Article
Chemistry, Physical
Farlon F. S. Xavier, Alexandre C. Cunha, Teko W. Napporn, Paulo Olivi
Summary: This study investigates the application of the Glycerol Electrooxidation Reaction (GEOR) in alkaline solutions using Rh/C, Ni(OH)2/C, and Rhx{Ni(OH)2}y/C nanocomposites to reduce overpotential and achieve energy savings in electrolyzers. Rh0.3{Ni(OH)2}0.7/C exhibits superior electrochemical performance at low potential, and value-added products are obtained through product analysis.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Hongye Qin, Yukun Ye, Jinhong Li, Wenqi Jia, Siyu Zheng, Xuejie Cao, Guangliang Lin, Lifang Jiao
Summary: Nickel hydroxide has been identified as a promising electrocatalyst for urea oxidation reaction. By doping vanadium and creating oxygen vacancies, the catalyst's activity is enhanced by increasing the number of active sites and lowering the energy barrier for the reaction.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Qing Li, Xinran Li, Jiawei Gu, Yanle Li, Ziqi Tian, Huan Pang
Summary: The synthesis of porous rod-like Ni2P/Ni assemblies via a simple phosphating approach has shown excellent activity in the urea oxidation reaction. The catalyst exhibits low overpotential and Tafel slope, with outstanding durability in electrolytic cells. This work provides a new possibility for fabricating metal phosphides-metal assemblies with advanced performance.
Article
Chemistry, Multidisciplinary
Wanqi Jia, Bowen Liu, Rui Gong, Xinxin Bian, Shichao Du, Siyu Ma, Zichen Song, Zhiyu Ren, Zhimin Chen
Summary: The construction of porous Ni-VN heterojunction nanosheets on nickel foam (Ni-VN/NF) serves as a robust electrocatalyst for simultaneous hydrogen evolution reaction (HER) and 5-hydroxymethylfurfural electrooxidation reaction (HMF EOR), achieving high conversion, yield, and efficiency. Ni-VN/NF demonstrates superior activity for HER and HMF EOR due to the surface reconstruction of Ni-VN heterojunction during oxidation process and local electronic distribution at the heterogenous interface. The integrated Ni-VN/NF||Ni-VN/NF configuration shows a lower cell voltage for H2O-HMF paired electrolysis compared to water splitting.
Article
Chemistry, Multidisciplinary
Mingke Zhu, Yi Yang, Shibo Xi, Caozheng Diao, Zhigen Yu, Wee Siang Vincent Lee, Junmin Xue
Summary: The study demonstrated the efficient removal and degradation of ammonia using Ni-Cu-Fe-OOH material, which could provide new ideas for developing more powerful catalysts in the future. Codoping Cu and Fe can affect the electron distribution around oxygen atoms, facilitating ammonia oxidation.
Article
Chemistry, Physical
Mohamed S. E. Houache, Asma Shubair, Mario G. Sandoval, Reza Safari, Gianluigi A. Botton, Paula V. Jasen, Estela A. Gonzalez, Elena A. Baranova
Summary: In this study, bimetallic Pd@Ni and Au@Ni core-shell nanoparticles were synthesized for glycerol electrooxidation reaction in alkaline media. The addition of Pd and Au to Ni nanoparticles improved catalytic activity and selectivity for glycerate formation. DFT calculations suggested that the addition of Pd or Au to Ni NPs enhances OH adsorption and GEOR intermediates removal by reducing the work function of the nanoparticles.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Bin Liu, Xiao Wang, Suwen Wang, Hui-Qing Peng, Tongyao Xiao, Guihao Liu, Sha Bai, Yufei Zhao, Wenjun Zhang, Yu-Fei Song
Summary: Monolayered Ni-based layered double hydroxides with hydroxyl vacancies exhibit superior performance in methanol-assisted energy-saving hydrogen production system, including activity and promotion of cathodic hydrogen production.
