Article
Chemistry, Physical
Xingtao Zhao, Yakun Guo, Zekun Jing, Xue Liu, Ruidong Liu, Ran Tao, Tianyu Cai, Yingjun Li, Yuanlin Zhou, Maobing Shuai
Summary: In this study, formable graphene aerogel hydrogen getters were prepared by integrating alkyne-containing molecules into palladium-loaded three-dimensional layered porous graphene aerogel. The results showed that the Pd-GA/DEB composite materials had a high hydrogen absorption capacity in reducing reactive hydrogen gas.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Anas A. M. Alqanoo, Naser M. Ahmed, Md. R. Hashim, Munirah A. Almessiere, Sofyan A. Taya, Ahmed Alsadig, Osamah A. Aldaghri, Khalid Hassan Ibnaouf
Summary: The applications of silver nanowires (AgNWs) depend on their purity and morphology. In this study, the morphological changes of AgNWs during growth were tracked to determine the optimal reaction time and temperature. UV-Vis absorption spectra were used to investigate the relationship between reaction time and temperature. An equation was developed to calculate reaction time at any given reaction temperature. The average diameter of the AgNWs was found to be temperature-dependent, with the minimum value observed at a reaction temperature of 150°C. A purification technique was conducted to remove by-products, and an AgNWs-based porous Si device was fabricated and showed high sensitivity and detectivity.
Article
Materials Science, Multidisciplinary
Peng Fu, Dong-Chun Yang, Ran Jia, Zhi-Jun Yi, Zhi-Feng Liu, Xiao Li, Roberts Eglitis, Zhong-Min Su
Summary: In this work, a silicon-based counterpart of T-carbon, named T-Si, was designed using density functional theory calculations. The stability of T-Si was confirmed from energetic, mechanical, lattice dynamic, and thermodynamic aspects. Due to space extrusion, delocalized electrons on Si-4 tetrahedrons are squeezed onto inter-tetrahedron Si-Si bonds, making T-Si metallic. Its electronic conductivity was predicted and discussed, and with a low density of 0.869 g/cm(3), T-Si can even float on water, paving the way for future spacecraft and automobile applications.
Article
Chemistry, Multidisciplinary
Jiawei Zhao, Xiaotong Zhang, Jiajia Xu, Wei Tang, Zhong Lin Wang, Feng Ru Fan
Summary: Researchers have discovered a new method to synthesize hydrogen peroxide (H2O2) by contact charging a two-phase interface, yielding stable and high production of H2O2 under room temperature and normal pressure. This finding provides an efficient way for H2O2 preparation and may encourage further exploration of contact-electrification-induced chemistry processes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Multidisciplinary
Christoph Ostwald, Manuel Opfer, Cyril Popov, Thomas Niendorf
Summary: The hot forming process in the automotive industry produces high-strength structural components. However, these materials are susceptible to hydrogen embrittlement. The heat treatment during the process introduces diffusible hydrogen into boron-manganese steels with aluminum-silicon coating. This study investigated the influence of process gases and furnace dwell times on hydrogen uptake, revealing that nitrogen and carbon dioxide gases resulted in higher hydrogen absorption compared to synthetic air and oxygen.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Chemistry, Physical
Meltem Gor Bolen
Summary: The purpose of this review is to summarize the characterization and properties of porous silicon (PS) for hydrogen storage. The study highlights the importance of hydrogen as an intermediate product in silicon porosification technology. It explores the nature of hydrogen bonding in PS and its potential for hydrogen storage, providing valuable insights for understanding and future solutions.
