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Synthesis of high performance electrocatalyst material for OER by hydrothermal method based on CoSnO3/rGO composite

Journal of Sol-Gel Science and technology 2025年第3期114卷 1082-1094页

作者： Khan, Areesha Gouadria, Soumaya Chandra, Subhash Makasana, Jayanti Ballal, Suhas Krithiga, T. Pathak, Piyus Kumar Chaudhary, Rahul Raj Mishra, V.L. Kumar, Abhinav Department of Chemistry Government Graduate College Taunsa Sharif Taunsa32100 Pakistan Department of Physics College of Science Princess Nourah bint Abdulrahman University P.O. Box 84428 Riyadh11671 Saudi Arabia Electrical Engineering Department GLA University Mathura281406 India Marwadi University Research Center Department of Chemistry Faculty of Science Marwadi University Gujarat Rajkot360003 India Karnatka Bangalore India Department of Chemistry Sathyabama Institute of Science and Technology Tamil Nadu Chennai India Department of Applied Sciences-Chemistry NIMS Institute of Engineering & Technology NIMS University Rajasthan Jaipur India Centre for Research Impact & Outcome Chitkara University Institute of Engineering and Technology Chitkara University Punjab Rajpura140401 India Department of Mechanical Engineering Chandigarh Engineering College Chandigarh Group of Colleges-Jhanjeri Mohali140307 India Department of Nuclear and Renewable Energy Ural Federal University Named after the First President of Russia Boris Yeltsin Ekaterinburg620002 Russia Department of Mechanical Engineering and Renewable Energy Technical Engineering College The Islamic University Najaf Iraq

The development of advanced electrocatalysts for oxygen evolution reaction (OER) is essential for improving effectiveness of electrocatalytic water splitting (EWS). Perovskite-type oxides acquired attention for their outstanding electrocatalytic capabilities in OER performance. This research involved the preparation of reduced graphene oxide (rGO) based perovskite CoSnO3 material via basic hydrothermal technique to improve OER efficiency. The produced composite was tested by multiple analytical methods to evaluate its structural, surface area and compositional properties. CoSnO3/rGO catalyst demonstrated a remarkable overpotential (η) of 209 mV at 10 mA cm−2, along with Tafel slope (36 mV dec−1), showcasing enhanced OER performance. Electrochemical surface area (ECSA) of CoSnO3/rGO catalyst was obtained to be 642.5 cm2, with enhanced cyclic durability of 35 h and least charge transfer resistance (Rct) of 0.88 Ω. The outcomes indicated that incorporating rGO resulted in an increased surface area (SA), which enhanced conductivity and significantly improved the OER activity of the catalysts. The noteworthy electrochemical characteristics of CoSnO3/rGO composite render it a superior material for applications in electrical and various other domains in the future. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.

关键词： Carbon carbon composites

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Development of robust Al2S3/Sn2Bi2O7 nanohybrid as an active electrocatalyst for incredible oxygen evolution reaction via hydrothermal route

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International Journal of Hydrogen Energy 2025年 131卷 298-307页

作者： Alsalhi, Sarah A. Ramzan, Misbah Kumar, Abhinav Chandra, Subhash Makasana, Jayanti Ballal, Suhas Sharma, R.S.K. Pathak, Piyus Kumar Chaudhary, Rahul Raj Mishra, Vijay L. Department of Physics College of Science Princess Nourah bint Abdulrahman University P.O. Box 84428 Riyadh11671 Saudi Arabia Department of Chemistry Government Graduate College Taunsa Sharif 32100 Pakistan Department of Nuclear and Renewable Energy Ural Federal University Named after the First President of Russia Boris Yeltsin Ekaterinburg620002 Russia Department of Mechanical Engineering and Renewable Energy Technical Engineering College The Islamic University Najaf Iraq Department of Mechanical Engineering Karpagam Academy of Higher Education Coimbatore641021 India Electrical Engineering Department GLA University Mathura281406 India Marwadi University Research Center Department of Chemistry Faculty of Science Marwadi University Gujarat Rajkot360003 India Karnataka Bangalore India Department of Chemistry Raghu Engineering College Andhra Pradesh Visakhapatnam531162 India Department of Applied Sciences-Chemistry NIMS Institute of Engineering & Technology NIMS University Rajasthan Jaipur India Centre for Research Impact & Outcome Chitkara University Institute of Engineering and Technology Chitkara University Punjab Rajpura140401 India Department of Mechanical Engineering Chandigarh Engineering College Chandigarh Group of Colleges-Jhanjeri Punjab Mohali140307 India

