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  1. Article ; Online: Standing NiFe LDH nanosheets on stainless steel fibers felt

    Yanqi Liu / Zhaohai Song / Zheng Li / Minmin Han / Yongliang Cheng / Zongmin Zheng

    Catalysis Communications, Vol 164, Iss , Pp 106425- (2022)

    A synergistic impact on the oxygen evolution reaction (OER) for the water splitting

    2022  

    Abstract: Controllable preparation of NiFe layered double hydroxides (LDH) on suitable conductive substrate is always a key precondition for their wide applications. Standing NiFe LDH nanosheets were successfully grown on stainless steel fibers felt (SSFF) at room ...

    Abstract Controllable preparation of NiFe layered double hydroxides (LDH) on suitable conductive substrate is always a key precondition for their wide applications. Standing NiFe LDH nanosheets were successfully grown on stainless steel fibers felt (SSFF) at room temperature. The prepared SSFF@ NiFe LDH electrocatalyst displayed a high electrocatalytic performance for the oxygen evolution reaction (OER) in alkaline electrolyte as well as alkaline seawater. The effects of mass loading and molar ratio of Ni/Fe on the electrocatalytic activity were also evaluated. With the optimized electrode, the overpotential for the anodic OER process only needs 198 and 260 mV at a current density of 10 and 300 mA cm−2, respectively.
    Keywords Stainless steel ; NiFe LDH ; OER ; Water splitting ; Alkaline seawater ; Chemistry ; QD1-999
    Language English
    Publishing date 2022-04-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Fe-doped Ni2P porous nanofibers as highly efficient electrocatalyst for oxygen evolution reaction

    Jiang Liu / Chuyu Li / Qing Ye / Lu Lin / Yufeng Wang / Min Sun / Yongliang Cheng

    Catalysis Communications, Vol 163, Iss , Pp 106416- (2022)

    2022  

    Abstract: Developing a novel oxygen evolution reaction (OER) electrocatalyst with high activity and low-cost is a major challenge for an electrocatalytic water-splitting technology. Herein, Fe-doped Ni2P (Fe-Ni2P) porous nanofibers were fabricated as highly ... ...

    Abstract Developing a novel oxygen evolution reaction (OER) electrocatalyst with high activity and low-cost is a major challenge for an electrocatalytic water-splitting technology. Herein, Fe-doped Ni2P (Fe-Ni2P) porous nanofibers were fabricated as highly efficient OER electrocatalyst. Benefiting from the abundant and uniformly distributed active sites, optimized electronic structure and high conductivity, and enhanced mass diffusion rates, the obtained Fe-Ni2P porous nanofibers exhibited high OER activity and robust stability. Theoretical calculations demonstrated that the interaction between Fe-Ni2P and the in-situ formed Fe-NiOOH can optimize the concentration of active intermediates and enhance the electron conductivity, further boosting the OER activity.
    Keywords Nickel phosphide ; Porous nanofiber ; Electrospinning ; Oxygen evolution reaction ; Chemistry ; QD1-999
    Language English
    Publishing date 2022-03-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: The deformation evolution law and stability evaluation of the high-filled slope in the cutting hills to backfill ditches project

    Jun Hu / Wei Yuan / Xiaodong Fu / Zhenping Zhang / Yongqiang Zhou / Shaobo Chai / Yongliang Cheng / Qian Sheng

    Frontiers in Earth Science, Vol

    2023  Volume 11

    Abstract: The cutting hills to back ditches (CHBD) project has been widely implemented since urbanization in hilly areas is steadily rising. The stability of the high-filled slope and the problem of foundation settlement deformation has become one of the vital ... ...

    Abstract The cutting hills to back ditches (CHBD) project has been widely implemented since urbanization in hilly areas is steadily rising. The stability of the high-filled slope and the problem of foundation settlement deformation has become one of the vital issues for safe construction. This paper focused on the deformation evolution law and stability assessment of the high-filled deposit slope composed of the soil-rock mixture (S-RM) in the CHBD project, in Shiyan City, Hubei Province as examples. First, large-scale direct shear tests of S-RM with different rock block proportions (RBPs) under different various normal stresses were carried out, and its mechanical properties were analyzed. Next, the finite element method was used to simulate the processes of the step-by-step filling, and the deformation evolution law was analyzed. Then, the limited equilibrium method (LEM) was used to obtain the potential sliding surfaces and the corresponding safety factors of the high-filled slope, and the safety of the construction was assessed. Finally, automated monitoring of the step-by-step settlement and deep soil deformation was computerized for the typical locations, and the long-term stability of the high-filled slope was studied. The results demonstrate that the first layer of backfill in the F area contains the largest incremental settlement displacement in the y-direction, whereas the value in the G area occurs at the site of the fill layer close to the slope surface at each filling timestep. The displacement response value steadily declines with the increasing filling depth and horizontal displacement, presenting a clear spatial influence range, with the site of maximum incremental displacement as the center. After filling, the safety factors of the potential sliding surface in the F and G areas are 2.531 and 1.118, respectively, and the slope is in a stable state. The monitoring data show that the deformation mostly takes place within 10 m of the surface. The study’s findings are thought to offer technical and practical ...
    Keywords cutting hills to backfill ditches ; high-filled slope ; soil-rock mixture ; deformation ; stability ; monitor ; Science ; Q
    Subject code 550
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Dynamic Security Exchange Scheduling Model for Business Workflow Based on Queuing Theory in Cloud Computing

    Rongbin Xu / Jianguo Wu / Yongliang Cheng / Zhiqiang Liu / Yuanmo Lin / Ying Xie

    Security and Communication Networks, Vol

    2020  Volume 2020

    Abstract: With the rapid development of e-business, large volume of business processes need to be handled in a constrained time. There is always a security issue related to on-time completion in many applications in the economic fields. So, how to effectively ... ...

    Abstract With the rapid development of e-business, large volume of business processes need to be handled in a constrained time. There is always a security issue related to on-time completion in many applications in the economic fields. So, how to effectively manage and organize business processes became very important. By using cloud computing, instance-intensive processes can be handled more effectively by applying just-right virtual machines. Hence, the management of cloud resources became an important issue that many researchers focus on to fully utilize the advantage of cloud. In this paper, we mainly discuss the queuing theory and put forward our novel dynamic process scheduling model based on queuing theory, which is named M/G/k/l-P for business processes. This model can solve the issue of allocating appropriate number of cloud resources based on the number of tasks and execution stages to ensure whether the numbers of cloud resources are sufficient and adequate or not, which can improve the security issue for business process. The service discipline in our model can provide a dynamic process by setting different priorities to improve the experience of users. Evaluations prove that the queuing model of M/G/k/l-P can work very well for business workflow scheduling.
    Keywords Technology (General) ; T1-995 ; Science (General) ; Q1-390
    Subject code 670
    Language English
    Publishing date 2020-01-01T00:00:00Z
    Publisher Hindawi-Wiley
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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