MATERIALS TODAY ENERGY
(2022)
Review
Fisheries
Raz Ben-Asher, Youri Gendel, Ori Lahav
Summary: Electrochemical water treatment is a promising method for replacing biological water treatment in recirculating aquaculture systems (RAS) and establishing a new generation of RAS with improved cost-effectiveness, lower environmental impact, and no start-up periods. This paper provides an overview of the incentives, principles, effects, and design considerations of electrochemical methods in RAS. It also reviews the research and describes various designs and operational configurations. The paper identifies the need for overcoming challenges, such as expanding practice, reducing costs, developing dechlorination strategies, and optimizing disinfection abilities.
REVIEWS IN AQUACULTURE
(2023)
Article
Chemistry, Physical
Kaiwei Zheng, Jinchang Xu, Jiaxi Ruan, Xiulan Li, Zhixuan Yuan, Muzi Yang, Jian Chen, Fangyan Xie, Yanshuo Jin, Nan Wang, Hui Meng
Summary: Transition metal compounds, especially LDHs, exhibit excellent catalytic activity in OER and EOR. NiFe-LDHs perform well in OER with low overpotential and Tafel slope, while NiCo-LDHs show the best performance in EOR. Additionally, LDHs materials demonstrate better stability in EOR compared to OER.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Guihao Liu, Tianqi Nie, Ziheng Song, Xiaoliang Sun, Tianyang Shen, Sha Bai, Lirong Zheng, Yu-Fei Song
Summary: This study investigates the synergistic mechanism between the proton deintercalation of the catalyst and the substrate adsorption in the 5-hydroxymethylfurfural oxidation reaction (HMFOR). A Pd/NiCo catalyst was fabricated by modifying Pd clusters onto a Co-doped Ni(OH)2 support. The results show that the Pd/NiCo catalyst exhibits a low onset potential and a high current density. DFT calculations and in situ XAFS analysis reveal the influence of Co sites on the conformation and band structure of neighboring Ni sites, promoting the formation of Ni3+-O active species. Additionally, the Pd clusters enhance the adsorption of HMF and the formation of Ni3+-O through orbital hybridization.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Huu Tuan Le, Duy Thanh Tran, Thanh Hai Nguyen, Van An Dinh, Nam Hoon Kim, Joong Hee Lee
Summary: This study introduces new electrocatalysts based on 2D NiHN and its derived Pt-SA-2D NiHN, demonstrating promising hydrogen evolution activity with PtSA-1.73-2D NiHN and efficient overall water splitting when combined with 2D NiHN.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Fnu Gorky, Anthony Best, Jacek Jasinski, Bryan J. Allen, Ana C. Alba-Rubio, Maria L. Carreon
Summary: Ammonia synthesis via atmospheric dielectric barrier discharge plasma over nickel nanoparticles supported on silica showed a significant size effect, with the smallest nanoparticle size sample having at least 2 times higher synthesis rate than the larger nanoparticle size sample and nickel bulk. This study observed the size effect in plasma catalysis for the first time and determined the beneficial gas composition for hydrogen sink metal such as nickel under atmospheric plasma conditions.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Sam Johnston, Liam Kemp, Bila Turay, Alexandr N. Simonov, Bryan H. R. Suryanto, Douglas R. MacFarlane
Summary: This study demonstrates that copper-based electrodes exhibit high electrocatalytic activity and selectivity for the oxidation of NH3 to NO2- and NO3- in alkaline solutions, which can be achieved by balancing the kinetics of two mechanisms through adjusting the pH and potential of the electrolyte medium.
Article
Chemistry, Physical
Velusamy Maheskumar, Ahreum Min, Cheol Joo Moon, Raja Arumugam Senthil, Myong Yong Choi
Summary: A rapid and effective method for synthesizing Mo-doped Ni/NiO nanocomposite as a highly efficient urea oxidation reaction electrocatalyst is proposed in this study. The nanocomposite, with increased content of oxidized nickel, shows remarkable activity in both oxygen evolution reaction and urea oxidation reaction, as well as outstanding long-term stability. This work provides a rapid and effective approach for the synthesis of cost-effective and efficient electrocatalysts for clean energy production and wastewater treatment.