Developing a competent alternative electrocatalyst for hydrogen (H2) synthesis through water oxidation is essential to meeting global energy demands and addressing climate-related issues. Forming a highly productive, affordable and effective catalyst is critical to enhancing the sluggish oxygen evolution reaction. The hydrothermal route was applied to develop an Al2S3/Sn2Bi2O7 nanohybrid as a proficient catalyst for effective water electrolysis. Several physical methods assessed the developed nanohybrid's crystallinity, morphology, surface area, thermal stability. The morphology of the nanohybrid shows an increased surface area which enhances active spots with rapid charge transfer capability and prolongs the material's durability. The enormous surface area of the Al2S3/Sn2Bi2O7 nanohybrid makes it an appropriate candidate for conducting the OER activity. The Al2S3/Sn2Bi2O7 was deposited over nickel foam (NF) to evaluate the electrocatalytic nature. Electrochemical analysis indicated that the prepared nanohybrid has a minimal Tafel plot (38 mV/dec) and overpotential (198 mV) at 10 mA/cm2 optimal current density. Al2S3/Sn2Bi2O7 nanohybrid shows a reduced onset potential (1.25 V) and a remarkable endurance for 50 h. The electrochemical result shows that introducing Sn2Bi2O7 into Al2S3 leads to a boosted surface area and more active spots and promotes the quick transfer of electrolytic ions. The developed nanohybrid can be exploited for other energy conversion applications. © 2025 Hydrogen Energy Publications LLC

关键词： Hydrothermal synthesis

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Decentralized linear–quadratic control and stabilization for networked control systems with d-step delay

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Automatica 2025年 177卷

作者： Wang, Na Li, Hongdan Lu, Xiao Li, Xun Zhang, Huanshui College of Electrical Engineering and Automation Shandong University of Science and Technology Qingdao266590 China College of Energy Storage Technology Shandong University of Science and Technology Qingdao266590 China Department of Applied Mathematics The Hong Kong Polytechnic University Kowloon Hong Kong China

This technical communique studies decentralized state feedback control and stabilization for networked control systems with time delay. Unlike previous studies with conservative conditions — such as lower block triangular systems, uncorrelated process noises, and classical information structures — we investigate a more general coupled system with a non-classical d-step delayed state sharing pattern and correlated process noises. The main challenge lies in that variable measurability of controllers caused by time delay complicates solving forward–backward stochastic difference equations which can be addressed using linear controller forms and the projection theorem. The key contributions are: (1) deriving an explicit form of the optimal linear controllers via Riccati equations, and (2) providing a sufficient condition for mean-square boundedness. A dual-motor drive system is used to validate the theoretical results. © 2025 Elsevier Ltd

关键词： Networked control systems

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Study of structural, electronic, phonon, thermodynamic, and hydrogen storage properties of hydride Rb2AsSnH6 perovskites: DFT insights

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International Journal of Hydrogen Energy 2025年 133卷 225-234页

作者： Zang, Zhaoliang Lu, Xu Hussain, Asghar Shahzad, Muhammad Khuram Hussain, Shoukat Kumar, Abhinav Rekha, M.M. Pattanayak, Binayak Tirth, Vineet Hussien, Mohamed Mechanical Engineering and Automation College of Logistics Engineering Shanghai Maritime University 1550 Haigang Avenue Lingang New City Pudong New Area Shanghai201306 China Safety Engineering College of Marine Science and Engineering Shanghai Maritime University 1550 Haigang Avenue Lingang New City Pudong New Area Shanghai201306 China Institute of Physics Khwaja Fareed University of Engineering and Information Technology Rahim Yar Khan64200 Pakistan Department of Nuclear and Renewable Energy Ural Federal University Named after the First President of Russia Boris Yeltsin Ekaterinburg620002 Russia Centre for Research Impact & Outcome Chitkara University Institute of Engineering and Technology Chitkara University Punjab Rajpura140401 Azerbaijan Department of Mechanical Engineering and Renewable Energy Technical Engineering College The Islamic University Najaf Iraq Karnataka Bangalore India Odisha Bhubaneswar751030 India Central Labs King Khalid University AlQura'a P.O. Box 960 Abha Saudi Arabia Mechanical Engineering Department College of Engineering King Khalid University Abha61421 Saudi Arabia Department of Chemistry Faculty of Science King Khalid University P.O. Box 9004 Abha61413 Saudi Arabia

