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A facile preparation of 3D flower-shaped Ni/Al-LDHs covered by β-Ni(OH)2 nanoplates as superior material for high power application

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Chinese Journal of Chemical Engineering 2019年第10期27卷 2526-2534页

作者： Abrar Khan Raja arumugam senthil Junqing Pan Yanzhi Sun State Key Laboratory of Chemical Resource Engineering Beijing Engineering Center for Hierarchical CatalystsBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China

In the present study,we propose a novel electrode material ofβ-nickel hydroxide covering nickel/aluminum layered double hydroxides via a facile complexation–precipitation *** as-obtained materials with 3-dimensional nanostructures are further utilized as highly capable electrode material in nickel–metal hydride *** electrochemical test results demonstrated theβ-nickel hydroxide covering nickel/aluminum-layered double hydroxides with 28%ofβ-nickel hydroxide provided a superior specific capacity value of 452 m A·h·g-1 in a current density of 5 A·g-1 using 6 M KOH as electrolyte as compared with other *** addition,the optimized sample displays an outstanding cyclic stability along with a huge specific capacity value of320 m Ah·g-1,and very small decay rate of 3.3%at 50 A·g-1 after 3000 cycles of charge/discharge *** indicate that the newly designed material with nanostructures not only provides an efficient contact interface between electrolyte and active species and facilitates the transport of electrons and ions,but also protects the 3-dimensional nickel/aluminum layered double hydroxides,achieving a high specific capacity,fast redox reaction and excellent long-term cyclic ***,theβ-nickel hydroxide covering nickel/aluminum layered double hydroxides with superior electrochemical performance is predictable to be a gifted electrode material in nickel–metal hydride batteries.

关键词： Nanostructures Nickel hydroxide Cathode material Ultrafast charge–discharge Ni–MH batteries

Assembly of low-voltage driven co-production of hydrogen and sulfur via Ru nanoclusters on metal-sulfur coordination:Insights from DFT calculations

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Journal of Energy Chemistry 2024年第12期99卷 541-552页

作者： Ahreum Min Velusamy Maheskumar Dong Hyeon Lee Anuj Kumar Cheol Joo Moon Raja arumugam senthil Myong Yong Choi Core-Facility Center for Photochemistry&Nanomaterials Gyeongsang National UniversityJinju 52828Gyeongsangnam doRepublic of Korea Department of Chemistry(BK21 FOUR) Research Institute of Natural SciencesGyeongsang National UniversityJinju 52828Gyeongsangnam doRepublic of Korea Nano-Technology Research Laboratory Department of ChemistryGLA UniversityMathuraUttar Pradesh 281406India

Herein,we propose a simple and rapid approach for synthesizing a CuS/Ru composite that serves as a bifunctional electrocatalyst to promote hydrogen production and concurrently convert sulfion into a value-added sulfur *** composite comprises Ru nanoclusters supported on the CuS nanostructure,achieved through simple pulsed laser irradiation in liquid *** optimized CuS/Ru-30 electrocatalyst demonstrates remarkable bifunctional electrocatalytic activity,exhibiting a negligible working potential of 0.28 V(***)for the anodic sulfion oxidation reaction(SOR)and a minimal overpotential of 182 m V for cathodic hydrogen evolution reaction(HER)to achieve 10 mA cm^(-2)of current ***,the Cu S/Ru-30 electrocatalyst shows exceptional selectivity for converting sulfion into valuable sulfur during anodic oxidation ***,in a two-electrode electrolyzer system utilizing Cu S/Ru-30 as both the anode and cathode,the SOR+HER coupled water electrolysis system demands only 0.52 V to reach 10 mA cm^(-2),which is considerably lesser compared to the OER+HER coupled water electrolysis(1.85 V).The experimental results and density function theory(DFT)calculations reveal that the strong electron interaction between CuS and Ru nanoclusters generates a built-in electric field,greatly enhancing electron transfer *** significantly boosts the HER performance and facilitates the adsorption and production of sulfur *** study presents a rapid and simple strategy for synthesizing a dual-functional catalyst suitable for low-voltage hydrogen generation while facilitating the recovery of valuable sulfur sources.

