometalate-Polymer Hybrid Materials as Proton Exchange Membranes for Fuel Cell Applications. Molecules 2019; 24:E3425. [PMID: 31547150 PMCID: PMC6803900 DOI: 10.3390/molecules24193425] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 09/17/2019] [Accepted: 09/19/2019] [Indexed: 11/16/2022] Open
Abstract
As one of the most efficient pathways to provide clean energy, fuel cells have attracted great attention in both academic and industrial communities. Proton exchange membranes (PEMs) or proton-conducting electrolytes are the key components in fuel cell devices, which require the characteristics of high proton conductivity as well as high mechanical, chemical and thermal stabilities. Organic-inorganic hybrid PEMs can provide a fantastic platform to combine both advantages of two components to meet these demands. Due to their extremely high proton conductivity, good thermal stability and chemical adjustability, polyoxometalates (POMs) are regarded as promising building blocks for hybrid PEMs. In this review, we summarize a number of research works on the progress of POM-polymer hybrid materials and related applications in PEMs. Firstly, a brief background of POMs and their proton-conducting properties are introduced; then, the hybridization strategies of POMs with polymer moieties are discussed from the aspects of both noncovalent and covalent concepts; and finally, we focus on the performance of these hybrid materials in PEMs, especially the advances in the last five years. This review will provide a better understanding of the challenges and perspectives of POM-polymer hybrid PEMs for future fuel cell applications.
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Affiliation(s)
- Liang Zhai
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China.
| | - Haolong Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China.
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24
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Liang S, Nie YM, Li SH, Zhou JL, Yan J. A Comprehensive Study on the Dye Adsorption Behavior of Polyoxometalate-Complex Nano-Hybrids Containing Classic β-Octamolybdate and Biimidazole Units. Molecules 2019; 24:E806. [PMID: 30813387 PMCID: PMC6412703 DOI: 10.3390/molecules24040806] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 02/08/2019] [Accepted: 02/11/2019] [Indexed: 11/16/2022] Open
Abstract
Six new hybrids based on β-[Mo₈O26]4- polyoxometalates, [Ni(H₂biim)₃]₂[β-Mo₈O26]•8DMF(1); (DMA)₂[M(H₂biim)₂(H₂O)₂][β-Mo₈O26]•4DMF (M = Ni (2), Co (3)), DMA = dimethyl-ammonium, H₂biim=2,2'-biimidazole); [M(H₂biim)(DMF)₃]₂[β-Mo₈O26]•2DMF (M = Zn (4), Cu (5)); [(DMA)₂[Cu(DMF)₄][β-Mo₈O26]•2DMF]n (6), have been successfully synthesized and characterized. Compounds 2⁻5 show favorable capacity to adsorb methylene blue (MB) at room temperature, and they can selectively capture MB molecules from binary-mixture solutions of MB/MO (MO = Methyl Orange), or MB/RhB (RhB = Rhodamine B). Compound 3 can uptake up to 521.7 mg g-1 MB cationic dyes rapidly, which perform the maximum adsorption in an hour among the reported materials as far as we know. The compounds are stable and still work very efficiently after three cycles. For compound 3, the preliminary adsorption mechanism studies indicated that the adsorption is an ion exchange process and the adsorption behavior of polyoxometalate-complex can be benefited from additional exchangeable protons in the complex cations.
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Affiliation(s)
- Shuang Liang
- School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
| | - Yan-Mei Nie
- School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
| | - Sang-Hao Li
- School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
| | - Jian-Liang Zhou
- School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
| | - Jun Yan
- Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, Hunan, China.