Article
Chemistry, Physical
Shi He, Yufeng Chen, Mengdi Wang, Hanggai Nuomin, Peter Novello, Xueqian Li, Siyuan Zhu, Jie Liu
Summary: Ammonia is a promising hydrogen mediator that reduces the cost of hydrogen transportation, but improvements are needed for extracting hydrogen. Ammonia electrolysis is a convenient method for low-cost hydrogen production. Nickel-cobalt nitride nanosheets show high electrocatalytic activity for the ammonia oxidation reaction in non-aqueous solutions.
Article
Chemistry, Analytical
Zohreh Hirbodvash, Elena A. Baranova, Pierre Berini
Summary: Surface plasmon polaritons (SPPs) propagating along a waveguide working electrode are sensitive to changes in the local refractive index, and can be used to measure diffusion constant, bulk concentration, and number of transferred electrons of electroactive species. Experimental validation of the theoretical optical response of a waveguide working electrode showed that increasing SPP power enhances the electrochemical current density.
ANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Anis Allagui, Ahmed S. Elwakil, Chunlei Wang
Summary: This paper aims to demonstrate the four possible mapping functions for voltage or charge inputs and their corresponding time-domain or frequency-domain electrical charge outputs when a capacitive device is voltage-charged. Similarly, there are four more possible combinations when the device is current-charged. The dual relationship between each pair of functions is established using single or double Fourier transforms. All eight system functions align only if a constant time- and frequency-independent capacitance is assumed.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Chemistry, Physical
Ju Wang, Martin Couillard, Elena A. Baranova
Summary: In this study, Cu/Co3O4 catalysts were investigated for the reverse water gas shift (RWGS) reaction. It was found that loading 4 wt.% Cu nanoparticles on Co3O4 improved its electrocatalytic performance. The changes in the active oxidation states of Cu and Co caused by O2- migration under polarization were confirmed by XPS, XRD, and cyclic voltammetry (CV). The study also demonstrated that the exchange current density (i(0)) could serve as an informative tool for predicting the catalytic rate in the instance of RWGS reaction.
Article
Biotechnology & Applied Microbiology
Rafael Garduno, Elena Baranova, Chris Kinsley
Summary: The hydrogen production potential in dark fermentation of high-strength brewery waste slurry was optimized by adjusting the operating conditions. The main end product was butyric acid, accounting for over 50% of the carboxylic acids. Dark fermentation followed by anaerobic digestion is a promising method for treating brewery sludge, with increased energy potential and reduced CO2 emissions.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Chemistry, Physical
Tatiana Morin Caamano, Mohamed S. E. Houache, Mario G. Sandoval, Martin Couillard, Arnaud Weck, Elena. A. Baranova, Yaser Abu-Lebdeh
Summary: The novelty of dinitrile-based electrolytes for CO2ER application is explored. The effects of secondary nitrile group addition and the length of the aliphatic, nonpolar chain on salt solubility, electrolyte conductivity, and CO2 solubility were studied using acetonitrile, adiponitrile, and sebaconitrile. Electrochemical effects were evaluated using cyclic voltammetry (CV) and chronoamperometry (CA) measurements with copper (Cu) and copper oxide (CuO) catalysts. Density functional theory (DFT) calculations were employed to explore CO2 interactions with the solvents. It was found that tuning the polarity of the nitrile solvent greatly affects the physiochemical properties of the electrolyte solutions, especially CO2 solubility and CO2ER.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Electrochemistry
Abdulwadood Al-Ali, Ahmed S. Elwakil, Brent Maundy, Sohaib Majzoub, Anis Allagui
Summary: Electrochemical Impedance Spectroscopy (EIS) is an important diagnostic and monitoring tool in various industries. However, using the conventional frequency-sweep method for EIS in low and ultra low sub-Hz frequencies results in long measurement time. To overcome this issue, a wide-band signal covering the entire frequency range of interest is proposed and validated in this study using the Rudin-Shapiro polynomial. The signal was applied to an RC circuit and compared with the classical frequency-sweep method for verification, and then used for measuring strawberry bio-impedance for age monitoring applications.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Electrochemistry
James W. W. Sturman, Chae-Ho Yim, Zouina Karkar, Elena A. A. Baranova, Mathieu Toupin, Yaser Abu-Lebdeh
Summary: The use of nature-derived biopolymers such as NaCMC and XG as binders in silicon-based anodes for lithium-ion batteries offers advantages over traditional binders such as PVDF. This study compares the electrochemical performance of NaCMC and XG-based silicon electrodes with a low binder content, and investigates the Si-binder interactions and their role in electrode performance using XPS, SEM, and EDX.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Electrochemistry
Anis Allagui, Ahmed S. Elwakil
Summary: The capacitance of capacitive energy storage devices cannot be directly measured, but can be estimated from the input and output signals expressed in the time or frequency domains. In this study, Tikhonov's regularization method is used to solve this problem by adding damping to each SVD component, effectively filtering out components corresponding to small singular values and obtaining a stable solution.