Article
Engineering, Electrical & Electronic
Saeed Moghaddam, Sin Hang Cheung, Mario Noel, Joanne C. Zwinkels, Jean-Marc Baribeau, David J. Lockwood, Stephen K. O'Leary
Summary: This paper provides details on acquiring thin-film optical functions from experimental measurements, focusing on a case study with silicon thin films. It discusses the uncertainty in optical response measurements, the modeling of optical functions, and the elimination of unphysical solutions. The results presented are expected to be of interest to the broader thin-film community.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Wenchao Wang, Lili Du, Ruiqin Xia, Runhui Liang, Tao Zhou, Hung Kay Lee, Zhiping Yan, Hao Luo, Congxiao Shang, David Lee Phillips, Zhengxiao Guo
Summary: This research demonstrates a synergistic strategy of porosity, vacancy, and shallow-state engineering in graphitic carbon nitride (g-C3N4) photocatalyst to enhance its efficiency. By thermally treating the catalyst and doping it with phosphorus, the photocatalyst shows an 800% increase in hydrogen generation and a 5-fold increase in quantum efficiency. The improved performance is attributed to the long-lived shallow charge trapping, which is a result of proton-feeding to the coordinated phosphorus site during the photocatalytic reaction.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Usman Ghani, Nousheen Iqbal, Ahmed A. Aboalhassan, Bowen Liu, Tabish Aftab, Imran Zada, Farman Ullah, Jiajun Gu, Yao Li, Shenmin Zhu, Qinglei Liu
Summary: This work was supported by the National Natural Science Foundation of China and Shanghai Science and Technology Committee, and funded by the State Key Laboratory for Modification of Chemical Fibers and Polymer Materials at Donghua University.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Chemical
Shadfar Davoodi, Hung Vo Thanh, David A. Wood, Mohammad Mehrad, Mohammed Al-Shargabi, Valeriy S. Rukavishnikov
Summary: Machine-learning models can effectively predict the H2-uptake of porous carbon media based on influential variables determined from experiments. Among the four models evaluated, LSSVM showed the best prediction performance with a root mean squared error of 0.2407 wt%.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Kirill A. Gonchar, Daniil Moiseev, Ivan Bozhev, Liubov A. Osminkina
Summary: Porous silicon nanowires (PSi NWs) were fabricated using a two step metal-assisted chemical etching method, and it was found that their structural and optical properties depend on the concentration of hydrogen peroxide. The thickness ratio of layers and size of nanocrystals can be tuned by choosing the required concentration of H2O2.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Green & Sustainable Science & Technology
S. Saedi Ardahaie, M. J. Hosseini, M. Eisapour, A. H. Eisapour, A. A. Ranjbar
Summary: The study focuses on enhancing the storage performance of metal hydride reactors by integrating PCM and spiral tube heat exchangers, showing that increasing the number of FSTPs on the PMHT can reduce absorption duration and improve absorption and desorption performance. The variation in air inlet temperature also affects total desorption and absorption duration. Conical-shaped PCM jackets demonstrate better performance, allowing the PMHT to achieve higher absorption with less PCM usage compared to annulus-shaped PCM jackets.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Rita Pazmany, Krisztina S. Nagy, Akos Zsembery, Angela Jedlovszky-Hajdu
Summary: In this study, the researchers improved the cell penetration of fibrous hydrogel scaffolds using ultrasonication and enhanced the storing conditions and shelf life through freeze-drying process. The specific load capacity of the scaffold remained stable after ultrasonication, while the elongation break increased.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Analytical
Yu Tang, Yunke Bi, Hao Wei, Zhongyu Hou, Zi Wang
Summary: A general method for improving the dynamic range of electrochemical sensing devices based on 3D porous electrodes through morphological optimization has been introduced. By increasing the array height of 3D-pSi, the electrochemical active surface area (EASA) was raised and linear range of detection of H2O2 was expanded, making it crucial for the fast detection of high concentrations of H2O2 in scenarios such as fuel cells and catalytic oxygen reduction reaction systems.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Materials Science, Multidisciplinary
Haoliang Sun, Xinxin Lian, Yuanjiang Lv, Guangxin Wang
Summary: Black Ag-Mo alloy films were spontaneously formed on silver sheets by composite target sputtering, exhibiting strong light trapping effect in the visible wavelength range and reducing the reflectivity substantially. The conical particle arrays on the Ag-Mo alloy films are responsible for the light trapping properties, providing a new idea for fabrication of high light trapping materials.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Materials Science, Multidisciplinary
Amol Kamble, Pratibha Sharma, Jacques Huot
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2020)
Article
Chemistry, Physical
Gianluca D'Olimpio, Danil W. Boukhvalov, Jun Fujii, Piero Torelli, Andrea Marchionni, Jonathan Filippi, Chia-Nung Kuo, Raju Edla, Luca Ottaviano, Chin Shan Lue, Francesco Vizza, Silvia Nappini, Antonio Politano
APPLIED SURFACE SCIENCE
(2020)
Article
Chemistry, Physical
Luca Braglia, Martina Fracchia, Paolo Ghigna, Alessandro Minguzzi, Daniela Meroni, Raju Edla, Matthias Vandichel, Elisabet Ahlberg, Giuseppina Cerrato, Piero Torelli
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Instruments & Instrumentation
G. Vinai, F. Motti, A. Yu Petrov, V Polewczyk, V Bonanni, R. Edla, B. Gobaut, J. Fujii, F. Suran, D. Benedetti, F. Salvador, A. Fondacaro, G. Rossi, G. Panaccione, B. A. Davidson, P. Torelli
REVIEW OF SCIENTIFIC INSTRUMENTS
(2020)
Article
Chemistry, Physical
Avik Karmakar, Aashish Mallik, Nandlal Gupta, Pratibha Sharma
Summary: A 10 kg alloy mass metal hydride reactor was designed with LaNi5 alloy, featuring heat transfer enhancement through embedded cooling tubes and an external water jacket. Parametric studies were conducted to optimize the system's performance, with experiments demonstrating storage capacity and desorption kinetics under various conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Mahvash Afzal, Nandlal Gupta, Aashish Mallik, K. S. Vishnulal, Pratibha Sharma
Summary: This study continues the computational analysis of a reactor with hexagonal honeycomb-based heat transfer enhancements, investigating the performance of a metal alloy and the reactor experimentally. It determines the gravimetric capacity and reaction kinetics of the alloy La0.9Ce0.1Ni5, while also exploring the impact of operating conditions on reactor performance. Additionally, evaporative cooling is tested for the first time as a heat removal technique for metal hydride based hydrogen storage reactors and found to significantly improve heat transfer.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Animesh Hajari, Binayak Roy, Vinit Kumar, Ankita Bishnoi, Pratibha Sharma
Summary: Ammonia borane is considered a potential hydrogen storage material due to its high hydrogen content, ease of handling, and moderate dehydrogenation temperature. By utilizing a cost-effective layered aluminosilicate support material, bentonite, the efficiency of dehydrogenation and regeneration processes of ammonia borane is increased, resulting in higher yield and purity of the regenerated compound.