In recent years, scientists have concentrated extensively on hydrogen storage materials due to their potential to store massive amounts of clean energy. In this study, the structural, mechanical, and optoelectronic properties of the novel perovskite hydride Rb2AsSnH6 are computationally explored using the CASTEP package with the GGA-PBE functional to evaluate its appropriateness for hydrogen storage applications. The optimized cubic crystal structure of Rb2AsSnH6 exhibits a lattice constant of 8.50 Å. The material demonstrates thermodynamic and mechanical stability, as evidenced by its positive phonon frequencies, positive elastic constants (meeting Born stability criteria), and negative formation enthalpy. Electronic band structure and density of states (DOS) analyses confirm its metallic nature, with overlapping valence and conduction bands yielding a zero bandgap. Mechanical properties, including Pugh's ratio (0.43), Poisson's ratio (2.21), and Cauchy's pressure (C11−C44 = 6.72 GPa), suggest ionic bonding and ductile behavior. Optical properties such as dielectric function, absorption spectra, refractive index, and conductivity further indicate that Rb2AsSnH6 is promising for optoelectronic devices, photonics, and energy storage systems. Finally, the calculated gravimetric hydrogen storage capacity of 1.63 wt % highlights its potential for practical hydrogen storage applications. These findings suggest that Rb2AsSnH6 is a compelling candidate for advancing hydrogen storage technologies and multifunctional material design. © 2025 Hydrogen Energy Publications LLC

关键词： Temperature distribution

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Semiconductor Manufacturing Industry: Assessment, Challenges, and Future Trends 2

Semiconductor Manufacturing Industry: Assessment, Challenges...

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2nd International Conference on Advanced Innovations in Smart Cities, ICAISC 2025

作者： Musa, Yasmin Tantawi, Khalid Mikhail, Maged Ma, Jeffrey Alharthi, Dalal Flatt, Larry Potter, Lyn Motlow State Community College Department of Career Readiness SmyrnaTN United States Department of Engineering Management and Technology University of Tennessee at Chattanooga TN United States Purdue University Northwest Hammond Department of Engineering Technology IN United States Saint Louis University Saint Louis Department of Mechanical Engineering MO United States College of Applied Science and Technology University of Arizona Tuscan AZ United States Robotics and Automation Center Motlow State Community College McMinnvilleTN United States Chattanooga State Community College Chattanooga State Community College Dept. of Engineering Systems Tech. ChattanoogaTN United States

ISBN: (纸本)9798331506995

In this work we evaluate the state of the semiconductor manufacturing industry and its challenges and trends. Future trends in the industry are analyzed from three perspectives: the evolution of Industry 4.0, the advances in semiconductor materials, and the impact of the Covid-19 Pandemic. The semiconductor manufacturing industry witnessed an acute decline in the United States and other regions in the two decades prior to the CoVid-19 pandemic. The decline was only uncovered after the chip shortage of 2021 that resulted from the severe supply chain disruption. Trends in the industry were analyzed from three perspectives: Industry 4.0, advances in materials, and the Post-pandemic era. As a result of the evolution of the fourth generation of industry (Industry 4.0), trends in semiconductor manufacturing include robotization, which caused the industry to become the largest market for industrial robotics since 2020, and an all-time peak globalization. The semiconductor industry is a very globalized industry with corporates from different parts of the world taking part in the production of the final product. Although some materials such as carbon and Gallium Nitride show promising trends to replace silicon as the material of choice. It will likely not be before two or three decades when a semiconductor material will be able to replace silicon. Challenges for the industry include the shortage of the trained-workforce, and the added inter-country restrictions that may hinder the globalization of the industry. © 2025 IEEE.

关键词： Semiconductor alloys

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Pulsed-Laser Testing to Evaluate Transient Dose Rate Effect on a Commercial-off-the-Shelf FPGA

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IEEE Transactions on nuclear Science 2025年

作者： Li, Yang Peng, Zhigang Guo, Yaxin Tang, Ge Li, Junlin Li, Ruibin Chen, Wei Xiao, Yao Li, Yonghong Li, Mo He, Chaohui Zhang, Guohe Xi’an Jiaotong University School of Microelectronics Xi’an710049 China Xi’an Jiaotong University School of Nuclear Science and Technology Xi’an710049 China Chengdu University of Technology College of Nuclear Technology and Automation Engineering Chengdu610059 China Northwest Institute of Nuclear Technology National Key Laboratory of Intense Pulsed Radiation Simulation and Effect Xi’an710024 China University of Electronic Science and Technology of China School of Electronic Science and Engineering Chengdu611731 China