关键词： Copper sulfide Ru nanoclusters Pulsed laser irradiation in liquids Sulfion oxidation reaction Hydrogen evolution reaction

Methodology of Integrated Coastal Zone Management Plan Preparation – Case Study of Andaman Islands, India

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Journal of Environmental Protection 2011年第6期2卷 750-760页

作者： Devaraj Asir Ramesh arumugam senthil Vel 不详

Generally, approaches of coastal issues are sectoral basis and solutions have been formed in adhoc fashions which are not long lasting. Integrated Coastal Zone Management (ICZM) is conceived as a holistic management tool working across sectoral, disciplinary, and institutional boundaries. ICZM planning is a continuous process to achieve the goals and objectives by using alternative decisions. ICZM plan is providing boundary conditions for limitation, negotiation and implementation. Planning for coastal management is essentially requires integration of resources, uses, issues, and tools for achieving the management objectives. The ultimate goal of ICZM is to improve the quality of life of human communities. Coastal area management needs integrated, interdisciplinary and multi-sectoral approaches for sustainable utilization of resources, which is the fundamental objective of the resource planners and managers. Methodology for ICZM planning is differing in relation to the regional culture, society, economics, politics, nature, technology, scientific, human behavior, etc. Planning for coastal management is very easy by following the methodology or framework developed for the planning process. A case study of ICZM Plan for Andaman has been prepared by using the participatory methodology, which is the source of consensus for all stakeholders of the Andaman Islands. The tasks of ICZM Plan preparation for Andaman Islands includes, knowledgebase development, selection of ICZM plan preparation methodologies, conflict identification, risk analysis, cost benefit analysis, strategic and action plans, recommendations and institutional changes. This ICZM methodology could be used for comparing and understanding the boundary conditions of union or federal developing nations towards comparative planning.

关键词： ICZM Methodology Database Planning Strategy Andaman

FPGA Based Speed Control of SRM with Optimized Switching Angles by Self Tuning

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Circuits and Systems 2016年第8期7卷 1530-1545页

作者： P. Saravanan R. arumugam M. senthil Kumaran Department of Electrical and Electronic Engineering SSN College of Engineering Kalavakkam India

The electromagnetic torque and speed in Switched Reluctance Motor (SRM) greatly depend on the excitation parametersi.e. turn-on angle, turn-off angle, dwell angle and magnitude of the phase currents of its phases. At lower speeds, a change in the current contributes the torque requirement which can be achieved either by voltage control (pulse width modulation) or instantaneous current control techniques. At high speeds, due to high back EMF, the regulation of current is crucial and achieved with the control of switching angles of phases. This type of control is referred as average torque control, where the torque is averaged over one stroke (2π/Nr). With constant dwell angle, advancing the phase angle influences the current into the phase winding at minimum inductance position. It has more time to get the current out of the phase winding before the rotor reaches the negative inductance slope. To maintain the speed of the motor at different load conditions, the turn-on and turn-off angles are adaptively varied. The change in dwell angle may be required where the turn-on and turn-off angle may not be sufficient to reach the required speed. In this paper, a new algorithm is proposed for self tuning of switching parameters of SRM. The proposed algorithm is simulated in MATLAB-Simulink and experimentally validated with Field Programmable Gated Array (FPGA) using MATLAB- system generator environment.

关键词： Switched Reluctance Motor Speed Control Optimized Switching Angles FPGA Nexys-4 MATLAB-System Generator

Optimal Power Flow Solution Using Particle Swarm Optimization Technique with Global-Local Best Parameters

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Journal of Energy and Power Engineering 2010年第2期4卷 46-51页

作者： P. Umapathy C. Venkatasehsiah M. senthil arumugam Faculty of Engineering and Technology Multimedia University Melaka 75450 Malaysia

This paper proposes an efficient method for optimal power flow solution （OPF） using particle swarm optimization （PSO） technique. The objective of the proposed method is to find the steady state operation point in a power system which minimizes the fuel cost, while maintaining an acceptable system performance in terms of limits on generator power, line flow limits and voltage limits. In order to improvise the performance of the conventional PSO （cPSO）, the fine tuning parameters- the inertia weight and acceleration coefficients are formulated in terms of global-local best values of the objective function. These global-local best inertia weight （GLBestlW） and global-local best acceleration coefficient （GLBestAC） are incorporated into PSO in order to compute the optimal power flow solution. The proposed method has been tested on the standard IEEE 30 bus test system to prove its efficacy. The results are compared with those obtained through cPSO. It is observed that the proposed algorithm is computationally faster, in terms of the number of load flows executed and provides better results than the conventional heuristic techniques.

关键词： Particle swarm optimization swarm intelligence optimal power flow solution inertia weight acceleration coefficient.