ELECTROCHIMICA ACTA
(2023)
Article
Energy & Fuels
James W. Sturman, Eloi Grignon, Bryony T. McAllister, Chae-Ho Yim, Elena A. Baranova, Dwight S. Seferos, Yaser Abu-Lebdeh
Summary: In this study, a novel small molecule azaacene (SmAz) was synthesized and its electrochemical performance as an anode material in Li-ion batteries was investigated. The results show that SmAz exhibits a reversible capacity of around 550 mA h g(-1) at 50 mA g(-1), which exceeds its theoretical capacity. The activation process and charge storage mechanism of SmAz were also explored, providing insights into the behavior of organic electrodes and potential design features for their improvement.
Article
Engineering, Electrical & Electronic
Anis Allagui, Di Zhang, Ahmed Elwakil
Summary: This study provides experimental evidence supporting Westerlund's conjecture that Dead Matter Has Memory (Westerlund, 1991). Recent studies have observed and reported memory effects in the dynamic response of electric double-layer capacitors (EDLCs), which integrate their prior history of stimulation and state. Different excitation signals were used to quantify these effects, aiming to charge the same device to the same voltage and accumulated charge level but in different ways. It was observed that different yet repeatable discharge patterns occur, proving the existence of memory. This brief aims to provide further experimental evidence of the inherent memory effect in EDLCs in response to time-varying stationary input excitations with different statistical properties.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Engineering, Electrical & Electronic
Ahmed S. Elwakil, Anis Allagui, Costas Psychalinos, Brent J. Maundy
Summary: We propose a new class of nonlinear resonance networks modeled by second-order nonlinear differential equations. By modifying traditional RLC resonance networks and introducing a variable resistor controlled by one of the circuit's state-space variables, we achieve an embedded self-feedback control mechanism. An experimental verification of the modified series resonance circuit's filter response behavior is also presented.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Chemistry, Analytical
Anis Allagui, Mohammed E. Fouda, Ahmed S. Elwakil, Costas Psychalinos
Summary: This study demonstrates a method to accurately estimate the time-domain power and energy of supercapacitors in response to excitation signals, using only the frequency-domain impedance parameters of the device. The results from simulations and experiments show the feasibility and potential of the proposed procedure.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Electrochemistry
Anis Allagui, Osama Awadallah, Bilal El-Zahab, Chunlei Wang
Summary: By examining the frequency-domain response of battery signals, the cyclical performance of batteries can be evaluated. In this study, the short-time Fourier transform is used to deconstruct the charge/discharge signals of lithium-sulfur batteries, allowing the detection of critical changes and potential faults.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Computer Science, Information Systems
Mary Ann George, Ahmed S. Elwakil, Anis Allagui, Costas Psychalinos
Summary: Complex-order PI/PID controllers are designed to control the speed of an induction motor drive and an electric vehicle, offering greater flexibility, robustness, and improved system performance compared to conventional controllers. The controllers are approximated using the Sanathanan Koener iterative method due to the unavailability of commercial complex-order fractance elements. The approximated transfer function can be easily implemented using the AN231E04 Field Programmable Analog Array, and simulation and experimental results show good agreement with theoretical expectations.
Article
Engineering, Electrical & Electronic
Amr Elsonbaty, Anis Allagui, Ahmed S. Elwakil
Summary: This work introduces an extended form of the instantaneous spectral analysis technique (E-ISA), which is capable of dealing with nonergodic signal sources with nonstationary spectra and has a smaller bandwidth utilization compared to the standard Fourier transform.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