Article
Chemistry, Physical
Luca Braglia, Francesco Tavani, Silvia Mauri, Raju Edla, Damjan Krizmancic, Alessandro Tofoni, Valentina Colombo, Paola D'Angelo, Piero Torelli
Summary: In this study, the location, structural properties, and reactivity of defective sites in the metal-organic framework HKUST-1 were investigated using ambient pressure operando soft X-ray absorption spectroscopy. The formation of Cu+ defective sites and characterization of Cu+/Cu2+ dimeric complexes arising from temperature treatment were reported. Furthermore, reversible adsorption and desorption of CO2 on the surface defective Cu+/Cu2+ sites were demonstrated.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Elizaveta Pyatenko, Dirk Hauschild, Vladyslav Mikhnych, Raju Edla, Ralph Steininger, Dimitrios Hariskos, Wolfram Witte, Michael Powalla, Clemens Heske, Lothar Weinhardt
Summary: In this study, the chemical structure of the Cu(In,Ga)Se-2 (CIGSe) thin-film solar cell absorber surfaces and their interface with a Ga2O3 buffer layer were investigated. The effects of different treatments on the chemical composition and impurities at the absorber surface were analyzed using various spectroscopic techniques. The results suggest that a specific rinsing step can effectively remove impurities and alter the chemical composition of the absorber layer.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Murilo Fendrich, Om Prakash Bajpai, Raju Edla, Alessandra Molinari, Paola Ragonese, Chiara Maurizio, Michele Orlandi, Antonio Miotello, Hicham Idriss
Summary: Thermally synthesized graphitic carbon nitride combined with pulsed laser deposition led to the fabrication of urchin-like iron oxide thin films, showing improved photocatalytic activity under visible light irradiation for the removal of ciprofloxacin antibiotic. The in situ methodology demonstrated the potential to obtain working heterojunctions for solar photocatalysis in thin-film materials, showcasing a novel petal-like morphology.
APPLIED SCIENCES-BASEL
(2023)
Article
Energy & Fuels
Saurabh Tiwari, Pratibha Sharma
Summary: Hydrogen storage is a major obstacle in the widespread utilization of hydrogen as an energy carrier. This study focuses on developing easy-to-use design charts to evaluate reaction fractions inside the metal hydride bed for various combinations of parameters.
Article
Energy & Fuels
Bipin Sharma, Saurabh Tiwari, Pratibha Sharma
Summary: Synthesis of Mg2Ni intermetallic compound was achieved through mechanochemical route using stoichiometric and slightly superstoichiometric mixtures of Mg and Ni. It was found that optimizing annealing temperature and holding time is crucial for obtaining maximum yield of Mg2Ni. The microstructure of the alloy synthesized under optimal conditions was studied using SEM.
Article
Energy & Fuels
Aashish Mallik, Pratibha Sharma
Summary: This study proposes a cylindrical reactor design embedded with bifurcating longitudinal finned cooling tubes as the heat exchanger for an industrial-scale metal hydride reactor system. The optimization involved seven control factors in an array of L 18 (2(1)3(6)), with the number of cooling tubes, the fin length, and the number of fins identified as critical parameters for optimizing absorption time. The paper highlights the efficiency of the optimized design and the influence of operating parameters on rapid hydrogen charging performance.
Article
Chemistry, Multidisciplinary
Binayak Roy, Urbi Pal, Ankita Bishnoi, Luke A. O'Dell, Pratibha Sharma
Summary: Solid-state H-1-N-14(OT) HMQC, B-11 MQMAS and H-1-B-11 HETCOR NMR experiments were used to investigate the role of homopolar B-B interaction in the thermal dehydrogenation of pure and supported ammonia borane. The study also addressed the subtlety of homopolar interactions in amine borane compounds and their differences from heteropolar interactions.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Amol Kamble, Pratibha Sharma, Jacques Huot
ACS APPLIED ENERGY MATERIALS
(2020)
