Article
Engineering, Chemical
Lei Xing, Gaojian Chen, Jin Xuan, Liang He, Qian Xu, Sheng Zhang, Huaneng Su, Weidong Shi
Summary: The non-uniform distribution of platinum in the cathode catalyst layers of proton exchange membrane fuel cells was found to affect the cell performance.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Physical
Dan Wu, Samindi Madhubha Jayawickrama, Tsuyohiko Fujigaya
Summary: This study investigates the effect of polymer-coating on the durability of Pt nanoparticles in polymer electrolyte membrane fuel cells (PEMFC). The results show that using a polymer-coated catalyst leads to a smaller decrease in maximum power density after accelerated durability tests, indicating the potential of the polymer-coating method to improve PEMFC durability.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Analytical
Hossieny Ibrahim, Yassien Temerk
Summary: A novel electrochemical sensor based on nanosized gold particles was constructed for the detection of Spironolactone (SPL), showing good catalytic activity and high sensitivity. The sensor was proven to be reliable for the detection of SPL in tablets, human fluids, and patient plasma, and compared favorably with UHPLC analysis.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Physical
Nataliya A. Ivanova, Dmitry D. Spasov, Adelina A. Zasypkina, Olga K. Alekseeva, Elena Kukueva, Ekaterina A. Vorobyeva, Ekaterina S. Kudinova, Ratibor G. Chumakov, Pierre Millet, Sergey A. Grigoriev
Summary: This study compared the performance level of H-2/O-2 PEM fuel cells using three different deposition techniques for catalytic layers, and analyzed their microstructure and chemical composition using various analytical methods. The electrochemical surface areas of the catalytic layers were determined by cyclic voltammetry, and their performance was compared based on i-V curves.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Sung Yul Lim, Santiago Martin, Guohua Gao, Yibo Dou, Soren Bredmose Simonsen, Jens Oluf Jensen, Qingfeng Li, Kion Norrman, Shao Jing, Wenjing Zhang
Summary: The expedited conversion of O-2 to H2O with minimal amounts of Pt is crucial for the wide applicability of PEM fuel cells. Developing a process for catalyst management is essential to avoid unnecessary catalyst loss while enhancing Pt utilization, catalytic activity, and durability. The fabrication of self-standing nanofiber electrodes using electrospinning simplifies the operation of cell devices and reduces Pt loss, showing excellent performance due to the synergistic interaction between Pt-Co and Co-N-x nanoparticles.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Energy & Fuels
Sara Barati, Mohsen Mehdipourghazi, Mahdi Abdollahi, Khadijeh Hooshyari, Behnam Khoshandam
Summary: By incorporating TiO2 nanoparticles, the high-temperature porous nanocomposite membranes showed increased acid storage ability, leading to enhanced proton conductivity and high performance in fuel cell applications.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Yongping Luo, Wei Zhong, Ping Huang, Hui Ou, Haiyan Fu, Chen Liu, Zonghu Xiao, Shunjian Xu
Summary: Utilizing core-shell CMs@NiO as the support material, the enhancement of electrocatalytic oxidation of methanol by Pt catalyst was achieved, showing improved activity and stability, which has potential applications.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Leandro Gonzalez Rodriguez, Roberto Campana Prada, Margarita Sanchez-Molina, Tonatiuh Alejandro Rodriguez Victoria
Summary: The electrochemical performance of MEAs with ultra-low platinum load and different compositions of Nafion/C was investigated. Results showed that using oxygen as an oxidant gas can increase power density, while the electrode with 40 wt% Nafion/C exhibited the most uniform ionomer network surface.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Electrochemistry
Mireya Carvela, Justo Lobato, Manuel Andres Rodrigo
Summary: This study demonstrates the feasibility of MEAs based on Nafion membranes for use in reversible electrochemical cells in the chloralkali process, achieving high current density and power density compared to traditional systems using liquid electrolytes.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Bilquis Ali Al-Qodami, Hafsa H. Alalawy, Islam M. Al-Akraa, Sayed Youssef Sayed, Nageh K. Allam, Ahmad M. Mohammad
