Article
Chemistry, Physical
Ye Peng, Ja-Yeon Choi, Liliang Tian, Kyoung Bai, Yi Zhang, Dongchu Chen, Jianhuang Zeng, Dustin Banham
Summary: The distribution of platinum group metal (PGM) nanoparticle catalysts in the carbon support significantly affects the catalyst's performance. The placement of Pt either on the outer surface or within the pores of the carbon results in different activity and performance at high current densities. To gain further insight into the catalyst's properties, a relationship between Pt distribution and relative humidity (RH) tolerance is explored. This work provides valuable information for MEA designers in selecting catalysts for specific applications.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Fengman Sun, Haijun Liu, Ming Chen, Haijiang Wang
Summary: By chemically modifying Pt/C catalyst, we designed a high-oxygen mass-transfer Pt/ionomer interface. The modified membrane electrode assembly (MEA) showed higher voltage at high humidity and reduced oxygen transport resistance. Decreasing the Rionomer of Pt/ionomer interface is the key to improving oxygen transport.
JOURNAL OF POWER SOURCES
(2023)
Article
Polymer Science
Tushar Kanti Maiti, Jitendra Singh, Subrata Kumar Maiti, Jagannath Majhi, Arihant Ahuja, Manjinder Singh, Anasuya Bandyopadhyay, Gaurav Manik, Sujay Chattopadhyay
Summary: In this study, the introduction of sulfonic acid functionalized graphene oxide (SGO) into Perfluorosulfonic acid (PFSA) membranes improved the glass transition temperature (Tg), mechanical properties, proton conductivity, and single-cell performance. The loading of SGO increased the Tg and modulus of PFSA composite membranes, leading to enhanced proton conductivity and fuel cell performance.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Physical
Shuai Shi, Xianglong Wen, Qinqin Sang, Shuai Yin, Kaili Wang, Jian Zhang, Min Hu, Huiming Yin, Jia He, Yi Ding
Summary: Designing catalyst layers with high proton conductivity in membrane electrode assemblies is crucial for proton exchange membrane fuel cells. The use of an ultrathin Pt-decorated nanoporous gold catalyst layer has been shown to significantly improve proton conduction and achieve excellent power density in carbon-free electrodes.
Article
Chemistry, Physical
Tatyana Reshetenko, Madeleine Odgaard, Guenter Randolf, Kenta K. Ohtaki, John P. Bradley, Barr Zulevi, Xiang Lyu, David A. Cullen, Charl J. Jafta, Alexey Serov, Andrei Kulikovsky
Summary: In this study, a cathodic catalysts layer (CCL) design was achieved using a catalyst coated membrane approach with Platinum Group Metal-free (PGM-free) electrocatalysts. Three different Fe-Mn-N-C compounds were synthesized and characterized, and their electrochemical properties were evaluated. It was found that the CCLs exhibited high proton conductivity and predominantly exhibited a 4e- oxygen reduction reaction mechanism.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Kyu-Young Park, Matthew E. Sweers, Ulrich Berner, Erhard Hirth, Julia R. Downing, Janan Hui, Jonathan Mailoa, Christina Johnston, Soo Kim, Linsey C. Seitz, Mark C. Hersam
Summary: Carbon-supported Pt nanoparticles for cathode oxygen reduction reaction (ORR) in fuel cells suffer from poor durability. This study introduces a pickering emulsion-processing strategy using graphene nanoplatelet dispersions stabilized by ethyl cellulose to mitigate Pt loss. The resulting graphene-Pt/C catalysts demonstrate superior durability and ECSA retention compared to a commercial Pt/C catalyst. The success is attributed to the localization of Pt nanoparticles on graphene defects, which suppresses dissolution and agglomeration without hindering reactant accessibility.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Polymer Science
Miriam M. Tellez-Cruz, Jorge Escorihuela, Omar Solorza-Feria, Vicente Compan
Summary: The study of electrochemical catalyst conversion of renewable electricity and carbon oxides into chemical fuels is crucial for mitigating the global energy crisis. Research efforts are currently focused on developing high-performance membranes and nanomaterials with high catalytic activity to improve fuel cell performance and reduce the use of expensive platinum group metals.
