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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Constructing Ru‐O‐TM Bridge in NiFe‐LDH Enables High Current Hydrazine‐assisted H₂ Production

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(30)

Published: May 9, 2024

Hydrazine oxidation-assisted water splitting is a critical technology to tackle the high energy consumption in large-scale H

Language: Английский

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O‐2p Hybridization Enhanced Transformation of Active γ‐NiOOH by Chromium Doping for Efficient Urea Oxidation Reaction

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(36)

Published: May 6, 2024

Abstract The electrooxidation of urea holds great potential for converting from wastewater into hydrogen, contributing to environmental protection and sustainable energy production. This necessitates the development highly efficient stable catalysts oxidation reaction (UOR). In this study, a NiCoCr‐LDH/NF (nickel‐cobalt‐chromium layered double hydroxide/nickel foam) electrode is successfully synthesized via simple hydrothermal method, demonstrating excellent electrocatalytic performance with low work 1.38 V at high current density 100 mA cm −2 . situ, Raman spectra analysis revealed that incorporation chromium (Cr) facilitated generation active γ‐NiOOH species catalyst reconstruction. Density functional theory (DFT) simulations confirmed lower formation due weakened interaction O─H bonds because narrow range hybridization between O‐2p z orbitals H‐1s orbitals. introduction Cr also improved adsorption molecules its intermediates, thereby enhancing overall activity UOR. With performance, unique electronic states, coordination structures, showcases practical applications in field catalysis.

Language: Английский

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Iron Molybdenum Sulfide‐Supported Ultrafine Ru Nanoclusters for Robust Sulfion Degradation‐Assisted Hydrogen Production

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(27)

Published: March 5, 2024

Abstract Electrocatalytic hydrogen evolution and (S 2− ) recycling present promising strategies for cost‐effective production simultaneous removal of environmental pollutants. However, the advancement this technology is hindered by limited availability affordable, efficient, stable catalysts. Herein, study synthesizes ultrafine ruthenium (Ru) nanoclusters on a substrate iron molybdenum sulfide (FeMo‐S) nanosheets, creating new heterointerface catalyst (FeMo‐S/Ru) reaction (HER) sulfion oxidation (SOR). Experimental theoretical calculations suggest that strong electron interactions between Ru FeMo‐S substrate, optimizing *H adsorption promoting HER activity one side while facilitating sulfur intermediates other side, effectively catalyzing SOR. Additionally, assembled electrocatalytic coupling system with FeMo‐S/Ru displays an ultralow cell voltage 0.57 V at 100 mA cm −2 , achieving high Faradaic efficiencies (>96%) H 2 production, also exhibiting remarkable durability over 1 month (838 h). This work paves way development highly efficient durable supported catalysts, enabling energy‐saving environmentally friendly recycling.

Language: Английский

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Controlled synthesis of M-MnS/Ni3S2（M=Zr, Ce, Bi and V）nanoarrays on nickel foam for overall urea splitting

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 88, P. 313 - 321

Published: Sept. 20, 2024

Language: Английский

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Regulating Reconstruction‐Engineered Active Sites for Accelerated Electrocatalytic Conversion of Urea

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(36)

Published: June 14, 2024

Reconstruction-engineered electrocatalysts with enriched high active Ni species for urea oxidation reaction (UOR) have recently become promising candidates energy conversion. However, to inhibit the over-oxidation of brought by valence state Ni, tremendous efforts are devoted obtaining low-value products nitrogen gas avoid toxic nitrite formation, undesirably causing inefficient utilization cycle. Herein, we proposed a mediation engineering strategy significantly boost high-value formation help close loop employment economy. Specifically, platinum-loaded nickel phosphides (Pt-Ni

Language: Английский

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Nickel Hydroxide‐Based Electrocatalysts for Promising Electrochemical Oxidation Reactions: Beyond Water Oxidation

Small, Journal Year: 2024, Volume and Issue: 20(33)

Published: March 20, 2024

Transition metal hydroxides have attracted significant research interest for their energy storage and conversion technique applications. In particular, nickel hydroxide (Ni(OH)

Language: Английский

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Room-temperature sulfur doped NiMoO4 with enhanced conductivity and catalytic activity for efficient hydrogen evolution reaction in alkaline media

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 664, P. 469 - 477

Published: March 12, 2024

Language: Английский

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Vertical Cross‐Alignments of 2D Semiconductors with Steered Internal Electric Field for Urea Electrooxidation via Balancing Intermediates Adsorption

Small, Journal Year: 2024, Volume and Issue: 20(34)

Published: April 10, 2024

Abstract Single‐component electrocatalysts generally lead to unbalanced adsorption of OH − and urea during oxidation reaction (UOR), thus obtaining low activity selectivity especially when oxygen evolution (OER) competes at high potentials (>1.5 V). Herein, a cross‐alignment strategy in situ vertically growing Ni(OH) 2 nanosheets on 2D semiconductor g‐C 3 N 4 is reported form hetero‐structured electrocatalyst. Various spectroscopy measurements including experiments indicate the existence enhanced internal electric field interfaces vertical nanosheets, favorable for balancing intermediates. This heterojunction electrocatalyst shows high‐selectivity UOR compared pure , even V) large current density. The computational results show could steer increase urea, efficiently avoiding poisoning strongly adsorbed active sites. A membrane electrode assembly (MEA)‐based electrolyzer with anode operate an industrial‐level density 200 mA cm −2 . work paves avenue designing high‐performance by cross‐alignments components.

Language: Английский

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Synergistic modulation of the d-band center in Ni3S2 by selenium and iron for enhanced oxygen evolution reaction (OER) and urea oxidation reaction (UOR)

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 671, P. 46 - 55

Published: May 21, 2024

Language: Английский

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