Summary: A novel electrochemical engineering method utilizing intersected ferric oxyhydroxide nanotubes for synthesizing spherical Pt nanoparticles showed remarkable catalytic performance in direct formic acid fuel cells, effectively eliminating the issue of permanent CO poisoning and hinting at quick industrialization potential for the technology.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Liu Yang, Zhejie Ma, Quanquan Gan, Qi Zhang, Ping Li, Chenxi Cao
Summary: Replacing conventional catalyst support with meso-porous carbon in PEMFC can improve catalyst usage and cell performance. However, the mechanism for this enhancement is not fully understood, hindering further optimization. This study proposes a unified agglomerate model for catalyst layers with different carbon supports, applicable for normal and cold-start conditions. Parametric study shows that Ketjenblack as a porous carbon support enables easier cold start but slightly decreases nominal cell performance, and fine-tuning its properties is crucial for maximizing catalyst layer effectiveness.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Engineering, Environmental
Lei Xing, Yuanxiang Xu, Zeljko Penga, Qian Xu, Huaneng Su, Frano Barbir, Weidong Shi, Jin Xuan
Summary: The use of a systematic design of gradients in platinum loading and temperature distribution can improve cell performance, save platinum usage, and maintain current density homogeneity in PEM fuel cells.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
M. Ahsanul Haque, A. Bakar Sulong, L. Kee Shyuan, E. Herianto Majlan, T. Husaini, R. Emilia Rosli
Summary: The polymer/MWCNT nanocomposites synthesized in this study exhibited higher specific surface areas compared to the pristine MWCNT. The MEAs fabricated using hot pressing method showed a maximum power density of 112.10 mW/cm(2) in a single cell. The synthesized catalyst-supporting materials enhanced electrochemical activity and stability, achieving the main objective of this study.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Williane da Silva Freitas, Alessandra D'Epifanio, Carmelo Lo Vecchio, Irene Gatto, Vincenzo Baglio, Valerio C. A. Ficca, Ernesto Placidi, Barbara Mecheri
Summary: Fe-N-C catalysts were synthesized using a Zn-based zeolitic imidazolate framework and thermal treatment. The pyrolysis temperature during synthesis affected the formation of Fe-based catalytic sites and the removal of Zn. Increasing the pyrolysis temperature resulted in higher ORR activity and better performance durability. The Fe-N-C-1000 catalyst showed competitive performance in fuel cells compared to Pt/C, even demonstrating higher ORR activity and tolerance to high concentrations of methanol.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Lu Lu, Han Deng, Zhipeng Zhao, Bing Xu, Xin Sun
Summary: In this study, N-doped carbon nanotube supported Pt nanowire catalysts were successfully synthesized and their electrocatalytic activity and durability in proton exchange membrane fuel cells were investigated. The PtNW/NCNTs demonstrated better oxygen reduction reaction activity and stability, showing promise as an alternative to traditional Pt/C catalysts.
JOURNAL OF POWER SOURCES
(2022)
Article
Green & Sustainable Science & Technology
George Theodorakopoulos, Dionysios S. Karousos, Konstantinos G. Mansouris, Andreas A. Sapalidis, Evangelos P. Kouvelos, Evangelos P. Favvas
Summary: Mixed matrix membranes play a crucial role in the preparation of stable, stretchy, durable and efficient membranes for gas separation applications. This article presents the development steps, structural characteristics, and gas selectivity properties of graphene nanoplatelets-based mixed matrix hollow fiber membranes.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Engineering, Environmental
Charalampia Kalogirou, Oliver Hofft, Anna Godde, Nikolaos Papadimitriou, Pavlos K. Pandis, Christos Argirusis, Georgia Sourkouni
Summary: This study aims to investigate the impact of different advanced oxidation processes on the near surface structure of polylactic acid samples and promote the adhesion of enzymes or bacteria for biodegradation. Ultrasonic and UV treatments significantly alter the surface properties of PLA, while plasma treatment exposes oxygen groups on the surface.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Review
Chemistry, Physical
Ashkan Makhsoos, Mohsen Kandidayeni, Bruno G. Pollet, Loic Boulon
