Article
Chemistry, Physical
Yongyang Zhu, Yin Wang, Liming Zeng, Daifeng Wu, Cifu Lu, Xu-Sheng Yang, Qing Zhou, Renheng Tang, Fangming Xiao
Summary: MgH2@M(BH4)x composites were synthesized by ball milling MgH2 with cheap metaborates, and the MgH2-4 mol% NaBO2 composite achieved the best hydrolysis performance, releasing 1597.2 mL g-1 of hydrogen in 60 minutes.
ACS APPLIED ENERGY MATERIALS
(2023)
Review
Chemistry, Physical
Umit B. Demirci
Summary: Sodium borohydride (NaBH4) has been considered as a promising hydrogen storage material, but its hydrolysis still faces numerous obstacles. This article aims to assess the progress made in hydrolysis of NaBH4 and summarize the newly acquired knowledge.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Yongyang Zhu, Shaoyang Shen, Xu-Sheng Yang, Liming Zeng, Gary Tsui, Zheng-Long Xu, Qing Zhou, Renheng Tang, K. C. Chan
Summary: This study proposes a cost-effective method to regenerate LiBH4 by ball milling hydrous lithium metaborate with low-cost Mg-based alloys. The introduction of light rare-earth metals into Mg improves the regeneration kinetics of LiBH4 by facilitating the breakage of B-O and conversion of H+ into H-. A yield of 40% can be achieved for LiBO2 center dot 2H(2)O-CeMg12 system with a relatively short ball milling duration of 10 hours. The optimized regeneration of LiBH4 is believed to be efficient and economical, utilizing an intrinsic hydrogen source in LiBO2 center dot 2H(2)O and cheap reducing agents. This finding is expected to promote the widespread use of LiBH4 for hydrogen storage.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Environmental
Geo Jong Kim, Hyun Tae Hwang
Summary: Hydrogen from sodium borohydride can be generated by thermolysis or hydrolysis, but both methods have drawbacks such as high temperatures required or safety concerns. A new process, thermal hydrolysis of SBH, is proposed to address these issues and achieve efficient hydrogen production.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Cafer Saka
Summary: A hybrid g-C3N4-SiO2-N composite was successfully produced using calcination and hydrothermal methods. The composite catalyst showed excellent catalytic performance in the H2 production reaction from NaBH4 methanolysis, with a high hydrogen generation rate and good durability.
Article
Energy & Fuels
Xiugang Li, Nan Yang, Xingmei Cen, Siyuan Li, Lingyu Zhang, Zhang-Hui Lu
Summary: A nitrogen-rich hollow porphyrin framework (H-POF) was synthesized using SiO2 as a template, and ultrafine Ni nanoparticles (NPs) were confined on its surface using an ultrasonic impregnation reduction method. The resulting Ni/H-POF catalyst exhibited exceptional catalytic performance in the methanolysis of NaBH4, with a hydrogen generation rate (HGR) value of 34720 mL·min-1·gmetal-1, surpassing all previously reported heterogeneous catalysts with NaOH. Experimental investigation revealed that the high catalytic activity can be attributed to the large specific surface area and hollow structure of the support, small size of the metal NPs, and the electron-donating effect of nitrogen atoms on the metal NPs. Isotopic experiments confirmed that the breaking of the O-H bond in CH3OH is the rate-determining step (RDS) of NaBH4 methanolysis. This work provides valuable insights for the rational design of nitrogen-rich hollow framework materials for supporting ultrafine metal NPs, which have potential applications in future energy-related fields.
Article
Chemistry, Inorganic & Nuclear
Yongyang Zhu, Hao Zhong, Liuzhang Ouyang, Jiangwen Liu, Hui Wang, Huaiyu Shao, Min Zhu
Summary: In this study, an energy-saving and cost-efficient process for the (re)generation of NaBH4 was reported by ball milling hydrated borax with a Mg-Al alloy under ambient conditions. The introduction of abundant and readily available Al can increase air stability of the reducing agent, and a high yield up to 85.2% could be achieved by using Mg17Al12 due to its hardness and brittleness.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Energy & Fuels
Michael Lutz, Matthias Schmidt, Inga Buerger, Marc Linder
Summary: This research conducts a fundamental analysis of a novel thermochemical system, revealing the technical potential of metal hydrides as energy storage components and indicating the relationship between higher pressure ratio, increased storage density, and decreased efficiency.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Green & Sustainable Science & Technology
Xianzhi Yin, Meiling Hou, Kai Zhu, Ke Ye, Jun Yan, Dianxue Cao, Dongming Zhang, Jiaxin Yao, Guiling Wang
Summary: A novel electrode of PdCu nanoparticles modified rGO framework was fabricated and exhibited excellent catalytic performance for DBHPFC. The superior performance of the optimized electrode can be attributed to its unique structure and the strong adsorption and bond-breaking ability of Pd nanoparticles.
