June 2024
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7 Reads
Surface and Coatings Technology
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June 2024
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7 Reads
Surface and Coatings Technology
June 2024
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3 Reads
Corrosion Science
May 2024
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25 Reads
Catalysts
The combination of water electrolysis and renewable energy to produce hydrogen is a promising way to solve the climate and energy crisis. However, the fluctuating characteristics of renewable energy not only present a significant challenge to the use of water electrolysis electrodes, but also limit the development of the hydrogen production industry. In this study, the effects of three different types of waveforms (square, step, and triangle, which were used to simulate the power input of renewable energy) on the electrochemical catalysis behavior of Ni plate cathodes for HER was investigated. During the test, the HER performance of the Ni cathode increased at first and then slightly decreased. The fluctuating power led to the degradation of the Ni cathode surface, which enhanced the catalysis effect by increasing the catalytic area and the active sites. However, prolonged operation under power fluctuations could have damaged the morphology of the electrode surface and the substances comprising this surface, potentially resulting in a decline in catalytic efficiency. In addition, the electrochemical catalysis behavior of the prepared FeNiMo-LDH@NiMo/SS cathode when subjected to square-wave potential with different fluctuation amplitudes was also extensively studied. A larger amplitude of fluctuating power led to a change in the overpotential and stability of the LDH electrode, which accelerated the degradation of the cathode. This research provides a technological basis for the coupling of water electrolysis and fluctuating renewable energy and thus offers assistance to the development of the “green hydrogen” industry.
April 2024
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18 Reads
International Journal of Hydrogen Energy
April 2024
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15 Reads
Corrosion Science
February 2024
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21 Reads
Electrochimica Acta
February 2024
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15 Reads
Corrosion Communications
January 2024
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2 Reads
December 2023
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21 Reads
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1 Citation
Journal of Alloys and Compounds
June 2023
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63 Reads
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2 Citations
Molecules
Hydrogen sulfide (H2S) is widely found in oil and natural gas wells and industrial wastewater tanks. Owing to its high toxicity, the monitoring and detection of H2S in the air is essential. However, recent techniques for the quantitative detection of H2S gas suffer from limitations such as high cost, complicated operation, and insufficient sensitivity, preventing their practical application in industry. Thus, we have developed a portable test paper for real-time and inexpensive monitoring of H2S gas by color changes. The test paper had a significantly low H2S detection limit of 200 ppb, which is considered safe for humans. Moreover, the color of the test paper did not change noticeably when exposed to CO2, N2, O2, and air environments, indicating that the test paper is selective for H2S gas and can be stored for a long time. In addition, we fitted a color difference linear model between the color difference values (ΔE) and the concentrations of H2S gas. The establishment of the linear model substantiates that the test paper can provide accurate intensity information when detecting H2S gas leakage.
... Hydrogen sulfide (H 2 S) is a noxious gas that smells like rotten eggs [1][2][3]. Even exposure to a low concentration of H 2 S can cause serious harmful effects, including damage to the respiratory and central nervous systems [4,5]. ...
June 2023
Molecules
... Furthermore, the electrode showed a high durability at 500 mA cm −2 for over 100 h in 1 mol L −1 KOH electrolyte. In another study, our research group developed a Ni-based water-splitting self-supported electrode, FeNi-LDH@Ni/SS, with excellent HER and OER performance [23]. The large-scale electrode that we prepared (10 cm × 10 cm) passed 3000 cycles of CV testing and a 100 h 100 mA cm −2 stability test, and it showed potential increases of only 18 mV and 21.98 mV, respectively. ...
April 2023
Surface and Coatings Technology
... Catalysts are a key factor in the hydrogen production industry's efficiency and economy. Focusing on the reductive side of water splitting, many catalysts for the hydrogen evolution reaction (HER) have been well investigated from various perspectives [9][10][11]. The purpose of catalyst design is to decrease the reaction energy and improve the reaction kinetics. ...
April 2023
International Journal of Hydrogen Energy
... In order to model the particles' interactions with each other, many researchers use software such as Abaqus v6.4 to model the particles [24,25]. This method can better reflect the collision of the particles when the number of particles is only a few or dozens, but in the whole cold spraying process, the number of sprayed particles can reach at least hundreds of thousands. ...
February 2023
Materials
... Enhanced corrosion resistance for coated surfaces may be related to the hydrogel layers' ability to protect the substrate both physically and chemically [60,61]. As seen in Table S1, Alg/OCP-coated Ti groups have nobler E corr , lower I corr , and higher R p than Alg-coated samples in all simulated biological media. ...
January 2023
Molecules
... The obtained XPS data were processed using Advantage software. The chemical compositions on the surfaces of the electrodes were calculated using the convolution method with a sensitivity factor [73]. Equation (4) was used to calculate the composition (at%, Cx)) of the relative contents: ...
November 2022
Corrosion Science
... In the previous study, the detection limit of the response film containing only anthocyanin was 10 ppm [20]. In contrast, the composite test paper (coated with 0.5 wt.% SbCl3 and 4 wt.% ...
February 2022
Progress in Organic Coatings
... The necessary conditions for achieving self-healing are the input and conversion of external energy, mainly including electrothermal conversion, photothermal conversion, and magnetothermal response. [7][8][9][10][11] Electromagnetic waves have high permeability to polymers, which is instrumental in improving the depth and efficiency of healing. So the magnetothermal conversion is more advantageous than the other two in terms of energy supply for intrinsic self-healing materials. ...
August 2021
Surface and Coatings Technology
... Our previous study has reported a recyclable ethyl cellulose-based thermoplastic gel coating with good corrosion resistance, and it has stable physical and chemical properties after 10 times reutilization [33]. In this work, Fe 3 O 4 nanoparticles with high-efficiency magnetocaloric effect was synthesized by precipitation method, and a novel composite coating with excellent corrosion resistance and intrinsic self-healing performance was developed based on ethyl cellulose supramolecular gel. ...
September 2019
Coatings