Article
Polymer Science
Kosar Arab, Mahdi Tohidian, Amirsaeed Shamsabadi
Summary: In this study, nanocomposite polyelectrolyte membranes based on sulfonated polystyrene (SPS) and imidazole-2-acetic acid (Im) blend (SPSIm), incorporated with halloysite nanotubes (HNTs), were investigated for direct methanol fuel cell (DMFC) applications. The optimal degree of sulfonation for PS was selected based on hydrolytic stability, and SPS was blended with Im to improve proton conductivity and decrease methanol permeability. The addition of HNTs further reduced methanol crossover by introducing tortuous diffusion pathways. The resulting SPSIm/HNT membrane showed significantly decreased methanol permeability and improved membrane selectivity parameter, making it a potential candidate for DMFC applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Nilanjan Mukherjee, Anupam Das, Tushar Jana
Summary: In this study, a simple and efficient method was developed to functionalize the surface of multiwalled carbon nanotubes (MWCNT) with precise functional polymer chains, which were covalently grafted on the surface of the MWCNT. These polymer-grafted MWCNTs were then used as nanofillers in developing proton conducting membranes with enhanced properties. The novelty of this work lies in successfully grafting a same N-heterocyclic block copolymer structure covalently on the surface of the MWCNT.
ACS APPLIED NANO MATERIALS
(2023)
Article
Multidisciplinary Sciences
Atia Mahmoud, Alaa Fahmy, Abdelrahman Naser, Mohamed Abu Saied
Summary: Novel polyelectrolytic hybrid membranes with improved chemical and mechanical stability were prepared by blending different materials, and showed potential feasibility for polyelectrolyte membrane applications.
SCIENTIFIC REPORTS
(2022)
Review
Biochemistry & Molecular Biology
Galina F. Prozorova, Alexander S. Pozdnyakov
Summary: In this article, a comparative analysis was conducted on the physicochemical, dielectric, and proton-conducting properties of composite polymer materials based on 1H-1,2,4-triazole. The results showed that 1H-1,2,4-triazole and its homopolymers and copolymers have promising potential for the development of proton-conducting fuel cell membranes. These materials improve the characteristics of electrolyte membranes, enhance their film-forming ability, increase thermal and electrochemical stability, and provide high ionic conductivity under anhydrous conditions at high temperatures.
Article
Polymer Science
Si Shen, Tingting Jia, Jing Jia, Ning Wang, Di Song, Jing Zhao, Jin Jin, Quantong Che
Summary: The proton exchange membranes (PEMs) constructed through alternate depositing chitosan and graphene oxide show improved proton conductivity and mechanical properties in high temperature proton exchange membrane fuel cells (HTPEMFCs). Doped phosphoric acid molecules enhance membrane's mechanical strength, while layer-by-layer deposited composite membranes exhibit excellent proton conductivity and stability. The strategy of alternate depositing functional components on membrane substrates proves to be more effective at enhancing the quality of PEMs.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Chemistry, Physical
Tushar Roy, Sunil Kumar Wanchoo, Kaushik Pal
Summary: The introduction of SiO2@CNT and ZrO2@CNT as nanofillers dramatically enhances the proton conductivity and thermal stability of the proton exchange membrane at high temperatures. Proton migration is mainly achieved through vehicle mechanism at low temperatures and Grotthuss mechanism at high temperatures, while the combined proton transfer effect significantly improves conductivity in the composite membrane.
Article
Crystallography
Ahmed Al Otaibi, Mallikarjunagouda B. B. Patil, Shwetarani B. B. Rajamani, Shridhar N. N. Mathad, Arun Y. Y. Patil, M. K. Amshumali, Jilani Purusottapatnam Shaik, Abdullah M. M. Asiri, Anish Khan
Summary: The sol-gel technique was used to synthesize ZnO nanoparticles, which were embedded into a PVA matrix to form nanocomposite polymeric membranes. Increasing the concentration of ZnO in the membrane improved the ionic exchange capacity and proton conductivity efficiency of the nano-composite membranes.