To overcome the complexity and challenges of transient γ irradiation experiments, this paper adopted pulsed lasers to simulate the transient dose rate effect (TDRE) on a commercial off-the-shelf (COTS) field-programmable gate array (FPGA), taking advantage of good stability, low interference, high efficiency, and low cost. Three test programs were designed for the Virtex-5 XC5VSX95T FPGA, including one program used in previous transient γ irradiation experiments. Laser experiments involved a wide energy range, and recorded failure features of the device under test (DUT) and photocurrents on the power supplies. By comparing the results with transient γ irradiation experiments, it was demonstrated that pulsed lasers can be used to effectively simulate FPGA’s TDRE, showing consistent effect characteristics. Additionally, the sensitivity of the internal clock and logic resources of the FPGA was analyzed, finding that delaylocked loops (DLLs) have a high sensitivity and that disturbances in the logic resources could propagate. There are multiple factors affecting the internal sensitivities. Furthermore, like transient γ rays, high-intensity pulsed lasers would also induce dynamic reconfiguration of the FPGA, which was analyzed specifically. These research findings are important supplements to studying FPGA’s TDRE, and also demonstrate a significant prospect of using pulsed lasers to simulate the TDRE in very large-scale integrated (VLSI) circuits. © 1963-2012 IEEE.

关键词： Gamma rays

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High temperature steam oxidation behavior of AlCrNbTiZr high entropy alloy coating modified by irradiation-induced atomic diffusion

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Surface and Coatings technology 2025年 511卷

作者： Yang, Zhaoming Zeng, Yuhuan Ma, Yinghao He, Hengji Gu, Ming Zeng, Guoqiang Liu, Chunhai College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu610059 China China Institute for Radiation Protection Taiyuan030006 China College of Materials and Chemistry & Chemical Engineering Chengdu University of Technology Chengdu610059 China School of Integrated Circuit Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China Post-Doctoral Research Station of Nuclear Science and Technology Chengdu University of Technology Chengdu610059 China

High entropy alloys (HEAs) are considered as potential accident tolerant fuel (ATF) coatings due to their excellent properties. However, there is still a lack of understanding about the effects of irradiation on the steam oxidation behavior, which hinders the design of advanced ATF HEAs coatings. In the current work, the steam oxidation behavior of Au ions irradiated AlCrNbTiZr HEA coatings was investigated. It is found that irradiation changes the high-temperature steam oxidation behavior of the material primarily by enhancing elemental diffusion. Irradiation accelerated oxidation by increasing the diffusion rate and depth of oxygen (O). Irradiation optimized the phase composition of the surface oxide layer by enhancing outward diffusion of Ti, thereby releasing releases the growth stress of oxides and avoids cracking and peeling of the surface oxide layer. © 2025 Elsevier B.V.

关键词： Diffusion coatings

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Performance Evaluation of New PET/CT DigitMI 930

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IEEE Transactions on Radiation and Plasma Medical Sciences 2025年第5期9卷 578-585页

作者： Zhang, Bo Li, Bingxuan Fang, Lei Zhou, Xiaoyun Li, Ang Zhang, Xuan Liu, Yang Wang, Zhuo Kao, Chien-Min Liu, Yuqing Zhu, Xiaohua Wan, Lin Xiao, Peng Chen, Xun Iida, Hidehiro Knuuti, Juhani Xie, Qingguo Huazhong University of Science and Technology Department of Biomedical Engineering Hubei Wuhan430074 China Institute of Artificial Intelligence Hefei Comprehensive National Science Center Anhui Hefei230088 China Huazhong University of Science and Technology School of Artificial Intelligence and Automation Hubei Wuhan430074 China University of Science and Technology of China Department of Electronic Engineering and Information Science Anhui Hefei101127 China Department of Radiology University of Chicago ChicagoIL60637 United States Huazhong University of Science and Technology Tongji Medical College Department of Nuclear Medicine Tongji Hospital Hubei Wuhan430032 China Huazhong University of Science and Technology School of Software Engineering Hubei Wuhan430074 China University of Turku Turku University Hospital Turku PET Centre Turku20520 Finland