Article
Chemistry, Physical
Sara Paydar, Kuno Kooser, Priit Moller, Olga Volobujeva, Sari Granroth, Enn Lust, Gunnar Nurk
Summary: Development of active ceramic hydrogen electrodes with high stability is crucial for the advancement of solid oxide fuel cells (SOFC). In this study, a series of cubic perovskite-type La/Ca/Fe-doped strontium titanates (LSCTF) were synthesized and evaluated for their crystallographic and electrical properties, catalytic activity, stability, and performance as fuel electrodes in SOFC. The results showed that LSCTF materials behave like semiconductors, and the conductivity, catalytic activity, and stability of the electrodes are significantly influenced by the Ca concentration in the A-site. The optimal composition of La0.2Sr0.35Ca0.35Ti0.95Fe0.05O3-delta fuel electrode exhibited a low polarization resistance value and the fuel cell with a 50 wt % La0.2Sr0.35Ca0.35Ti0.95Fe0.05O3-delta + 50 wt % Ce0.9Gd0.1O2-delta anode demonstrated high power density.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Fatima C. Teixeira, Ana de Sa, Antonio P. S. Teixeira, V. M. Ortiz-Martinez, A. Ortiz, I Ortiz, C. M. Rangel
Summary: The study focused on the development of new Nafion membranes by incorporating aryl- or azaheteroaromatic bisphosphonate compounds as dopants, resulting in enhanced proton conductivity properties compared to commercial Nafion membranes. These doped membranes showed improved performance in fuel cells at different temperatures, with a maximum power output of around 383 mW cm(-2) at 70 degrees C. The membranes also demonstrated potential advantages in restricting gas crossover, as indicated by higher open circuit potentials compared to Nafion membranes under the same conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
R. Angayarkanni, Aristatil Ganesan, M. Dhelipan, S. Karthikeyan, N. Mani, P. Thiyagarajan
Summary: The fuel cell operated successfully without external humidification support by utilizing a novel silica composite layer, showing improved performance compared to a commercial catalyst MEA. The silica layer provided a well-humidified environment for proton transfer, demonstrating excellent electrochemical stability and durability in both dry and humidified gas conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Mongkol Tipplook, Gasidit Panomsuwan, Yukihiro Muta, Nagahiro Saito
Summary: A study demonstrated a one-step synthesis of amphiphilic functional group-modified carbon-supported platinum catalyst via liquid-phase plasma process, improving the efficiency and durability of PEMFCs. The research findings suggest that the number of hydrophilic and hydrophobic characters on the carbon surface plays a crucial role in the performance of PEMFCs.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Engineering, Environmental
Chao Hao, Qinghao Meng, Bowen Yan, Jia Liu, Bin Yang, Ligang Feng, Pei Kang Shen, Zhi Qun Tian
Summary: Developing a catalyst layer with high stability and efficient mass transport is crucial for fabricating proton exchange membrane fuel cells (PEMFCs) with ultra-low Pt loading. In this study, a newly designed catalyst layer using a three-dimensional graphene network (3D-GN) was developed. The 3D-GN provides a stable framework for supporting Pt nanoparticles and efficient mass transport pathways. The Pt/3D-GN electrode exhibits higher cell performance and excellent stability compared to conventional carbon nanosphere-based electrodes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Fandi Ning, Jiaqi Qin, Xiong Dan, Saifei Pan, Chuang Bai, Min Shen, Yali Li, Xuwei Fu, Shi Zhou, Yangbin Shen, Wei Feng, Yecheng Zou, Yi Cui, Yujiang Song, Xiaochun Zhou
Summary: The use of ordered catalyst layers, such as the ordered Nafion array, has shown great potential in reducing catalyst loading and improving fuel cell performance. By optimizing the Nafion solvent, thermal annealing temperature, and stripping mode, a 40 nm diameter ordered Nafion array (D40) was successfully prepared, providing abundant proton transfer channels and a large area for catalyst loading. The fuel cells with D40 demonstrated significantly higher peak power densities and reduced catalyst loading compared to those without the array.