Summary: Decarbonized hydrogen production using renewable energy sources and water electrolysis is seen as a promising solution for a sustainable future. This paper reviews the most compelling research on increasing PEMWE efficiency, which is crucial for advancing this technology. Various aspects, including power sources, inputs, stack design, control strategy, and hybrid systems, are analyzed. The paper concludes with five essential recommendations for future studies on PEMWE efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Sepanta Dokhani, Mohsen Assadi, Bruno G. Pollet
Summary: Population growth and industrial expansion have led to increased energy demand and fossil fuel use, resulting in greenhouse gas emissions and air pollution. Countries are seeking alternatives to fossil fuels, and hydrogen is a promising option for electricity generation. This study examines the production of hydrogen from seawater using a proton exchange membrane electrolyser and explores different energy sources for cost-effective power generation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Weiqi Zhang, Xingchen Wang, Meihui Tan, Huiyuan Liu, Qiang Ma, Qian Xu, Bruno G. Pollet, Huaneng Su
Summary: Direct methanol fuel cell (DMFC) and direct ammonia fuel cell (DAFC) have attracted attention for their high energy density, environmental friendliness, and easy availability of liquid fuel. However, the high cost and low durability of platinum (Pt) have limited their large-scale application. In this study, self-supporting electrodes (SSEs) were developed using the square-wave potential (SWP) electro-deposition method, which led to improved catalytic activity and durability compared to conventional electrodes. The SSE with cauliflower-like Pt catalyst exhibited the best performance. This research suggests that SSEs have great potential for practical applications of DMFC and DAFC.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Chemical
Danlin Chen, Feng Yang, Dionysis S. Karousos, Linfeng Lei, Evangelos P. Favvas, Xuezhong He
Summary: The construction of H2 infrastructure is crucial for the future H2 economy. Injecting H2 into existing natural gas pipelines and recovering it using carbon membranes is a feasible alternative for H2 transportation. The developed cellulose-derived carbon membrane showed excellent separation performance and stability, with H2 permeance of up to 21.3 GPU and H2/CH4 separation factor of up to 96. Techno-economic analysis demonstrated the cost-effectiveness of H2 recovery from natural gas pipelines using a two-stage carbon membrane system.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Raffaela Cabriolu, Bruno G. Pollet, Pietro Ballone
Summary: Molecular dynamics simulation was used to study the impact of two ionic liquids (IL) on the nucleation, growth, and collapse of (nano)cavities in water. The first IL, tetra-ethyl ammonium mesylate, decreased the tendency of water to form cavities at 25 wt % concentration. The second IL, tetrabutyl phosphonium 2,4-dimethylbenzenesulfonate, promoted the formation of bubbles at the interface of water and IL-rich domains. The presence of ions hindered the collapse of cavities in [P4444][DMBS]/water solutions.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Review
Polymer Science
Rajangam Vinodh, Shankara Sharanappa Kalanur, Sadesh Kumar Natarajan, Bruno G. Pollet
Summary: This article summarizes one of the inexpensive methods for producing green hydrogen, which is the evolving anion exchange membrane water electrolysis (AEMWE). The most recent achievements in increasing polymer anionic conductivity, understanding AEM degradation mechanisms, and designing electrocatalysts are highlighted. The important issues affecting AEMWE behavior are discussed, as well as future constraints and opportunities. Strategies for producing dynamic and robust AEMWE electrocatalysts are also provided in this review.
Article
Environmental Sciences
Asimina Tremouli, Pavlos K. Pandis, Theofilos Kamperidis, Christos Argirusis, Vassilis N. Stathopoulos, Gerasimos Lyberatos
Summary: The study investigates the effects of different cathode strategies on the performance of air-cathode microbial fuel cells (MFCs). The highest power output was achieved with MnO2 catalyst pasted on Gore-Tex cloth, but the highest coulombic efficiencies were obtained with MnO2 and coal fly ash pasted on ceramic. The utilization of coal fly ash and biochar as catalysts in MFC technology is a sustainable and cost-effective solution.
