Recent advances in hybrid water electrolysis for energy-saving hydrogen production

Li, Di; Tu, Jibing; Lü, Yingying; Zhang, Bing

doi:10.1016/j.gce.2022.11.001

Cited by 9 publications

(3 citation statements)

References 95 publications

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“…[1][2][3][4] Among the many methods of hydrogen production, use of electrolytic water is the most environmentally friendly and promising one. [5][6][7][8][9] The preparation of high-efficiency catalysts is a key step to improve the reaction rate of hydrogen evolution and reduce energy consumption. [10][11][12] Hydrogen evolution from electrolyzed water requires multiple steps.…”

Section: Introductionmentioning

confidence: 99%

“…Hydrogen energy has become a hot new energy source due to its high energy density, abundant raw materials, and environmentally friendly products during consumption 1–4 . Among the many methods of hydrogen production, use of electrolytic water is the most environmentally friendly and promising one 5–9 . The preparation of high‐efficiency catalysts is a key step to improve the reaction rate of hydrogen evolution and reduce energy consumption 10–12 .…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Cu(OH)₂/Cu₂S arrays for enhanced hydrogen evolution reaction

Xu,

Qiao,

Liu

et al. 2024

Battery Energy

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Cu(OH)2 has the advantages of ease of structural regulation, good conductivity, and relatively low cost, making it a suitable candidate material for use as an electrocatalyst. However, its catalytic efficiency and stability still need to be improved further. Therefore, Cu(OH)2/Cu2S was successfully prepared on copper foam (CF) using the in situ growth and hydrothermal method. The structural characterization showed that sulfidation treatment induced transformation of Cu(OH)2/CF from smooth nanorods into a coral‐like structure, which exposed more active sites of Cu(OH)2/Cu2S and enhanced the performance of electrocatalytic hydrogen evolution reaction (HER). Compared with Cu(OH)2, Cu(OH)2/Cu2S showed better alkaline HER performance, especially when the vulcanization concentration was 0.1 M, the overpotential of Cu(OH)2/Cu2S was 174 mV, and the reaction kinetics was 64 mv dec−1 at a current density of 10 mA cm−2. In this work, the morphology and electronic structure of copper‐based metal sulfide electrocatalysts were adjusted by sulfide treatment, which provided a new reference for improving HER performance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of Cu(OH)₂/Cu₂S arrays for enhanced hydrogen evolution reaction

Xu,

Qiao,

Liu

et al. 2024

Battery Energy

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“…[9][10][11] Hence, the urea oxidation reaction (UOR) has an evident ability as a primary participant for feasible electrochemical energy conversion strategy and serves simultaneous urea degradation in water resources. In other aspects, UOR with a six electron transfer process with a theoretical cell potential of 0.37 V exhibits more negative potential than that of OER [12][13][14] hence making UOR an efficient reaction to replace sluggish OER. This impacts water splitting overall, creating an effective alternative for water electrolysis in the hydrogen production approach.…”

Section: Introductionmentioning

confidence: 99%

Anchoring Polydopamine on ZnCo₂O₄ Nanowire To Facilitate Urea Water Electrolysis

Bhanuse

Kumar

2023

Chemistry A European J

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Dealing with overcoming the sluggishness of the oxygen evolution reaction (OER), the urea oxidation reaction (UOR) existed. ZnCo2O4, an excellent OER electrocatalyst, its application towards UOR is studied with surface‐grown polydopamine (PDA). ZnCo2O4@PDA is produced over the surface of nickel foam by hydrothermal method followed by self‐polymerization of dopamine hydrochloride. Dopamine hydrochloride was varied in solution mixture to study the optimal growth of PDA necessary to enhance electrochemical activity. Hence, prepared ZnCo2O4@PDA is characterized by X‐ray diffraction, electronic structural, and morphology/microstructure studies for confirmation. With successful confirmation, the developed electrode material is applied towards UOR and ZnCo2O4@ PDA‐1.5, delivering an excellent low overpotential of 80 mV @ 20 mA/cm2 in the electrolyte mixture of 1 M potassium hydroxide + 0.33 M urea. Also, to support excellent UOR activity, other electrochemical properties such as tafel slope, electrochemical surface active sites, and electrochemical impedance spectroscopy are studied. Further, a schematic illustration explaining the UOR mechanism is shown to clearly understand the obtained electrochemical activity. Finally, urea water electrolysis is carried out in a two‐electrode symmetrical cell and compared with water electrolysis. This clearly shows the potential of the developed material for efficient electrochemical hydrogen production.

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Electrochemical Oxidation of Small Molecules for Energy‐Saving Hydrogen Production

Sun,

Xu,

Fei

et al. 2024

Advanced Energy Materials

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Electrochemical water splitting is a promising technique for the production of high‐purity hydrogen. Substituting the slow anodic oxygen evolution reaction with an oxidation reaction that is thermodynamically more favorable enables the energy‐efficient production of hydrogen. Moreover, this approach facilitates the degradation of environmental pollutants and synthesis of value‐added chemicals through the rational selection of small molecules as substrates. Strategies for small‐molecule selection and electrocatalyst design are critical to electrocatalytic performance, with a focus on achieving a high current density, selectivity, Faradaic efficiency, and operational durability. This perspective discusses the key factors required for further advancement, including technoeconomic analysis, new reactor system design, meeting the requirements of industrial applications, bridging the gap between fundamental research and practical applications, and product detection and separation. This perspective aims to advance the development of hybrid water electrolysis applications.

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Recent advances in hybrid water electrolysis for energy-saving hydrogen production

Cited by 9 publications

References 95 publications

Preparation of Cu(OH)₂/Cu₂S arrays for enhanced hydrogen evolution reaction

Preparation of Cu(OH)₂/Cu₂S arrays for enhanced hydrogen evolution reaction

Anchoring Polydopamine on ZnCo₂O₄ Nanowire To Facilitate Urea Water Electrolysis

Electrochemical Oxidation of Small Molecules for Energy‐Saving Hydrogen Production

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Recent advances in hybrid water electrolysis for energy-saving hydrogen production

Cited by 9 publications

References 95 publications

Preparation of Cu(OH)2/Cu2S arrays for enhanced hydrogen evolution reaction

Preparation of Cu(OH)2/Cu2S arrays for enhanced hydrogen evolution reaction

Anchoring Polydopamine on ZnCo2O4 Nanowire To Facilitate Urea Water Electrolysis

Electrochemical Oxidation of Small Molecules for Energy‐Saving Hydrogen Production

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Product

Resources

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Preparation of Cu(OH)₂/Cu₂S arrays for enhanced hydrogen evolution reaction

Preparation of Cu(OH)₂/Cu₂S arrays for enhanced hydrogen evolution reaction

Anchoring Polydopamine on ZnCo₂O₄ Nanowire To Facilitate Urea Water Electrolysis