Nanostructured electrocatalysts for low-temperature water splitting: A review

Aykut, Yasemin; Bayrakçeken Yurtcan, Ayşe

doi:10.1016/j.electacta.2023.143335

Cited by 15 publications

(2 citation statements)

References 401 publications

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“…The current density gradually declines during the 12 h to the end of the test, and it finally reaches 136 mA cm −2 @−1.710 V. The decrease in current density indicates the decrease in HER efficiency of the Ni cathode, which might be attributed to the change in catalytic substance and morphology during square-wave testing. In addition, the fluctuating voltage changes the surface morphology of the catalyst and leads to a change in the electrochemically active surface area [37]. The current density variation trends of Ni cathodes powered by step-and triangle-wave power are similar to that of square voltage.…”

Section: Introductionmentioning

confidence: 89%

Influence of Power Fluctuation on Ni-Based Electrode Degradation and Hydrogen Evolution Reaction Performance in Alkaline Water Splitting: Probing the Effect of Renewable Energy on Water Electrolysis

Liu,

Lin,

Zhang

et al. 2024

Catalysts

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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.

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Section: Introductionmentioning

confidence: 89%

Influence of Power Fluctuation on Ni-Based Electrode Degradation and Hydrogen Evolution Reaction Performance in Alkaline Water Splitting: Probing the Effect of Renewable Energy on Water Electrolysis

Liu,

Lin,

Zhang

et al. 2024

Catalysts

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“…Despite their potential, challenges persist, notably in harnessing visible light effectively and optimizing electron-hole transfer rates, impeding their widespread adoption for large-scale hydrogen production. Similarly, electrocatalytic methods for hydrogen production, while efficient, face drawbacks such as energy consumption and the production of economically less viable by-products, hindering their extensive development [9][10][11][12][13]. However, Materials 2024, 17, 1463 2 of 14 a promising alternative in the realm of catalysis is mechanical catalysis.…”

Section: Introductionmentioning

confidence: 99%

Harvesting Vibration Energy for Efficient Cocatalyst-Free Sonocatalytic H2 Production over Magnetically Separable Ultra-Low-Cost Fe3O4

Zhang,

Sun,

et al. 2024

Materials

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The cavitation effect is an important geochemical phenomenon, which generally exists under strong hydrodynamic conditions. Therefore, developing an economical and effective sonocatalyst becomes a vital method in capitalizing on the cavitation effect for energy generation. In this study, we first report a novel Fe3O4 sonocatalyst that can be easily separated using a magnetic field and does not require any additional cocatalysts for H2 production from H2O. When subjected to ultrasonic vibration, this catalyst achieves an impressive H2 production rate of up to 175 μmol/h/USD (where USD stands for dollars), surpassing most previously reported mechanical catalytic materials. Furthermore, the ease and efficiency of separating this catalyst using an external magnetic field, coupled with its effortless recovery, highlight its significant potential for practical applications. By addressing the key limitations of conventional sonocatalysts, our study not only demonstrates the feasibility of using Fe3O4 as a highly efficient sonocatalyst but also showcases the exciting possibility of using a new class of magnetically separable sonocatalysts to productively transform mechanical energy into chemical energy.

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RuO2/FeCo2O4 as an efficient oxygen evolution reaction catalyst in alkaline medium

Li,

Gu,

et al. 2024

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Nanostructured electrocatalysts for low-temperature water splitting: A review

Cited by 15 publications

References 401 publications

Influence of Power Fluctuation on Ni-Based Electrode Degradation and Hydrogen Evolution Reaction Performance in Alkaline Water Splitting: Probing the Effect of Renewable Energy on Water Electrolysis

Influence of Power Fluctuation on Ni-Based Electrode Degradation and Hydrogen Evolution Reaction Performance in Alkaline Water Splitting: Probing the Effect of Renewable Energy on Water Electrolysis

Harvesting Vibration Energy for Efficient Cocatalyst-Free Sonocatalytic H2 Production over Magnetically Separable Ultra-Low-Cost Fe3O4

RuO2/FeCo2O4 as an efficient oxygen evolution reaction catalyst in alkaline medium

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