Article
Chemistry, Physical
Haoyu Wu, Tianchi Zhou, Bin Wang, Jinli Qiao
Summary: In this work, a novel viscose-based proton exchange membrane (PEM) was fabricated through cationic modification and dyeing treatment. The as-prepared membrane exhibited high proton conductivity and water uptake, making it suitable for applications in fuel cells and other energy-related fields.
JOURNAL OF MATERIOMICS
(2023)
Article
Electrochemistry
Tomohiro Ishiyama, Takuya Yamaguchi, Junji Nishii, Toshiharu Yamashita, Hiroshi Kawazoe, Takahisa Omata
Summary: This study investigates the temperature dependence of proton conductivity in glasses prepared through the alkali-proton substitution method. The activation energy of proton conduction was found to exhibit non-Arrhenius type temperature dependence. The effects of thermal expansion of the glass structure on proton conductivity were elucidated using various techniques like Raman spectroscopy, NMR, infrared spectroscopy, and molecular modeling.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
Trinh Tuan Anh, Vu Manh Thuan, Doan Ha Thang, Bui Thi Hang
JOURNAL OF ELECTRONIC MATERIALS
(2017)
Article
Engineering, Electrical & Electronic
Nguyen Viet Long, Yong Yang, Cao Minh Thi, Le Hong Phuc, Le Trong Lu, Masayuki Nogami
JOURNAL OF ELECTRONIC MATERIALS
(2017)
Article
Engineering, Electrical & Electronic
Nguyen Viet Long, Yong Yang, Cao Minh Thi, Le Hong Phuc, Masayuki Nogami
JOURNAL OF ELECTRONIC MATERIALS
(2017)
Article
Optics
Ho Van Tuyen, Takamasa Nonaka, Ken-ichi Yamanaka, Pham Minh Chau, Nguyen Thi Quy Hai, Vu Xuan Quang, Masayuki Nogami
JOURNAL OF LUMINESCENCE
(2017)
Article
Chemistry, Multidisciplinary
Masayuki Nogami, Vu Xuan Quang, Takamasa Nonaka, Tadashi Shimizu, Shinobu Ohki, Kenzo Deguchi
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2017)
Article
Materials Science, Ceramics
Masayuki Nogami, Nguyen Thi Thai An, Vu Xuan Quang, Yuichi Kato, Yoriko Matsuoka
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2018)
Article
Chemistry, Physical
Masayuki Nogami, Vu Xuan Quang, Shinobu Ohki, Kenzo Deguchi, Tadashi Shimizu
JOURNAL OF PHYSICAL CHEMISTRY B
(2018)
Article
Materials Science, Multidisciplinary
Nguyen Viet Long, Yong Yang, Cao Minh Thi, Le Hong Phuc, Vu Phi Tuyen, Masayuki Nogami
Review
Materials Science, Ceramics
Masayuki Nogami, Xuan Hung Le, Xuan Quang Vu
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2019)
Article
Optics
Vu Phi Tuyen, Vu Xuan Quang, Phan Van Do, Luong Duy Thanh, Nguyen Xuan Ca, Vu Xuan Hoa, Le Van Tuat, Le Anh Thi, Masayuki Nogami
JOURNAL OF LUMINESCENCE
(2019)
Article
Engineering, Electrical & Electronic
Pham Thi Minh Chau, Nguyen Thi Quy Hai, Vu Xuan Quang, Ho Van Tuyen, Masayuki Nogami
JOURNAL OF ELECTRONIC MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Masayuki Nogami, Le Xuan Hung, Ho Van Tuyen, Vu Xuan Quang
JOURNAL OF MATERIALS SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
Ho Van Tuyen, Masayuki Nogami, Le Xuan Hung
Article
Crystallography
Nguyen Thi Nhat Hang, Yong Yang, Nguyen Quang Thanh Nam, Masayuki Nogami, Le Hong Phuc, Nguyen Huu Tri, Ho Van Cuu, Nguyen Viet Long
Summary: We successfully prepared gold nanoparticles with different shapes and crystal structures using modified polyol methods and design of experiments. The research indicates that the modified polyol methods are of great importance for the practical applications of gold nanoparticles. Additionally, we experimentally discussed the critical nucleation, growth, and formation processes of gold nanoparticles in modified polyol methods and design of experiments.