Article
Chemistry, Physical
Faranak Foroughi, Marina Tintor, Alaa Y. Faid, Svein Sunde, Gregory Jerkiewicz, Christophe Coutanceau, Bruno G. Pollet
Summary: In this study, a method for activating polycrystalline metallic nickel surfaces towards the hydrogen evolution reaction (HER) in N2-saturated 1.0 M KOH aqueous electrolyte was developed through continuous and pulsed ultrasonication. It was found that ultrasonically activated Ni exhibited improved HER activity compared to non-ultrasonically activated Ni, with a much lower overpotential of -275 mV vs RHE at -10.0 mA cm-2. The ultrasonic pretreatment was observed to be a time-dependent process that gradually changed the oxidation state of Ni, and longer ultrasonication times resulted in higher HER activity compared to untreated Ni. This study highlights a straightforward strategy for activating nickel-based materials for the electrochemical water splitting reaction through ultrasonic treatment.
ACS APPLIED ENERGY MATERIALS
(2023)
Review
Electrochemistry
Youness El Issmaeli, Amina Lahrichi, Shankara S. Kalanur, Sadesh Kumar Natarajan, Bruno G. Pollet
Summary: This review examines the application of iron oxyhydroxide (FeOOH) based materials in supercapacitors (SCs). It explores factors that affect their electrochemical performance and proposes improvement strategies such as increasing surface area and facilitating electron transfer and ion diffusion. Additionally, the synergistic effects of composite materials on supercapacitive performance are investigated. FeOOH-based materials show potential for high energy-density SCs, providing an effective pathway in fabricating efficient, cost-effective, and practical energy storage systems for future devices.
Review
Chemistry, Multidisciplinary
Marian Chatenet, Bruno G. Pollet, Dario R. Dekel, Fabio Dionigi, Jonathan Deseure, Pierre Millet, Richard D. Braatz, Martin Z. Bazant, Michael Eikerling, Iain Staffell, Paul Balcombe, Yang Shao-Horn, Helmut Schaefer
Summary: This article explores the use of hydrogen as a sustainable energy carrier, focusing on electrocatalytic water splitting. It covers the fundamentals of the process, the latest scientific findings, and the current industrial processes and large-scale applications. The article also discusses strategies for optimizing electrode materials and includes a technoeconomic analysis of water electrolysis. Overall, it aims to promote collaboration and exchange among researchers in different fields.
CHEMICAL SOCIETY REVIEWS
(2022)
Article
Chemistry, Physical
Chukwuka Bethel Anucha, Emin Bacaksiz, Vassilis N. Stathopoulos, Pavlos K. Pandis, Christos Argirusis, Constantina-Dia Andreouli, Zoi Tatoudi, Ilknur Altin
Summary: In this study, a Mo-doped HRTiO2 photocatalyst was synthesized by sonication method. Its thermal, structural, morphological, and optical properties were characterized. The photocatalyst demonstrated high efficiency in the degradation of IBU under specific conditions, and the stability of its surface coating was confirmed after multiple cycles of testing.
Proceedings Paper
Materials Science, Multidisciplinary
Evangelia G. Deze, Maria D. Bareka, Dionysis S. Karousos, Andreas A. Sapalidis, Evangelos P. Favvas
Summary: This work focuses on the preparation and investigation of hybrid catalytic porous materials, specifically studying their structural and functional properties. By utilizing a modified polyol route and two mesoporous siliceous templates, MCM-41 and MCF, copper nanoparticles (Cu NPs) were successfully synthesized and their size and dispersion on porous hosts were controlled through microwave irradiation. The characterization results confirmed the preparation of Cu NPs with an average diameter of approximately 16 nm in both composites. The catalytic activity of the materials showed enhanced efficiency in NO conversion to CO under stoichiometric conditions at moderate temperatures (around 400 degrees C).
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Engineering, Chemical
Pavlos K. Pandis, Charalampia Kalogirou, Eirini Kanellou, Christos Vaitsis, Maria G. Savvidou, Georgia Sourkouni, Antonis A. Zorpas, Christos Argirusis
Summary: This article introduces the basic mechanism and classification of advanced oxidation procedures (AOPs), and analyzes the reactive species and advantages of each AOP. Finally, the implementation of combined AOPs is considered as an effective solution to address global environmental waste management issues.