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25
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Akbari S, Hamed Mosavian MT, Moosavi F, Ahmadpour A. Elucidating the morphological aspects and proton dynamics in a hybrid perfluorosulfonic acid membrane for medium-temperature fuel cell applications. Phys Chem Chem Phys 2018; 20:29778-29789. [PMID: 30462118 DOI: 10.1039/c8cp05377d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A perfluorosulfonic acid (PFSA) membrane, i.e. Nafion® 117, was doped with the heteropoly salts (HPS) Cs3PW12O40, Rb3PW12O40, and (NH4)3PW12O40. Also, composite membranes with CsxH3-xPW12O40 (x = 1, 2, and 3) as dopants were investigated, which were rendered insoluble by substituting protons with larger cations. Morphological assessment and a detailed analysis of the hopping events via SAXS measurement and analysis of the hydrogen bond networks were performed using classical and quantum hopping molecular dynamics simulation. The phase segregation decreased by increasing the extent proton substitution in HPA. HPS containing cations with a larger ionic radius induced smaller phase segregation in the membrane, as confirmed by the RDF plots. SAXS simulation revealed that the hydrophilic phase domains in the HPS-doped Nafion® membrane were spaced further apart than that in the HPA-doped membrane. Although there was a greater number of isolated clusters for the Cs3PW12O40-doped Nafion®, the average number of cluster decreased with an increase in the substitution cation/proton ratio and ionic radius of the cation. The analysis of the H-bond network stability revealed that the proton hops slower when the membrane contains HPS particles and the mean residence time of a proton on water molecules increases with an increase in the extent of proton substitution in H3PW12O40. Indeed, for the HPA-doped membrane, the diffusion of water molecules is lower than that in the HPS-doped system.
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Affiliation(s)
- Saeed Akbari
- Chemical Engineering Department, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran.
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26
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Sadjadi S, M. Heravi M, Zadsirjan V, Beheshtiha SYS, Kelishadi RR. HPA@Methenamine‐HNTs: A Novel Catalyst for Promoting One‐Pot and Three‐Component Synthesis of Chromenopyrimidine‐2,5‐Diones and Thioxochromenopyrimidin‐5‐ones in Aqueous Media. ChemistrySelect 2018. [DOI: 10.1002/slct.201801293] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Samahe Sadjadi
- Gas Conversion DepartmentFaculty of PetrochemicalsIran Polymer and Petrochemical Institute PO Box 14975-112, Tehran Iran
| | - Majid M. Heravi
- Department of ChemistrySchool of ScienceAlzahra University POBox 1993891176, Vanak, Tehran Iran
| | - Vahideh Zadsirjan
- Department of ChemistrySchool of ScienceAlzahra University POBox 1993891176, Vanak, Tehran Iran
| | | | - Razieh Rezai Kelishadi
- Department of ChemistrySchool of ScienceAlzahra University POBox 1993891176, Vanak, Tehran Iran
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27
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Geng T, Du C, Cheng X, Xu X, Jian J, He X, Zuo P, Yin G. A multifunctional silicotungstic acid-modified Li-rich manganese-based cathode material with excellent electrochemical properties. J Solid State Electrochem 2018. [DOI: 10.1007/s10008-018-4113-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Kumari M, Sodaye HS, Bindal RC. Effect of phosphotungstic acid blending on properties of sulfonated poly(ether ether ketone)-poly(ethylene glycol) crosslinked membranes. J Appl Polym Sci 2018. [DOI: 10.1002/app.46667] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mamta Kumari
- Membrane Development Section, Chemical Engineering Group, Bhabha Atomic Research Centre; Trombay Mumbai 400085 India
- Homi Bhabha National Institute, Training School Complex; Anushakti Nagar Mumbai 400094 India
| | - Hemant S. Sodaye
- Membrane Development Section, Chemical Engineering Group, Bhabha Atomic Research Centre; Trombay Mumbai 400085 India
- Homi Bhabha National Institute, Training School Complex; Anushakti Nagar Mumbai 400094 India
| | - Ramesh C. Bindal
- Membrane Development Section, Chemical Engineering Group, Bhabha Atomic Research Centre; Trombay Mumbai 400085 India
- Homi Bhabha National Institute, Training School Complex; Anushakti Nagar Mumbai 400094 India
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29
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Jesuraj K, Manimuthu RP. Preparation and Characterization of Hybrid Chitosan/PEO–Silica Membrane Doped with Phosphotungstic Acid for PEM Fuel Cell Application. POLYM-PLAST TECH MAT 2018. [DOI: 10.1080/03602559.2018.1455862] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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30
