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Tailoring OH* adsorption strength on Ni/NbO_x for boosting alkaline hydrogen oxidation reaction via oxygen vacancy

Chinese Chemical Letters 2025年第7期36卷

作者： Yang, Guo Li, Kai Qu, Hanshi Zhu, Jianbing ru, Chunyu Xiao, Meiling Xing, Wei Liu, Changpeng State Key Laboratory of Electroanalytic Chemistry Jilin Province Key Laboratory of Low Carbon Chemistry Power Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China School of Applied Chemistry and Engineering University of Science and Technology of China Hefei 230026 China CAS – HK Joint Laboratory for Hydrogen Energy Changchun 130022 China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China Powertrain Department Gerneral R&D Institude of China FAW Changchun 130013 China

The development of efficient and robust non-precious metal electrocatalyst to drive the sluggish hydrogen oxidation reaction (HOr) is the key to the practical application of anion exchange membrane fuel cells (AEMFC), which relies on the rational regulation of intermediates’ binding strength. Herein, we reported a simple strategy to manipulate the adsorption energy of OH* on electrocatalyst surface via engineering Ni/NbO_x heterostructures with manageable oxygen vacancy (O_v). Theoretical calculations confirm that the electronic effect between Ni and NbO_x could weaken the hydrogen adsorption on Ni, and the interfacial oxygen vacancy tailor hydroxide binding energy (OHBE). The optimized HBE and OHBE contribute to reduce formation energy of water during the alkaline HOr process. Furthermore, in situ raman spectroscopy monitor the dynamic process that OH* adsorbed on oxygen vacancy and react with adjacent H* adsorbed Ni, confirming the vital role of OH* for alkaline HOr process. As a result, the optimal Ni/NbO_x exhibits a remarkable intrinsic activity with a specific activity of 0.036 mA/cm², which is 4-fold than that of pristine Ni counterpart and surpasses most non-precious electrocatalysts ever reported. © 2025

关键词： Anion exchange membrane fuel cells Heterostructure Hydrogen oxidation reaction Hydroxyl binding energy Non-precious metal catalyst Oxygen vacancy

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Point mutations enhance catalytic efficiency of Geobacillus stearothermophilus α-glucosidase: A biochemical characterization study

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International Journal of Biological Macromolecules 2025年第Pt 1期315卷 144379页

作者： Hekim, Suleyman Kaçıran, Arife Akmehmet, Ayşe Nur Belduz, Ali Osman Bektaş, Kadriye İnan Mamatjan, Yasin Canakci, Sabriye Department of Biology Faculty of Science Karadeniz Technical University Trabzon61080 Turkey Eryiğit Medical Devices Inc. R&D Department Ankara Turkey Department of Biotechnology Gradute School of Natural and Applied Science Karadeniz Technical University Trabzon61080 Turkey Department of Molecular Biology and Genetics Faculty of Science Karadeniz Technical University Trabzon61080 Turkey Faculty of Science Thompson Rivers University 805 TRU Way KamloopsBCV2C 0C8 Canada

α-Glucosidases are important enzymes with a broad spectrum of industrial applications. However, traditional protein engineering often struggles to improve activity without compromising stability and usually demands extensive screening. Here, we targeted the α-glucosidase (AG) from Geobacillus stearothermophilus (Gst), using in silico analyses and literature precedent to select point mutations N61H and N258P. We cloned the mutated gstAG gene into the pET-28a(+) vector and expressed in Escherichia coli. After expressing and purifying both wild-type and mutant enzymes, we performed detailed biochemical assays. Both mutants maintained GstAG's optimum temperature (60 °C) and pH (6.5). However, each displayed enhanced catalytic efficiency: N61H lowered the Michaelis constant (Kₘ) by 1.5-fold and raised the turnover number (kcat) by 1.7-fold relative to the wild type. These results offer a blueprint for engineering α-glucosidases with improved performance, unlocking new commercial and biotechnological applications. © 2025 Elsevier B.V.

关键词： Enzyme kinetics

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Meal intention recognition system based on gaze direction estimation using deep learning for the user of meal assistant robot

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Journal of Institute of Control, robotics and Systems 2021年第5期27卷 334-341页

作者： Park, Hyunji Jang, Inhoon Ko, Kwangeun Applied Robot R&D Department Korea Institute of Industrial Technology Korea Republic of Department of Computer Science & Engineering Hanyang University Korea Republic of Industry Academic Cooperation Foundation Hankyong National University Korea Republic of

Care robots that provide dietary supplements to the elderly and the disabled should be able to intelligently interact with the users’ intention to eat in real-time and provide the food they want. To this end, based on deep learning, we have developed a user interface that facilitates the selection of food to be eaten according to six user gaze directions. A single-stage object-detection deep learning model has been implemented as a lightweight, single-stage object-detection deep learning model that can be installed on commercial tablets, and the accuracy of this model was 0.9857. © ICrOS 2021.

