Shenghui Guo’s research while affiliated with Kunming University of Science and Technology and other places

What is this page?


This page lists works of an author who doesn't have a ResearchGate profile or hasn't added the works to their profile yet. It is automatically generated from public (personal) data to further our legitimate goal of comprehensive and accurate scientific recordkeeping. If you are this author and want this page removed, please let us know.

Publications (211)


Waste honeycomb in-situ derived N-doped TiO2 with hierarchical porous nanostructure for rapid and selective H2 detection
  • Article

February 2025

·

4 Reads

Journal of Alloys and Compounds

Hong Li

·

Shenghui Guo

·

Yongjing Guo

·

[...]

·

Ming Hou


Syntheses of CoFeS/Ni/BDD electrode.
(a) SEM images of the original BDD, (b,c) Ni/BDD SEM maps at different magnifications, (d–f) Scanning electron micrographs of CoFeS/Ni/BDD at different magnifications and their (g,h) EDS patterns and analysis of surface element content of CoFeS/Ni/BDD sample.
CoFeS/Ni/BDD electrode prepared with different concentration ratios of cobalt and iron (a) HER performance, (b) OER performance and (c) overpotential line graph atcurrent densities of 10 mA cm− 2 and 50 mA cm− 2.
(a) HER performance, (b) OER performance of the CoFeS/Ni/BDD electrode prepared with 5, 10, 15, and 20 electrodeposition cycles in the range of -0.6 ~ 0.2 V at a scan speed of 5 mV/s and (c) overpotential line graph at 100 mA cm− 2 and 200 mA cm− 2 current densities.
(a) LSV inverse scan curve of each electrode of BDD, Ni/BDD, and CoFeS/Ni/BDD scanned in 1 M KOH solution or alkaline simulated seawater (1 M/3 M) at a scan rate of 5 mV/s. (b) Current Tafel curve when the density is 10 mA cm⁻². (c) EIS curve relative to Hg/HgO when the potential is -1.1 V.

+3

Electrochemical deposition of bimetallic sulfides on novel BDD electrode for bifunctional alkaline seawater electrolysis
  • Article
  • Full-text available

January 2025

·

7 Reads

Seawater electrolysis is an ideal technology for obtaining clean energy—green hydrogen. Developing efficient bifunctional catalysts is crucial for hydrogen production through direct seawater electrolysis. Currently, metal substrates loaded with active catalysts are widely employed as electrodes for seawater electrolysis. However, the challenge of metal corrosion cannot be ignored. In this work, the boron-doped diamond (BDD) with excellent corrosion resistance was explored as a substrate for loading active catalysts in seawater electrolysis. A step-by-step electrodeposition method was used to fabricate the FeCoS/Ni/BDD electrode, effectively addressing the poor adhesion of the FeCoS active layer to the BDD substrate. The resulting electrode demonstrated interesting bifunctional catalytic performance, achieving oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) overpotentials of 425 mV and 360 mV, respectively, in alkaline simulated seawater (1 M KOH and 3.5 wt% NaCl) at a current density of 100 mA cm− 2. Furthermore, by increasing the KOH concentration in the alkaline simulated seawater to 3 M, the OER and HER overpotentials of the electrode significantly decreased to 383 and 300 mV, respectively. This work offers a novel approach for utilizing BDD substrates in the design of corrosion-resistant electrodes for alkaline seawater electrolysis.

Download






Figure 10. SEM images of LiH cross-sections after (a) conventional sintering and (b) microwave sintering.
Structural and operational parameters of the microwave equipment in the microwave heat- ing model of LiH.
Microwave heating simulation results for LiH.
Numerical Simulation and Experimental Analysis for Microwave Sintering Process of Lithium Hydride (LiH)

October 2024

·

32 Reads

Materials

Dense lithium hydride (LiH) is widely used in neutron shielding applications for thermonuclear reactors and space systems due to its unique properties. However, traditional sintering methods often lead to cracking in LiH products. This study investigates the densification sintering of LiH using microwave technology. A multiphysics model was established based on the measured dielectric properties of LiH at different temperatures, allowing for a detailed analysis of the electromagnetic and thermal field distributions during the microwave heating of cylindrical LiH samples. The results indicate that the electric field distribution within the LiH is relatively uniform, with resistive losses concentrated primarily in the LiH region of the microwave cavity. LiH rapidly absorbs microwave energy, reaching the sintering temperature of 520 °C in just 415 s. Additionally, the temperature difference between the low- and high-temperature regions during the sintering process remains below 5 °C, demonstrating excellent uniform heating characteristics. The microwave sintering process enhances interface migration within the LiH samples, resulting in dense metallurgical bonding between grains. In summary, this research provides valuable insights and theoretical support for the rapid densification of LiH materials, highlighting the potential of microwave technology in improving material properties.



Citations (50)


... At standard conditions (298 This approximation, which incorporates both zero-point energy and entropy corrections, is widely adopted and validated by several studies. 52,[57][58][59] Consequently, ∆H H * ads = −0.25 eV, corresponding to ∆G H * = 0 eV has been widely accepted as the condition for the ideal HER catalyst surface. This value is highlighted by the gray dotted lines in several plots presented in this study. ...