The study evaluates the performance of the DigitMI 930 positron emission tomography (PET)/CT system, featuring detector modules with an 1:1:1 coupling of the scintillation crystal, the photosensor, and the electronic readout channel, in adherence to the NEMA NU 2-2018 standard. Moreover, brain and whole-body images were used to assess image quality. The radial, tangential, and axial resolutions at a radial offset of 1 cm were 3.9, 3.9, and 3.7 mm, respectively. The average sensitivity was measured at 16.2 cps/kBq. The peak noise-equivalent count rate was calculated as 412.5 kcps at 34.5 kBq/mL. At an activity concentration of 5.3 kBq/mL, the scatter fraction was 37.5%, and the time-of-flight (TOF) resolution was 248.6 ps. The contrast recovery coefficient ranged from 70.6% to 87.7% with TOF reconstruction. Despite increased noise in shorter whole-body scans, critical lesions remained identifiable at 20-s durations per bed position. The DigitMI 930 PET/CT system demonstrates a strong overall performance, particularly noteworthy for its low spatial resolution to crystal size ratio in comparison to other clinical PET systems. Moreover, the clinical studies indicate that the DigitMI 930 PET/CT system is capable of generating high-quality clinical images with high sensitivity for detecting small lesions, even at low injection doses or short scanning times. © 2017 IEEE.

关键词： Positron emission tomography

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Quantitative energy-dispersive X-ray fluorescence analysis for unknown samples using full-spectrum least-squares regression

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nuclear Science and Techniques 2019年第3期30卷 149-159页

作者： Yong-Li Liu Qing-Xian Zhang Jian Zhang Hai-Tao Bai Liang-Quan Ge The College of Applied Nuclear Technology and Automation Engineering Chengdu University of Technology

The full-spectrum least-squares(FSLS) method is introduced to perform quantitative energy-dispersive X-ray fluorescence analysis for unknown solid *** on the conventional least-squares principle, this spectrum evaluation method is able to obtain the background-corrected and interference-free net peaks, which is significant for quantization analyses. A variety of analytical parameters and functions to describe the features of the fluorescence spectra of pure elements are used and established, such as the mass absorption coefficient, the Gi factor, and fundamental fluorescence formulas. The FSLS iterative program was compiled in the C language. The content of each component should reach the convergence criterion at the end of the calculations. After a basic theory analysis and experimental preparation, 13 national standard soil samples were detected using a spectrometer to test the feasibility of using the algorithm. The results show that the calculated contents of Ti, Fe, Ni, Cu, and Zn have the same changing tendency as the corresponding standard content in the 13 reference samples. Accuracies of 0.35% and 14.03% are obtained, respectively, for Fe and Ti, whose standard concentrations are 8.82% and 0.578%, respectively. However, the calculated results of trace elements (only tens of lg/g) deviate from the standard values. This may be because of measurement accuracy and mutual effects between the elements.

关键词： Energy-dispersive X-ray fluorescence analysis Full-spectrum least-squares method Effective atomic number Mass attenuation coefficient Fundamental parameter method

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Temperature-stabilized ultra-low temperature co-fired molybdate composite ceramics for superposition state generator between vortex and spherical waves

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Ceramics International 2025年

作者： Li, Fuyu Li, Yuanxun Li, Chuming Shang, Yanfeng Huang, Liyuan College of Nuclear Technology and Automation Engineering Chengdu University of Technology Sichuan Chengdu610059 China School of Electronic Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China Tianfu Jiangxi Laboratory Chengdu641419 China

Interference superposition states between vortex and spherical waves can further enhance the spectrum utilization of wireless communication technologies. Here, a temperature-stabilized 0.55 Li2Mg1.94Zn0.06Mo3O12∼0.45 Li0.5Bi0.5MoO4 composite ceramic is synthesized using a solid-state reaction method. This ceramic sintered at 600 °C has excellent microwave dielectric properties (Εr = 12.5, Q × f = 22779 GHz, and τf = +5.7 ppm/°C). For the first time, this composite ceramic is used to design and demonstrate an array device for generating a superposition state between vortex and spherical waves. The superposition state is achieved by the interference between x- and y-polarized waves. The transmission amplitudes are all above 0.66 and the transmission phase covers 360°. It is revealed that the generation state can be controlled by switching the polarization state of the incident wave, including vortex wave, spherical wave and superposition state. The superposition state consists of three helical stripes rotating counterclockwise. This work promotes the development of the ULTCC field and further broadens the range of dielectric ceramic applications. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Ceramic products

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