Article
Materials Science, Ceramics
Masayuki Nogami, Vu Xuan Quang, Ho van Tuyen, Le Xuan Hung
Summary: Rare-earth doped glasses have shown potential applications in light-emitting devices. However, developing silicate glasses with excellent photoluminescence performance remains difficult. In this study, we investigated the reduction of rare-earth ions in doped glasses through heating in a hydrogen gas atmosphere or X-ray irradiation. We successfully synthesized Al2O3-SiO2 glasses doped with Sm3+ and Eu3+ ions, which exhibited strong photoluminescence. The Sm3+ and Eu3+ ions were reduced to their divalent states when heated in hydrogen gas, while only Sm3+ ions were reduced to Sm2+ ions when irradiated with X-rays. It was also found that the reduced Sm2+ ions in the glass could easily be oxidized to Sm3+ ions by heating in air. The fast redox reaction between Sm3+ and Sm2+ ions makes the Sm3+-doped Al2O3-SiO2 glasses suitable for X-ray therapy and sensor applications.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Chemical
Jiawei Hou, Shixuan Guo, Nigel Graham, Wenzheng Yu, Kening Sun, Ting Liu
Summary: A novel 2D composite membrane based on r-HGO and MXene materials was developed, demonstrating exceptional performance for water treatment in terms of permeability, pollutant rejection, and physical stability. The optimization of preparation conditions and material proportions can result in high water flux and efficient removal of pollutants.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Retraction
Engineering, Chemical
Chang Liu, Jinghong Liu, Liang Zhu, Shanfu Tang, Huixin Xiong
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Rui Gao, Caihong Liu, Andreia F. Faria, Qiang He, Chun Yang, Jun Ma
Summary: A novel copolymer architecture has been developed to address biofouling concerns in thin-film composite (TFC) membranes by integrating anti-fouling, bactericidal, and fouling-release functions. The multifunctional membrane demonstrates promising anti-adhesive properties, self-cleaning ability, and high flux recovery rate.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alexander T. Bridge, Noah P. Wamble, Matthew S. Santoso, Joan F. Brennecke, Benny D. Freeman
Summary: This study demonstrates the reproducible preparation of high-flux defect-free asymmetric gas separation membranes using Cyrene(TM) as a majority dope formulation component. By adjusting the volume ratios of Cyrene(TM) and THF, as well as the concentrations of Matrimid(R) and the dry step time, optimal membrane performance is achieved.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alessandra Imbrogno, Han Ya Lin, Babak Minofar, Andrea Iris Schaefer
Summary: In this study, a composite nanofiber membrane containing cross-linked beta-cyclodextrin-epichlorohydrin was prepared and evaluated for the removal of steroid hormones. The results showed that the membrane had high adsorption capacity and the ability to form a specific inclusion complex interaction with the hormones, indicating its potential application in hormone removal.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Bora Shin, Jaewon Shin, Yanuar Chandra Wirasembada, Ki Young Park, Jinwoo Cho
Summary: This study develops a mathematical model to estimate the initial flux of volatile fatty acids in the direct contact membrane distillation process. It identifies the parameters affecting the flux and their relationship with pH.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi-Jui Yeh, Jr Rong Liou, Wei Lin, Kuo-Lun Tung, Wei-Hung Chiang
Summary: This study demonstrates an effective plasma engineering method to create nitrogen-doped graphene quantum dot (NGQD)-inorganic nanocomposites for tunable molecular separation. The composite materials show high separation efficiency and controllable nanopore structures, making them potentially valuable for various applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Horacio Lopez-Marques, Kristofer L. Gleason, Manuel Aguilar-Vega, Rita Sulub-Sulub, J. Ehren Eichler, Hyeonji Oh, C. Buddie Mullins, Benny D. Freeman, Manish Kumar