关键词： Human robot interaction

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Effect of grain boundary structures on the behavior of He defects in Ni:An atomistic study

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Chinese Physics B 2017年第9期26卷 137-143页

作者：龚恒风严岩张显生吕伟刘彤任啟森 ATF R&D China Nuclear Power Technology Research Institute Co.LtdShenzhen 518000China Shanghai Institute of Applied Physics Division of Nuclear Materials and EngineeringChinese Academy of SciencesShanghai 201800China Key Laboratory of Interracial Physics and Technology Chinese Academy of SciencesShanghai 201800China Department of Mechanical Engineering University of MichiganAnn ArborMichigan 48109USA

We investigated the effect of grain boundary structures on the trapping strength of HeN（N is the number of helium atoms） defects in the grain boundaries of nickel. The results suggest that the binding energy of an interstitial helium atom to the grain boundary plane is the strongest among all sites around the plane. The He_N defect is much more stable in nickel bulk than in the grain boundary plane. Besides, the binding energy of an interstitial helium atom to a vacancy is stronger than that to a grain boundary plane. The binding strength between the grain boundary and the HeN defect increases with the defect size. Moreover, the binding strength of the HeN defect to the Σ3（112）[110] grain boundary becomes much weaker than that to other grain boundaries as the defect size increases.

关键词： molecular dynamics trapping strength helium defect grain boundary

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VALOrIZATION OF GrEEN MArKET WASTE FOr BIOHYdrOGEN PrOdUCTION 23

VALORIZATION OF GREEN MARKET WASTE FOR BIOHYDROGEN PRODUCTIO...

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23rd World Hydrogen Energy Conference: Bridging Continents by H2, WHEC 2022

作者： Hacıoğlu, İlknur Özmıhçı, Serpil Karapınar, İlgi Küs, Meltem Keleş, Ali Kargül, İlhami Dokuz Eylul University Natural and Applied Sciences Biotechnology Department İzmir35390 Turkey Dokuz Eylul University Engineering Faculty Environmental Engineering Department İzmir35390 Turkey GKE Energy R&D Center Muğla48200 Turkey

ISBN: (纸本)9786250008430

Hydrogen as a clean environmental friendly fuel has the potential to meet energy demand of the world. High organic carbon wastes can be used for biohydrogen production reducing raw material cost. In the energy sector the utilization of green market wastes (GMW) offers certain advantages to produce high value-added products with low cost. An important factor affecting biohydrogen production is temperature. In this study, the GWM (a mixture of lettuce, parsley, spring onion and dill) was used for biohydrogen production by dark fermentation using pretreated anaerobic sludge. Hydrogen production potential at mesophilic conditions (37°C, initial pH 7.2) at different initial substrate concentrations varying between 1000-5000 g wb was utilized. After mesophilic experiments, 5000 g wb was conducted to thermophilic conditions to compare the effect of temperature. The highest CHF (8.9 L) and the highest yield (0.012 mol H2/g TOC) was obtained with 5000 g wet weight in mesophilic conditions. Thermophilic conditions gave higher CHF (14.2 L) when compared with mesophilic one. Thermophilic conditions gave 1.6 times higher yield than mesophilic conditions;demonstrating suitability for organic substrates having high density. © 2022 Proceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference: Bridging Continents by H2. All rights reserved.

关键词： Organic carbon

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Layout analysis and path planning of a robot palletizing production line

Layout analysis and path planning of a robot palletizing pro...

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IEEE International Conference on Automation and Logistics

作者： Liangan Zhang Jiangping Mei Xueman Zhao Jianda Gong Yuan Gong Yaozhu Jiang Jun Sheng Long Sun Department of Mechanical Engineering Tianjin University TJU Tianjin China Robot R&D Centre Jiangyin NEJ Robot Company Limited Jiangyin Jiangsu China

ISBN: (纸本)9781424425020

This paper deals with facility layout analysis and path planning of a robot palletizing production line using a 4-dOF partial closed-loop palletizing robot and two carton conveyors. The layout of the production line is arranged by the reachable workspace of the robot with a goal to achieve the minimum footprint. A straight-line and arc based motion planning approach is proposed under the constraints of joint velocity and acceleration to achieve higher productivity and easier implementation. An example is given to demonstrate the effective of this method.

关键词： Path planning robots Joints Acceleration Layout Production distance measurement

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Characterization of layered polysilane

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JAPANESE JOUrNAL OF applied PHYSICS PArT 2-LETTErS 1996年第3A期35卷 L293-L296页

作者： Nishimura, K Nagao, Y Yamanaka, S MatsuUra, H KDD R&D Laboratories Ohara Kamifukuoka 356 Japan Department of Applied Chemistry Faculty of Engineering Hiroshima University Higashi-Hiroshima 739 Japan

Layered polysilane synthesized according to a new recipe was characterized mainly by photoluminescence (PL) measurement. The PL spectrum of the as-prepared sample had a broad peak at 2.0 eV. The PL peak of a sample annealed at 300 degrees C was also at 2.0 eV, and its PL intensity was several times greater than that of the as-prepared sample. The PL peak of a sample annealed at 400 degrees C was red-shifted and its PL intensity was lower than those of the others. On the other hand, the PL emission from a sample rinsed in HF solution was blue-shifted and had a little lower intensity. The interpretations of the experimental results are discussed.