Review
Energy & Fuels
Wan Jefrey Basirun, Syed Tawab Shah, Md. Shalauddin, Shamima Akhter, Nazzatush Shimar Jamaludin, Adeeb Hayyan
Summary: The recycling of sodium borohydride is a major challenge for the hydrogen economy. Mechano-chemical, thermo-chemical, and electrochemical methods are reported for recycling sodium metaborate into sodium borohydride. Electrochemical behavior of borohydride and metaborate in alkaline solutions is described. Challenges, suggestions, and future outlook of electro-reduction for the recycling of metaborate into borohydride are highlighted.
Article
Chemistry, Physical
Kaaviah Manoharan, Vasantha Kumar Palaniswamy, Kannan Raman, Rajashabala Sundaram
Summary: This study focuses on the effective storage of hydrogen using NaBH4/Ah-BN nanocomposite, which shows enhanced specific surface area and favorable binding energy for hydrogen storage. Thermal analysis confirms a two-step dehydrogenation process, while electrochemical testing reveals high discharge capacity and hydrogen storage efficiency. Overall, the prepared NaBH4/Ah-BN nanocomposite demonstrates promising potential as a hydrogen storage system and electrode material for hydrogen fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Dilek Kilinc, Omer Sahin
Summary: In this study, an efficient, environmentally friendly, and stable catalyst was developed for the hydrogen evolution from sodium borohydride hydrolysis. The Ru complex catalyst was successfully synthesized and demonstrated promising durability and catalytic performance. The kinetic performance and mechanism of the catalyst were investigated, providing insights for the rational design and utilization of ruthenium complexes in hydrogen evolution.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Chemistry, Physical
Yongyang Zhu, Jianding Li, Limei Yang, Xu-Sheng Yang, Qing Zhou, Renheng Tang, Shaoyang Shen, Liuzhang Ouyang
Summary: Metal borohydrides have high hydrogen storage capacities and are extensively studied. However, developing a low-cost and high-efficiency closed loop of hydrolysis and regeneration is challenging. This work provides an overview of the latest advances in hydrolysis and regeneration processes of Li(Na)BH4 and Mg(BH4)2, with a focus on NaBH4 hydrolysis and regeneration. The development of catalysts, synthesis techniques, and reducing agents for NaBH4 regeneration are discussed. The use of low-cost transition metal-based catalysts has shown great potential for catalyzing the hydrolysis reaction.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Jifeng Deng, Kurbannisa Kadeer, Chaoyuan Hu, Zewei Xie, Yu Shi, Xiao Liu, Lei Xie, Jinrong Xu, Jie Zheng, Xingguo Li
Summary: In this study, a sponge catalyst for hydrogen generation from liquid hydrogen carriers was developed. The commercial melamine formaldehyde (MF) sponge was modified by grafting polyvinyl alcohol (PVA) through acid-catalyzed acetalization with formaldehyde. The resulting polyvinyl formal/MF (PVF/MF) composite sponge exhibited excellent characteristics as a catalyst, including high activity, high hydrogen storage density, easy catalyst recycling, and quasi-solid state behavior during H-2 generation, as demonstrated in the applications of NaBH4 solution and thermal dehydrogenation of perhydro N-ethylcarbazole.
JOURNAL OF POWER SOURCES
(2023)
Review
Energy & Fuels
Helder X. Nunes, Diogo L. Silva, Carmen M. Rangel, Alexandra M. F. R. Pinto
Summary: The potential of NaBH4-H2-PEMFC system for on-demand power supply is highlighted, although most research focuses on catalytic performance. The challenge of developing a practical reaction system for closing the NaBH4-H2 cycle remains critical, despite efficient NaBH4 regeneration processes being reported. Additionally, a transition towards cleaner methods has been observed over the years.
Article
Materials Science, Multidisciplinary
N. R. Pillalamarri, S. S. Patnaik, S. Piskin, P. Gueldner, E. A. Finol
Summary: The regional mechanical characterization studies of porcine pulmonary arteries reveal significant dissimilarities in mechanical properties across different regions, which can be informative for future studies involving high fidelity finite element models.
EXPERIMENTAL MECHANICS
(2021)
Article
Biophysics
Mirunalini Thirugnanasambandam, Tejas Canchi, Senol Piskin, Christof Karmonik, Ethan Kung, Prahlad G. Menon, Stephane Avril, Ender A. Finol
Summary: The biomechanical characterization of abdominal aortic aneurysms (AAAs) is crucial for assessing rupture risk, but its clinical translation is limited by tool complexity. A new approach using a deformable AAA silicone phantom in a controlled laboratory environment was proposed for analyzing AAA flow and sac volume changes. This study optimized impedance elements, quantitatively characterized attributes of a compliant AAA phantom, and demonstrated the use of MRI for flow visualization and quantification of AAA geometry changes.