Summary: In this study, water transport properties in Carbon Molecular Sieve (CMS) membranes were investigated. It was found that membranes synthesized at different pyrolysis temperatures exhibited varying water permeabilities. Compared to other polymeric materials, CMS membranes showed high water permeability, indicating potential for dehydration applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Dmitry A. Alentiev, Roman Yu. Nikiforov, Marina A. Rudakova, Danil P. Zarezin, Maxim A. Topchiy, Andrey F. Asachenko, Nikolay A. Belov, Maxim Bermeshev
Summary: A series of new norbornene-type monomers containing linear and branched substituents were synthesized, and robust thin membranes were prepared by vinyl-addition polymerization. Gas separation performance for the synthesized polymers was evaluated, and the structure of substituent side chains was found to significantly affect gas permeability and CO2 facilitated transport.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lei Yan, Qi Zhang, Ze Zhang, Gui-Jie Li, Yi Jin, Xin-Lin Zhang, Yan-Yun Sun
Summary: In this study, a continuous, stable and fast ion transport channel was established through in-situ guided cross-linking of zinc alginate hydrogels on a porous membrane, overcoming the negative pore effect and effectively inhibiting the dendrite growth of zinc anodes and interfacial side reactions.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yuqing Zhang, Ailing Zhang, Huiyang He, Yuting Fan, Yongjiang Li, Song Wang, Sanxi Li
Summary: The Langmuir-Blodgett self-assembly process is used to create an ordered SPEEK membrane, which enhances the proton conductivity by three times compared to conventional solution casting method.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Hasan Ismaeel, David Gibson, Eleonora Ricci, Maria Grazia De Angelis
Summary: In this study, a machine learning-based group contribution method (ML-GC) was developed to predict pure polymer parameters and successfully applied to predict gas solubility and gas solubility isotherms in glassy polymeric membranes. The model showed satisfactory performance on a small dataset, but has the potential to provide more accurate predictions for a wider range of polymers as more data becomes available.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi Ji, Yu Sun, Huilin Li, Qiang Fu, Yan Zhang
Summary: Previous studies have shown that vibration- or rotation-based techniques can effectively mitigate fouling during membrane filtration. However, it is difficult to incorporate these techniques with spiral wound modules (SWMs) widely used in water and wastewater treatment. This study developed a prototype membrane system to accommodate angular vibrations with a modified SWM, and experimental results showed that applying angular vibrations can effectively control algal fouling in an SWM with lower energy consumption compared to traditional methods.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lakshmeesha Upadhayaya, Abaynesh Yihdego Gebreyohannes, Muhammad Wakil Shahzad, Usman T. Syed, Sandra L. Aristizabal, Radoslaw Gorecki, Suzana P. Nunes
Summary: Increasing temperatures worldwide pose a significant health risk, exacerbated by high humidity. Conventional air conditioners contribute heavily to carbon dioxide emissions, with dehumidification being a major factor. Membrane-based dehumidification system offers energy efficiency and non-toxic water vapor removal. This study demonstrates a membrane dehumidification system with polymeric hollow fibers coated with a green polyphenol coating, showing remarkable water vapor transport rate and selectivity. Long-term testing reveals minimal decline in vapor transport and a 4-5 times higher coefficient of performance (COP) compared to conventional dehumidifiers, making it a highly competitive, energy-saving device with reduced emissions and a smaller footprint.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Zhengzhong Zhou, Xue Zhu, Yi Yuan, Shaoqiang Wang, Xiaoshan Meng, Taoli Huhe, Qian Wang
Summary: In this study, lignin, a biomass material, was chemically modified and utilized in the interfacial polymerization process to improve the performance of nanofiltration membranes. The modified membranes showed enhanced hydrophilicity and anti-fouling properties, and the optimization of membrane pore size increased permeability. The study also demonstrated the potential application of the membranes in biogas slurry valorization.
JOURNAL OF MEMBRANE SCIENCE
(2024)