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Highly efficient charge transfer in Co/Co2P Schottky junctions embedded in nitrogen-doped porous carbon for enhancing bioelectricity generation. Biosens Bioelectron 2018; 102:101-105. [DOI: 10.1016/j.bios.2017.11.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 11/02/2017] [Accepted: 11/04/2017] [Indexed: 11/18/2022]
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31
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Hu J, Wu X, Zhang Q, Gao M, Qiu H, Huang K, Feng S, Wang T, Yang Y, Liu Z, Zhao B. Highly Active PdNi/RGO/Polyoxometalate Nanocomposite Electrocatalyst for Alcohol Oxidation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:2685-2691. [PMID: 29400977 DOI: 10.1021/acs.langmuir.7b04031] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A PdNi/RGO/polyoxometalate nanocomposite has been successfully synthesized by a simple wet-chemical method. Characterizations such as transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction analysis, and X-ray photoelectron spectroscopy are employed to verify the morphology, structure, and elemental composition of the as-prepared nanocomposite. Inspired by the fast-developing fuel cells, the electrochemical catalytic performance of the nanocomposite toward methanol and ethanol oxidation in alkaline media is further tested. Notably, the nanocomposite exhibits excellent catalytic activity and long-term stability toward alcohol electrooxidation compared with the PdNi/RGO and commercial Pd/C catalyst. Furthermore, the electrochemical results reveal that the prepared nanocomposite is attractive as a promising electrocatalyst for direct alcohol fuel cells, in which the phosphotungstic acid plays a crucial role in enhancing the electrocatalytic activities of the catalyst.
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Affiliation(s)
- Jing Hu
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Department of Chemistry & Environmental Engineering, Changchun University of Science and Technology , Changchun, Jilin 130022, P. R. China
| | - Xiaofeng Wu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University , Changchun 130012, P. R. China
| | - Qingfan Zhang
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Department of Chemistry & Environmental Engineering, Changchun University of Science and Technology , Changchun, Jilin 130022, P. R. China
| | - Mingyan Gao
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Department of Chemistry & Environmental Engineering, Changchun University of Science and Technology , Changchun, Jilin 130022, P. R. China
| | - Haifang Qiu
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Department of Chemistry & Environmental Engineering, Changchun University of Science and Technology , Changchun, Jilin 130022, P. R. China
| | - Keke Huang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University , Changchun 130012, P. R. China
| | - Shouhua Feng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University , Changchun 130012, P. R. China
| | - Tingting Wang
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Department of Chemistry & Environmental Engineering, Changchun University of Science and Technology , Changchun, Jilin 130022, P. R. China
| | - Ying Yang
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Department of Chemistry & Environmental Engineering, Changchun University of Science and Technology , Changchun, Jilin 130022, P. R. China
| | - Zhelin Liu
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Department of Chemistry & Environmental Engineering, Changchun University of Science and Technology , Changchun, Jilin 130022, P. R. China
| | - Bo Zhao
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Department of Chemistry & Environmental Engineering, Changchun University of Science and Technology , Changchun, Jilin 130022, P. R. China
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32
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Castañeda LF, Walsh FC, Nava JL, Ponce de León C. Graphite felt as a versatile electrode material: Properties, reaction environment, performance and applications. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.11.165] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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33
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Preparation of a highly active palladium nanoparticle/polyoxometalate/reduced graphene oxide nanocomposite by a simple photoreduction method and its application to the electrooxidation of ethylene glycol and glycerol. Electrochem commun 2017. [DOI: 10.1016/j.elecom.2017.08.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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34
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Safronova EY, Parshina AV, Ryzhkova EA, Bobreshova OV, Yaroslavtsev AB. Effect of modification of the MF-4SC membranes in the potassium form with acid salts of heteropolyacids on membrane properties and characteristics of dp sensors based on them. RUSS J INORG CHEM+ 2016. [DOI: 10.1134/s0036023616120159] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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35