Article
Multidisciplinary Sciences
Zhi Long, Kenji Miyatake
Summary: A new SPP-based ionomer, SPP-TP-f, was developed with high ion exchange capacity and superior proton conductive performance, surpassing Nafion even under low humidity conditions. Additionally, the solvent solubility of SPP-TP-f 5.1 allowed for the preparation of a composite membrane SPP-TP-f 5.1/DPTFE, showing excellent fuel cell performance.
Article
Engineering, Chemical
Liming Zhang, Shiqing Hu, Zhongwei Cao, Bingjie Pang, Jingyi Wang, Peng Zhang, Xuefeng Zhu, Weishen Yang
Summary: Vacuum-assistant dip-coating method is developed to prepare defect-free BaCe0.4Zr0.4Y0.1O3-delta (BCZYYb4411) proton-conducting electrolyte membranes on porous anode substrates. By tuning the mass concentration of electrolyte powders in the coating slurry, thin and dense electrolyte membranes with different thicknesses can be reproducibly prepared. The as-prepared proton-conducting fuel cells with defect-free electrolyte membranes exhibit high peak power density and stability.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Farid Wijaya, Seunghee Woo, Hyejin Lee, Adam F. Nugraha, Dongwon Shin, Byungchan Bae
Summary: In this study, sulfonated multiblock poly(phenylene-co-arylene ether sulfone) (SmPPES) membranes were prepared via Colon's Nickel catalyzed cross-coupling reaction. The membranes showed well-defined phase separation and proton conductivities comparable to or exceeding that of a reference Nafion membrane. The control over sulfonated phenylene and ether sulfone hydrophobic blocks provides new insight into designing high-performance polymer electrolyte membranes.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Jingjing Lin, Sabine Willbold, Tatiana Zinkevich, Sylvio Indris, Carsten Korte
Summary: Protic ionic liquids (PILs) are considered as new candidates for non-aqueous electrolytes in fuel cells operating at temperatures above 80 degrees C, with the study revealing that their cooperative transport mechanism in polybenzimidazole blend membranes primarily contributes to conductivity.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Materials Science, Multidisciplinary
Pankaj Kumar, Paramita Das
Summary: This study focuses on the preparation of composite proton exchange membranes based on sulfonated poly(vinyl alcohol) and exfoliated molybdenum disulfide. The membranes exhibit excellent selectivity and proton conductivity, making them suitable for direct methanol fuel cell applications.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Engineering, Chemical
Yiqin Liu, Xunli Mao, Hong Wu, Xiaoyao Wang, Benbing Shi, Chunyang Fan, Yan Kong, Zhongyi Jiang
Summary: By incorporating sulfonated lignin as an intercalator, highly conductive graphene oxide/sulfonated lignin membranes were prepared. These membranes exhibited high proton conductivity and maximum power density, attributed to the abundant sulfonic acid groups and ether bonds providing additional proton transfer sites, as well as the continuous proton transfer network.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Na Rae Kang, Thanh Huong Pham, Hannes Nederstedt, Patric Jannasch
Summary: Phosphonated aromatic polymers functionalized with highly acidic perfluorophenylphosphonic acid show high conductivity, efficient ionic clustering, excellent proton conductivity, and outstanding thermal stability, making them attractive for applications in catalyst layers and proton exchange membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
In -Ho Kim, Dae-Kwang Lim, Yeon Namgung, Hohan Bae, Jun-Young Park, Sun-Ju Song
Summary: In this study, the electrochemical and transport properties of a perovskite-type proton conductor BZCYYb5311 were evaluated. The material showed high proton conductivity and exceptional chemical stability. It exhibited a proton conductivity of 98% compared to ionic conductivity at 600°C. The maximum power density in fuel cell mode and current density in electrolysis mode were calculated, indicating the potential of BZCYYb5311 as a fuel cell material.