Reference:

Activating the Basal Plane of 2D Transition Metal Dichalcogenides via High-Entropy Alloying
Polyacrylonitrile-based 3D N-rich activated porous carbon synergized with Co-doped MoS2 for promoted electrocatalytic hydrogen evolution
  • Citing Article
  • July 2024

Separation and Purification Technology

... However, there are still many unclear aspects in the existing research. It was found that increasing the casting and pulling speed did not significantly improve the chemical composition homogenization of large-scale slab ingots [32]. The main reason is that increasing the pulling speed will significantly increase the depth of the melt pit at the overflow inlet, limit the diffusion of the melt body outward, and easily cause leakage, affecting the solidification microstructure quality of the ingot. ...

Numerical Modeling of Electron Beam Cold Hearth Melting for the Cold Hearth

Minerals

... The researchers attributed the improved performance to factors such as high surface area, the presence of numerous defects, and nickel vacancies. Zhengxin Zhang et al. [34] reported the fabrication of pure and Gd-doped In2O3 nanoparticles using a hydrothermal method, followed by heat treatment at 180 °C for 12 h. The synthesized nanoparticles were investigated for xylene sensing applications in the presence of dry air at various operating temperatures and concentrations of target xylene vapors. ...

Gd-modified In2O3 for the enhanced xylene sensing

Journal of Porous Materials

... Materials with high permittivity, such as wet ores, can concentrate electric fields, thereby influencing the leaching process. This principle is central to the application of microwave technology in mineral processing, as discussed in the paper by Chen [57]. The paper emphasizes the importance of dielectric properties in microwave heating, where materials with high relative permittivity absorb microwave energy more efficiently, leading to rapid and uniform heating. ...

Microwave Treatment of Minerals and Ores: Heating Behaviors, Applications, and Future Directions

Minerals

... Polyacrylonitrile-based carbon fibers occupy a premier position in the field of advanced composites due to their combination of remarkable mechanical properties, such as high specific strength and modulus, low density, and corrosion resistance, which offer unrivaled advantages over other materials [10][11][12][13]. Generally, the conversion of PAN-based precursors into carbon fibers involves oxidative stabilization in an air atmosphere and carbonization in an inert atmosphere [12,[14][15][16][17], in which the thermal oxidative stabilization process, as an organic-inorganic transition stage, plays an important role in determining the mechanical properties and microstructure of the final carbon fibers. ...

Interaction between thermal stabilization temperature program, oxidation reaction, and mechanical properties of polyacrylonitrile (PAN) based carbon fibers
  • Citing Article
  • January 2024

Diamond and Related Materials

... Low-dimensional nanomaterials for EM function contain different dimensions (zero-dimensional (0D), quasi-onedimensional (Q1D), one-dimensional (1D), and two-dimensional (2D) nanofillers) [17][18][19]. The ingenious combination of these different dimensions known as heterodimensional structures will exhibit novel physical properties (containing nanostructure, conductive network distribution, EM response, etc.) beyond those of the parent material at the nano/micro/macroscale [20]. ...

Synthesis of CuCo2S4@Expanded Graphite with crystal/amorphous heterointerface and defects for electromagnetic wave absorption

... 6,7 The electrode material used in SCs has a significant impact on their performance, influencing characteristics such as charge storage capacity and conductivity. 8 Indicating that the right electrode materials are critical for collecting and discharging electrical energy with maximum efficiency and dependability. The selection of the appropriate materials is critical for improving overall SC performance in a variety of applications. ...

Fabrication of 1.6 V asymmetric supercapacitor in an aqueous electrolyte using a CuO-SnO2 composite and activated carbon electrodes
  • Citing Article
  • August 2023

Materials Today Communications

... Table 3 provides all the curing-related material properties along with their range and step in the design space. In this study, according to Equation (2), the autocatalytic cure kinetic equation is used, as it is widely used in cure prediction studies [23,25,44,45]: ...

Cure Kinetics of a Carbon Fiber/Epoxy Prepreg by Dynamic Differential Scanning Calorimetry

... It is confirmed that the MoS2/Pt surface lowers the activation energy to convert CO to CO2 via the free radicals (·O 2and · OH) induced by the synergy of photochemical effects and water vapor. 96 ...

Enhanced Free–Radical Generation on MoS2/Pt by Light and Water Vapor Co‐Activation for Selective CO Detection with High Sensitivity

... Transition metals such as Ni, Fe, and Co can also serve as active metals in plastic pyrolysis. [31] This study investigated the influence of different metals on microwave-assisted catalytic pyrolysis. FeO x was selected as the base material owing to its superior performance as a monometallic catalyst. ...

Enhanced microwave absorption capacity of iron-based catalysts by introducing Co and Ni for microwave pyrolysis of waste COVID-19 Masks
  • Citing Article
  • May 2023

Fuel