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
(2021)
Article
Computer Science, Theory & Methods
E. Fatih Yetkin, Senol Piskin
Summary: The computational capabilities of large high performance computing systems have increased significantly over the past decade, mainly due to advancements in multi-core technology and CPU clock speeds. While systems with over 100 thousand cores are now available for processing, computational simulation tools still require more computational resources. Therefore, it is important to consider soft error tolerance when designing next-generation computing platforms and codes.
Article
Engineering, Biomedical
Narasimha R. Pillalamarri, Senol Piskin, Sourav S. Patnaik, Srinivas Murali, Ender A. Finol
Summary: Pulmonary hypertension is a progressive disease that requires multiple tests for diagnosis, with right heart catheterization being the gold standard. Hemodynamic indices show significant changes as the disease progresses. The study aims to identify computational biomarkers as non-invasive alternatives for diagnosing PH.
ANNALS OF BIOMEDICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Ozge Coskuner, Carlos A. Castilla-Martinez, Oscar Sonzogni, Eddy Petit, Umit B. Demirci, Aysel Kanturk Figen
Summary: A two-step process has been developed to produce formic acid by hydrogenation of CO2 using sodium borohydride in aqueous solution at ambient conditions. The process aims at capturing and transforming CO2 effectively at ambient conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Ozge Coskuner, Aysel Kanturk Figen
Summary: This study evaluates the semi-continuous regime for hydrogen generation from carbon derivatives of ammonia borane using cobalt-doped activated carbon catalyst. Different carbon derivatives exhibit different hydrogen generation rates due to their varying thermal stability. The kinetic rate and activation energy of the hydrolysis reaction are described using power-law and zero-order kinetic models. After the semi-continuous regime, the catalyst remains stable and no leaching of cobalt species into the exhaust solution is observed, although boron accumulation occurs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Bilge Coskuner Filiz, Aysel Kanturk Figen
Summary: This study aims to develop easily recoverable and regenerated catalysts for efficient hydrogen production from alkyl-substituted amine boranes. The results showed that alkyl-substituted amine boranes exhibited slower hydrogen generation rates compared to ammonia borane in the presence of catalysts. Among the different activated carbon support types, the catalyst supported on granule activated carbon demonstrated the best catalytic performance and recyclability activity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Hulya Civelek Yoruklu, Bilge Coskuner Filiz, Aysel Kanturk Figen, Bestami Ozkaya
Summary: Nanoparticles (NPs) are used as enhancement additives in biohydrogen production due to their unique features. In this study, the effectiveness and feasibility of NPs in enhancing biohydrogen production over Clostridium sp. were evaluated using the two-stage TOPSIS method. Iron-containing NPs (hematite, magnetite) were determined to be the most effective and economical NPs for increasing the yield.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Electrical & Electronic
Havva Hande Cebeci, Ibrahim Yilmaz, Oender Yargi, Korkut Acikalin, Ali Gelir, Aysel Kanturk Figen
Summary: Upcycling of electronic waste into metal contented pyrolytic carbon (C-WPCB) was achieved through simple pyrolysis, and the obtained C-WPCB was utilized for supercapacitor electrode preparation. The electrode prepared in 1.5 M H2SO4 solution showed the best performance with specific capacitance, specific power, and specific energy of 39.5 F/g, 25.0 kW/kg, and 16.5 Wh/kg at 5 A/g, respectively.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Review
Radiology, Nuclear Medicine & Medical Imaging
Gilbert Hangel, Barbara Schmitz-Abecassis, Nico Sollmann, Joana Pinto, Fatemehsadat Arzanforoosh, Frederik Barkhof, Thomas Booth, Marta Calvo-Imirizaldu, Guilherme Cassia, Marek Chmelik, Patricia Clement, Ece Ercan, Maria A. Fernandez-Seara, Julia Furtner, Elies Fuster-Garcia, Matthew Grech-Sollars, N. Tugay Guven, Gokce Hale Hatay, Golestan Karami, Vera C. Keil, Mina Kim, Johan A. F. Koekkoek, Simran Kukran, Laura Mancini, Ruben Emanuel Nechifor, Alpay Ozcan, Esin Ozturk-Isik, Senol Piskin, Kathleen M. Schmainda, Siri F. Svensson, Chih-Hsien Tseng, Saritha Unnikrishnan, Frans Vos, Esther Warnert, Moss Y. Zhao, Radim Jancalek, Teresa Nunes, Lydiane Hirschler, Marion Smits, Jan Petr, Kyrre E. Emblem
Summary: Preoperative clinical MRI protocols for gliomas still rely on conventional structural MRI, which does not provide information on tumor genotype and has limitations in the delineation of diffuse gliomas. The GliMR COST action aims to raise awareness about advanced MRI techniques in gliomas and their potential clinical translation. This review summarizes current methods, limitations, and applications of advanced MRI for the preoperative assessment of glioma, and evaluates the level of clinical validation of different techniques.