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Albu AM, Maior I, Nicolae CA, Bocăneală FL. NOVEL PVA PROTON CONDUCTING MEMBRANES DOPED WITH POLYANILINE GENERATED BY IN-SITU POLYMERIZATION. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.06.098] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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36
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Matsui T, Morikawa E, Nakada S, Okanishi T, Muroyama H, Hirao Y, Takahashi T, Eguchi K. Polymer Electrolyte Fuel Cells Employing Heteropolyacids as Redox Mediators for Oxygen Reduction Reactions: Pt-Free Cathode Systems. ACS APPLIED MATERIALS & INTERFACES 2016; 8:18119-18125. [PMID: 27348019 DOI: 10.1021/acsami.6b05202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this study, the heteropolyacids of H3+xPVxMO12-xO40 (x = 0, 2, and 3) were applied as redox mediators for the oxygen reduction reaction in polymer electrolyte fuel cells, of which the cathode is free from the usage of noble metals such as Pt/C. In this system, the electrochemical reduction of heteropolyacid over the carbon cathode and the subsequent reoxidation of the partially reduced heteropolyacid by exposure to the dissolved oxygen in the regenerator are important processes for continuous power generation. Thus, the redox properties of catholytes containing these heteropolyacids were investigated in detail. The substitution quantity of V in the heteropolyacid affected the onset reduction potential as well as the reduction current density, resulting in a difference in cell performance. The chemical composition of heteropolyacid also had a significant impact on the reoxidation property. Among the three compounds, H6PV3Mo9O40 was the most suitable redox mediator. Furthermore, the pH of the catholyte was found to be the crucial factor in determining the reoxidation rate of partially reduced heteropolyacid as well as cell performance.
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Affiliation(s)
- Toshiaki Matsui
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University , Nishikyo-ku, Kyoto 615-8510, Japan
| | - Eri Morikawa
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University , Nishikyo-ku, Kyoto 615-8510, Japan
| | - Shintaro Nakada
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University , Nishikyo-ku, Kyoto 615-8510, Japan
| | - Takeou Okanishi
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University , Nishikyo-ku, Kyoto 615-8510, Japan
| | - Hiroki Muroyama
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University , Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yoshifumi Hirao
- Higashifuji Technical Center, Toyota Motor Corporation , Mishuku, Susono, Shizuoka 410-1193, Japan
| | - Tsuyoshi Takahashi
- Higashifuji Technical Center, Toyota Motor Corporation , Mishuku, Susono, Shizuoka 410-1193, Japan
| | - Koichi Eguchi
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University , Nishikyo-ku, Kyoto 615-8510, Japan
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Bera MK, Antonio MR. Aggregation of Heteropolyanions Implicates the Presence of Zundel Ions Near Air-Water Interfaces. ChemistrySelect 2016. [DOI: 10.1002/slct.201600441] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mrinal K. Bera
- Chemical Sciences and Engineering Division; Argonne National Laboratory; Argonne Illinois 60439 United States
- DUBBLE-CRG; ESRF-The European Synchrotron Radiation Facility CS40220; 38043 Grenoble Cedex 9 France
| | - Mark R. Antonio
- Chemical Sciences and Engineering Division; Argonne National Laboratory; Argonne Illinois 60439 United States
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Ye T, Wang J, Dong G, Jiang Y, Feng C, Yang Y. Recent Progress in the Application of Polyoxometalates for Dye-sensitized/Organic Solar Cells. CHINESE J CHEM 2016. [DOI: 10.1002/cjoc.201600231] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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39
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Bera MK, Antonio MR. Crystallization of Keggin Heteropolyanions via a Two-Step Process in Aqueous Solutions. J Am Chem Soc 2016; 138:7282-8. [DOI: 10.1021/jacs.5b13375] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Mrinal K. Bera
- Chemical
Sciences and Engineering
Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Mark R. Antonio
- Chemical
Sciences and Engineering
Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
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40
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Wu X, Huang T, Wu Q, Xu L. Synthesis and conductive performance of indium-substituted ternary heteropoly acids with Keggin structures. Dalton Trans 2016; 45:271-5. [DOI: 10.1039/c5dt02541a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Keggin-type ternary polyoxometalates H4[In(H2O)PW11O39]·11H2O and H5[In(H2O)SiW11O39]·8H2O are solid high-proton conductors with a conductivity of 2.60 × 10−4 S cm−1 and 5.25 × 10−4 S cm−1, respectively, at 18 °C and 80% relative humidity.