Article
Chemistry, Physical
Umar S. Yushau, Lama Almofeez, Ayhan Bozkurt
Article
Materials Science, Ceramics
Yusuf O. Ibrahim, M. A. Gondal, A. Alaswad, R. A. Moqbel, M. Hassan, E. Cevik, T. F. Qahtan, M. A. Dastageer, A. Bozkurt
CERAMICS INTERNATIONAL
(2020)
Article
Chemistry, Physical
E. Cevik, A. Bozkurt, M. Dirican, X. Zhang
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Energy & Fuels
Emre Cevik, Seyda Tugba Gunday, Ismail Anil, Omar Alagha, Ayhan Bozkurt
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2020)
Article
Energy & Fuels
Emre Cevik, Ayhan Bozkurt
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2020)
Article
Chemistry, Physical
Seyda Tugba Gunday, Emre Cevik, Ismail Anil, Omar Alagha, Ayhan Bozkurt
JOURNAL OF MOLECULAR LIQUIDS
(2020)
Article
Chemistry, Multidisciplinary
Seyda Tugba Gunday, Emre Cevik, Abdulmalik Yusuf, Ayhan Bozkurt
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2020)
Article
Chemistry, Multidisciplinary
Ismail Anil, Seyda Tugba Gunday, Ayhan Bozkurt, Omar Alagha
Article
Materials Science, Ceramics
Talal F. Qahtan, Emre Cevik, Mohammed A. Gondal, Ayhan Bozkurt, Sultan Akhtar, Muhammad Hassan
Summary: A novel and green technique involving laser-induced photocatalytic reduction was developed to synthesize binder-free composite materials based on reduced graphene oxide (rGO) for flexible supercapacitors. The resulting supercapacitors demonstrated significant improvement in electrochemical performance due to the intrinsic characteristics of rGO such as high surface area, excellent electrical conductivity, and mechanical flexibility. The method is scalable, cost-effective, and can be used to produce all binder-free AC/rGO based composites for flexible energy-storage devices.
CERAMICS INTERNATIONAL
(2021)
Article
Polymer Science
Mehtap Safak Boroglu, Ismail Boz, Busra Kaya
Summary: The study focused on synthesizing ZIF-12 crystals and preparing mixed matrix membranes with varying ZIF-12 loadings, characterized by various methods. The performance of the membranes in binary gas separation was evaluated, with PEI/ZIF-12-30 wt% MMM showing high permeability and ideal selectivity values for H-2/CH4 and CO2/CH4.
JOURNAL OF POLYMER ENGINEERING
(2021)
Article
Chemistry, Applied
Emre Cevik, Ayhan Bozkurt
Summary: A novel polymer metal chelate electrolyte was prepared by incorporating cobalt sulfate into poly(acrylic acid) to fabricate quasi-solid state supercapacitor devices, showing excellent electrochemical properties and high specific capacitance.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Energy & Fuels
Ilke Ilicak, Mehtap Safak Boroglu, Ali Durmus, Ismail Boz
Summary: Polyimide membranes, especially those with zeolitic imidazolate frameworks (ZIFs), show superior properties in gas separation processes. By incorporating ZIF-95 particles into polyimide matrix, mixed matrix membranes (MMMs) with enhanced gas selectivity were successfully prepared. The study also demonstrated the significant increase in permeability and selectivity of CO2, CH4, and H-2 gases with the addition of ZIF-95 in the polymer matrix.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2021)
Article
Chemistry, Physical
Abdulrahman A. Al-Rabiah, Ismail Boz, Vagif M. Akhmedov, Mohamed Mokhtar M. Mostafa, Abdulaziz A. Bagabas
Summary: This study reports a single-step gas-phase green synthesis of isopropyl alcohol (IPA) via acetone hydrogenation under ambient pressure. Composite catalysts consisting of ruthenium nanoparticles supported on activated charcoal and nano-zinc oxide were used, resulting in high yields and selectivity of IPA. The immobilized Ru catalysts showed excellent catalytic performance under mild green synthesis conditions.
Article
Engineering, Chemical
Yasar Zengin, Busra Kaya, Mehtap Safak Boroglu, Ismail Boz
Summary: In this study, WO3-cSiO2 catalysts were synthesized using a novel microwave-assisted synthesis method and tested for the gas-phase glycerol dehydration reaction. The catalyst prepared by the microwave method exhibited the best catalytic performance with a 52.4% acrolein yield. The yield results were found to be influenced by the acidity of the catalyst.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Applied
Busra Kaya, Yasar Zengin, Mehtap Safak Boroglu, Ismail Boz
Summary: By characterizing the tungsten oxide catalyst, it was found that the medium-strength surface acidity and mesoporous structure play a crucial role in the selective dehydration of glycerol to acrolein.
JOURNAL OF POROUS MATERIALS
(2023)