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2023)
Review
Radiology, Nuclear Medicine & Medical Imaging
Lydiane Hirschler, Nico Sollmann, Barbara Schmitz-Abecassis, Joana Pinto, Fatemehsadat Arzanforoosh, Frederik Barkhof, Thomas Booth, Marta Calvo-Imirizaldu, Guilherme Cassia, Marek Chmelik, Patricia Clement, Ece Ercan, Maria A. Fernandez-Seara, Julia Furtner, Elies Fuster-Garcia, Matthew Grech-Sollars, Nazmiye Tugay Guven, Gokce Hale Hatay, Golestan Karami, Vera C. Keil, Mina Kim, Johan A. F. Koekkoek, Simran Kukran, Laura Mancini, Ruben Emanuel Nechifor, Alpay Oezcan, Esin Ozturk-Isik, Senol Piskin, Kathleen Schmainda, Siri F. Svensson, Chih-Hsien Tseng, Saritha Unnikrishnan, Frans Vos, Esther Warnert, Moss Y. Zhao, Radim Jancalek, Teresa Nunes, Kyrre E. Emblem, Marion Smits, Jan Petr, Gilbert Hangel
Summary: This article introduces the preoperative clinical magnetic resonance imaging (MRI) protocols for gliomas, which still rely on conventional structural MRI. However, this method lacks information on tumor genotype and has limitations in delineating diffuse gliomas. The GliMR COST action aims to raise awareness and discuss the clinical translation of advanced MRI techniques for gliomas.
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2023)
Article
Environmental Sciences
Havva Hande Cebeci, Korkut Acikalin, Aysel Kanturk Figen
Summary: This study aimed to characterize and determine the kinetic parameters of pyrolysis of printed circuit board (PCB) wastes, and analyze the evolved gases at different particle sizes. SEM-EDS, SEM-Mapping, and FTIR were used to examine the structures of PCB wastes. Non-isothermal TG-FTIR analyses were conducted to study the thermal decomposition of PCB wastes, revealing four stages of decomposition with the second stage being the main pyrolysis stage. The apparent activation energies (Ea) for the main pyrolysis stage varied with particle size, contrary to previous studies, and the evolved gas analyses showed that CO2 was the most common emission associated with the decomposition of plastic, brominated compounds, polycarbonate, and epoxy resins in PCB wastes.
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2023)
Review
Cardiac & Cardiovascular Systems
Elisabetta Bianchini, Mai Tone Lonnebakken, Peter Wohlfahrt, Senol Piskin, Dimitrios Terentes-Printzios, Jordi Alastruey, Andrea Guala
Summary: Magnetic resonance imaging and computed tomography accurately assess arterial state and function, but the complexity and technical requirements of some biomarkers hinder their widespread use. This review summarizes current biomarkers related to aortic aging, their principles, required sequences and postprocessing, and their predictive values for cardiovascular events.
JOURNAL OF THE AMERICAN HEART ASSOCIATION
(2023)
Review
Cardiac & Cardiovascular Systems
Jordi Alastruey, Peter H. Charlton, Vasiliki Bikia, Birute Paliakaite, Bernhard Hametner, Rosa Maria Bruno, Marijn P. Mulder, Samuel Vennin, Senol Piskin, Ashraf W. Khir, Andrea Guala, Christopher C. Mayer, Jonathan Mynard, Alun D. Hughes, Patrick Segers, Berend E. Westerhof
Summary: Arterial pulse waves (PWs), such as blood pressure and photoplethysmogram (PPG) signals, are rich sources of information for assessing vascular age and identifying individuals at elevated cardiovascular risk. This review explores the possibilities and limitations of reduced-order biophysical models and theoretical and empirical methods for analyzing PW signals and extracting clinically relevant information. Detailed mathematical derivations are provided, demonstrating the relationships between these models and methods. Suggestions for future research are also outlined to fully utilize the potential of modeling and analyzing PW signals for accurate vascular age assessment.
AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY
(2023)
Meeting Abstract
Biophysics
Senol Piskin, Aya Ahmed Faeek Elgebaly