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Affiliation(s)
- Xuefei Wu
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- PR China
| | - Tianpei Huang
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- PR China
| | - Qingyin Wu
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- PR China
| | - Lin Xu
- Key Laboratory of Polyoxometalate Science of Ministry of Education
- College of Chemistry
- Northeast Normal University
- Changchun
- PR China
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41
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Isegawa K, Nagami T, Jomori S, Yoshida M, Kondoh H. In situ S-K XANES study of polymer electrolyte fuel cells: changes in the chemical states of sulfonic groups depending on humidity. Phys Chem Chem Phys 2016; 18:25183-25190. [DOI: 10.1039/c6cp04052g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Changes in the chemical states of sulfonic groups of Nafion in polymer electrolyte fuel cells (PEFCs) under gas-flowing conditions were studied using in situ S-K XANES spectroscopy.
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42
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Enhancement of Oxygen Reduction and Mitigation of Ionomer Dry-Out Using Insoluble Heteropoly Acids in Intermediate Temperature Polymer-Electrolyte Membrane Fuel Cells. ENERGIES 2015. [DOI: 10.3390/en8087805] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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43
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Gunaratne KDD, Prabhakaran V, Johnson GE, Laskin J. Gas-Phase Fragmentation Pathways of Mixed Addenda Keggin Anions: PMo12-nW nO 40 3- (n = 0-12). JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2015; 26:1027-1035. [PMID: 25832027 DOI: 10.1007/s13361-015-1090-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 01/28/2015] [Accepted: 01/28/2015] [Indexed: 06/04/2023]
Abstract
We report a collision-induced dissociation (CID) investigation of the mixed addenda polyoxometalate (POM) anions, PMo(12-n)W(n)O(40)(3-) (n = 0-12). The anions were generated in solution using a straightforward single-step synthesis approach and introduced into the gas phase by electrospray ionization (ESI). Distinct differences in fragmentation patterns were observed for the range of mixed addenda POMs examined in this study. CID of molybdenum-rich anions, PMo(12-n)W(n)O(40)(3-) (n = 0-2), generates an abundant doubly charged fragment containing seven metal atoms (M) and 22 oxygen atoms (M(7)O(22)(2-)) and its complementary singly charged PM(5)O(18)(-) ion. In comparison, the doubly charged Lindqvist anion, (M(6)O(19)(2-)) and its complementary singly charged PM(6)O(21)(-) ion are the dominant fragments of Keggin POMs containing more than two tungsten atoms, PMo(12-n)W(n)O(40)(3-) (n = 3-12). The observed transition in the dissociation pathways with an increase in the number of W atoms in the POM may be attributed to the higher barrier of tungsten-rich anions towards isomerization. We present evidence that the observed distribution of Mo and W atoms in the major M(6)O(19)(2-) and M(7)O(22)(2-) fragment ions is different from that predicted by a random distribution, indicating substantial segregation of the addenda metal atoms in the POMs. Charge reduction of the triply charged precursor anion resulting in formation of doubly charged anions is also observed. This is a dominant pathway for mixed POMs having a majority (8-11) of W atoms and a minor channel for other precursors indicating a close competition between fragmentation and charge loss pathways in CID of POM anions.