关键词： layered polysilane siloxene X-ray diffraction infrared absorption photoluminescence anneal in vacuum treatment in diluted hydrofluoric acid

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development of a temperature measurement system for a broiler flock with thermal imaging

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Engineering in Agriculture, Environment and Food 2016年第3期9卷 291-295页

作者： Shen, Pao-Nan Lei, Perng-Kwei Liu, Ya-Cheng Haung, Ying-Jen Lin, Jeng-Liang Department of Bio-industrial Mechatronics Engineering National Chung Hsing University 250 KuoKuang Road Taichung Taiwan Instrument Technology Research Center National Applied Research Laboratories 20 R&D Road VI Hsinchu Science Park Hsinchu Taiwan Department of Biomechatronic Engineering National Chiayi University 300 University Road Chiayi Taiwan

Broiler body temperature is an important indicator of both a broiler's response to its environment and its overall health. This study used an infrared thermal camera to capture the thermal images of a broiler flock in a broiler house and then analyzed the temperatures of the broiler flock by image processing. Given the lack of feathers on a broiler's head and feet, the thermal images showed a raised temperature for these parts, making the head an appropriate part for measuring body temperature. The average or Gaussian filter was first used to smooth the images, after which the Otsu automatic threshold algorithm was used to determine the gray-scale thresholds and to segment the broiler's head and feet, followed by segmenting of the overlapping broiler images via the watershed method. Area filtering was then used to identify the broiler head blocks among the segmented blocks. Finally, the labeling methodology was used to calculate the number of broilers in each image. Analysis results show that the proposed image processing procedures can successfully identify the broiler head and analyze the temperatures of the broiler flock by capturing thermal images from a height of 160 cm and a depression angle of 30°, while achieving an identification accuracy of up to 91.3%. © 2016 Asian Agricultural and Biological Engineering Association

关键词： Temperature measurement

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Performance Analysis of an M/M/1 Queue with Single Working Vacation with Customer Impatience Subject to Catastrophe

Performance Analysis of an M/M/1 Queue with Single Working V...

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International Conference on Mathematical Analysis and Computing, ICMAC 2019

作者： Thilaka, B. Poorani, B. Udayabaskaran, S. Department of Applied Mathematics Sri Venkateswra College of Engineering Kancheepuram602117 India Department of Mathematics KCG college of Technology Chennai600097 India Department of Mathematics Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology Chennai600062 India

ISBN: (纸本)9789813346451

A single server queue with Poisson arrival and exponential service times subject to a policy of single working vacation with customer impatience is considered. The service times are different for an active phase and a working vacation phase. The customer is allowed to leave the system during the working vacation phase. Catastrophes, when they occur, wipe out the system which results in the system being inactive for a random period of time. Explicit expressions for the transient probabilities of the close-down period, maintenance state, active state, working vacation state and system size for active phase and working vacation phase have been obtained. The corresponding steady-state analysis and performance measures are also obtained. The effects of various parameters on the system performance measures are studied using numerical examples. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： disasters

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Comparative study of Mechanical and Electrical Characteristics on High-Strength Steel and Conventional Steel for EV Traction High-Speed Multilayer IPMSM Using rare-Earth Free PM

Comparative study of Mechanical and Electrical Characteristi...

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2023 IEEE International Magnetic Conference - Short Papers, INTErMAG Short Papers 2023

作者： Kim, Ki-O. Jung, Young-Hoon Park, Jin-Cheol Lim, Myung-Seop Hanyang University Department of Automotive Engineering Seoul04763 Korea Republic of Hyundai Motor Company R&d Division Hwaseong18280 Korea Republic of Samsung Electronics Co. Ltd. Robot Business Team Suwan-si16677 Korea Republic of

ISBN: (纸本)9798350338362

In this article, the electrical and mechanical characteristics are compared with multilayer IPMSM (ML-IPMSM) using ferrite permanent magnet (PM) when driven at high-speed according to electrical steel. In high-speed operation, in the case of ML-IPMSM, the mechanical and electrical characteristics change depending on the number of PM layers, PM shape, the number of bridges, and bridge thickness. In addition, ferrite PM has a lower coercive force than Nd PM, therefore irreversible demagnetization (Id) must be considered, and it is affected by the number of layers and PM shape of ML-IPMSM. Therefore, when designing a multilayer IPMSM using ferrite PM for electrical vehicle (EV) traction, all the characteristics must be considered. Compared to conventional electrical steel (CES), High-strength electrical steel (HSES) has advantages in mechanical properties, allowing the ML shape to be relatively free. Accordingly, it is possible to design a shape that is advantageous in electrical performance compared to CES by adjusting ML shape. In this article, all characteristics of each ML-IPMSM applied with HSEC and CES are reviewed through finite element analysis (FEA), and the advantages of HSEC applied motors for high-speed driving motors are presented. To verify the validity of the review contents of this article, experiments are conducted on the manufactured motor, FEA results are compared with the test results. © 2023 IEEE.

关键词： Multilayers

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