Advanced electrocatalysts with unusual active sites for electrochemical water splitting

InfoMat, Journal Year: 2023, Volume and Issue: 6(1)

Published: Nov. 27, 2023

Abstract Electrochemical water splitting represents a promising technology for green hydrogen production. To design advanced electrocatalysts, it is crucial to identify their active sites and interpret the relationship between structures performance. Materials extensively studied as electrocatalysts include noble‐metal‐based (e.g., Ru, Ir, Pt) non‐noble‐metal‐based 3d transition metals) compounds. Recently, advancements in characterization techniques theoretical calculations have revealed novel unusual sites. The present review highlights latest achievements discovery identification of various unconventional electrochemical splitting, with focus on state‐of‐the‐art strategies determining true establishing structure–activity relationships. Furthermore, we discuss remaining challenges future perspectives development next‐generation By presenting fresh perspective reaction involved this aims provide valuable guidance study industrial applications. image

Language: Английский

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Electrochemical Oxidation of Small Molecules for Energy‐Saving Hydrogen Production

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(30)

Published: May 27, 2024

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

Language: Английский

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Seven mechanisms of oxygen evolution reaction proposed recently: A mini review

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 485, P. 149992 - 149992

Published: Feb. 25, 2024

Language: Английский

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FeCoCuMnRuB Nanobox with Dual Driving of High-Entropy and Electron-Trap Effects as the Efficient Electrocatalyst for Water Oxidation

Nano Letters, Journal Year: 2024, Volume and Issue: 24(9), P. 2831 - 2838

Published: Feb. 22, 2024

High-entropy borides hold potential as electrocatalysts for water oxidation. However, the synthesis of tailored nanostructures remains a challenge due to thermodynamic immiscibility polymetallic components. Herein, FeCoCuMnRuB nanobox decorated with nanosheet array was synthesized first time by "coordination-etch-reduction" method. The has various structural characteristics express catalytic performance; meanwhile, it combines high-entropy effect multiple components electron trap induced electron-deficient B, synergistically regulating its electronic structure. As result, exhibits enhanced OER activity low overpotential (η10 = 233 mV), high TOF value (0.0539 s–1), small Tafel slope (61 mV/dec), and satisfactory stability 200 h, outperforming alloy low-entropy borides. This work develops entropy B-driven strategy motivating performance oxidation, which broadens diversity category materials.

Language: Английский

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Constructing micro-nano rod-shaped iron-molybdenum oxide heterojunctions to enhance overall water electrolysis

Materials Today Chemistry, Journal Year: 2024, Volume and Issue: 36, P. 101934 - 101934

Published: Feb. 1, 2024

Language: Английский

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Perovskite oxides as electrocatalysts for water electrolysis: From crystalline to amorphous

Carbon Energy, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 2, 2024

Abstract Crystalline perovskite oxides are regarded as promising electrocatalysts for water electrolysis, particularly anodic oxygen evolution reactions, owing to their low cost and high intrinsic activity. Perovskite with noncrystalline or amorphous characteristics also exhibit electrocatalytic performance toward electrochemical splitting. In this review, a fundamental understanding of the advantages crystalline, noncrystalline, is presented. Subsequently, recent progress in development advanced electrolysis by engineering breaking crystallinity reviewed, special focus on underlying structure–activity relationships. Finally, remaining challenges unsolved issues presented, an outlook briefly proposed future exploration next‐generation water‐splitting based oxides.

Language: Английский

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Research Progress of High-Entropy Oxides as Oxygen Evolution Reaction Catalysts

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(8), P. 6659 - 6678

Published: April 2, 2024

Equimolar or nearly molar mixtures of five more metals are used to create high-entropy oxides (HEOs). HEOs also possess the kinetic slow diffusion effect, structural lattice distortion, thermodynamic and cocktail effect. Consequently, a growing number scientists investigating oxides. High active site density, low overpotential, entropic stabilization effects main reasons why now show good electrocatalytic oxygen evolution reaction. However, complexity elemental composition, organization, surface morphology limits use HEOs. The development mechanisms behind OER reviewed in this work, along with description response pathways evaluation standards. performance diverse organizational structures is research because come variety kinds. Additionally, when utilized as carriers, trend examined. Lastly, potential future problems opportunities for HEO electrocatalysts discussed.

Language: Английский

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Lattice Strain and Charge Redistribution of Pt Cluster/Ir Metallene Heterostructure for Ethylene Glycol to Glycolic Acid Conversion Coupled with Hydrogen Production

Small, Journal Year: 2023, Volume and Issue: 20(1)

Published: Aug. 30, 2023

Abstract Upgrading overall water splitting (OWS) system and developing high‐performance electrocatalysts is an attractive way to the improve efficiency reduce consumption of hydrogen (H 2 ) production from electrolyzed water. Here, a Pt cluster/Ir metallene heterojunction structure (Pt/Ir hetero‐metallene) with unique Pt/Ir interface reported for conversion ethylene glycol (EG) glycolic acid (GA) coupled H production. With assistance oxidation (EGOR), Pt/Ir||Pt/Ir hetero‐metallene two‐electrode electrolysis exhibits lower cell voltage 0.36 V at 10 mA cm −2 . Furthermore, Faradaic EG GA as high 87%. The excellent performance this new heterostructure arise charge redistribution strain effects induced by Pt–Ir interactions between heterogeneous interfaces, well larger specific surface area more active sites due structure.

Language: Английский

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V-doping and cation-vacancy engineering synergistically promote the electrocatalysis ability of NiFe-layered double hydroxides towards the oxygen evolution and urea oxidation reactions

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 493, P. 152860 - 152860

Published: June 5, 2024

Language: Английский

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Modulating nanostructure and electronic structure of P and W co-doped carbon encapsulated heterovalent NiCo composite for accelerating urea oxidation reaction

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 484, P. 149561 - 149561

Published: Feb. 12, 2024

Language: Английский

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