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Affiliation(s)
- K Don D Gunaratne
- Physical Sciences Division, Pacific Northwest National Laboratory, MSIN K8-88, P.O. Box 999, Richland, WA, 99352, USA
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44
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Understanding the Regioselective Hydrolysis of Human Serum Albumin by Zr(IV)-Substituted Polyoxotungstates Using Tryptophan Fluorescence Spectroscopy. INORGANICS 2015. [DOI: 10.3390/inorganics3020230] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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45
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Heterogeneous Catalysis of Polyoxometalate Based Organic-Inorganic Hybrids. MATERIALS 2015; 8:1545-1567. [PMID: 28788017 PMCID: PMC5507057 DOI: 10.3390/ma8041545] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Revised: 03/08/2015] [Accepted: 03/25/2015] [Indexed: 11/18/2022]
Abstract
Organic–inorganic hybrid polyoxometalate (POM) compounds are a subset of materials with unique structures and physical/chemical properties. The combination of metal-organic coordination complexes with classical POMs not only provides a powerful way to gain multifarious new compounds but also affords a new method to modify and functionalize POMs. In parallel with the many reports on the synthesis and structure of new hybrid POM compounds, the application of these compounds for heterogeneous catalysis has also attracted considerable attention. The hybrid POM compounds show noteworthy catalytic performance in acid, oxidation, and even in asymmetric catalytic reactions. This review summarizes the design and synthesis of organic–inorganic hybrid POM compounds and particularly highlights their recent progress in heterogeneous catalysis.
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46
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Ma A, Zhang X, Wang X, Le L, Lin S. Green synthesis of PdCu supported on graphene/polyoxometalate LBL films for high-performance formic acid oxidation. RSC Adv 2015. [DOI: 10.1039/c5ra09492e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
PdCu alloy nanaoparticles (with sizes of ca. 4.5 nm) have been synthesized by a one-step electrochemical process on composite films constructed from functionalized graphene (GN) and H3PMo12O40 (PMo12) by LBL assembly.
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Affiliation(s)
- Ai Ma
- College of Chemistry & Chemical Engineering
- Fujian Normal University
- Fuzhou 350007
- China
| | - Xiaofeng Zhang
- College of Chemistry & Chemical Engineering
- Fujian Normal University
- Fuzhou 350007
- China
| | - Xiaoying Wang
- College of Chemistry & Chemical Engineering
- Fujian Normal University
- Fuzhou 350007
- China
| | - Lijuan Le
- College of Chemistry & Chemical Engineering
- Fujian Normal University
- Fuzhou 350007
- China
| | - Shen Lin
- College of Chemistry & Chemical Engineering
- Fujian Normal University
- Fuzhou 350007
- China
- Fujian Key Laboratory of Polymer Materials
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47
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Wang Y, Sun MH, Li FY, Sun ZX, Xu L. Assembly of cyanometalate-functionalized phosphotungstates with magnetic properties and bifunctional electrocatalytic activities. Dalton Trans 2015; 44:4504-11. [DOI: 10.1039/c4dt03447c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two cyanometalate-functionalized Dawson type phosphotungstates with a “Netherlands windmills” shape have been prepared under conventional reaction conditions. Their magnetic properties and electrocatalytic activity were investigated.
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Affiliation(s)
- Ya Wang
- Key Laboratory of Polyoxometalates Science of Ministry of Education
- College of Chemistry
- Northeast Normal University
- Changchun 130024
- PR China
| | - Ming-Hui Sun
- Key Laboratory of Polyoxometalates Science of Ministry of Education
- College of Chemistry
- Northeast Normal University
- Changchun 130024
- PR China
| | - Feng-Yan Li
- Key Laboratory of Polyoxometalates Science of Ministry of Education
- College of Chemistry
- Northeast Normal University
- Changchun 130024
- PR China
| | - Zhi-Xia Sun
- Key Laboratory of Polyoxometalates Science of Ministry of Education
- College of Chemistry
- Northeast Normal University
- Changchun 130024
- PR China
| | - Lin Xu
- Key Laboratory of Polyoxometalates Science of Ministry of Education
- College of Chemistry
- Northeast Normal University
- Changchun 130024
- PR China
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48
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Bera MK, Ellis RJ, Burton-Pye BP, Antonio MR. Structural aspects of heteropolyacid microemulsions. Phys Chem Chem Phys 2014; 16:22566-74. [DOI: 10.1039/c4cp03014a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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