Unveiling the Role of Boron on Nickel‐Based Catalyst for Efficient Urea Oxidation Assisted Hydrogen Production

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 15, 2024

Abstract Urea oxidation reaction (UOR) is an ideal alternative to oxygen evolution (OER) for efficient hydrogen production but immensely plagued by slow kinetics. Herein, a multilayer hole amorphous boron‐nickel catalyst (a‐NiB x ) fabricated through simple chemical plating method, which displays intriguing catalytic activity toward UOR, demanding low working potential of 1.4 V reach 100 mA cm −2 . The high performance credited the formation metaborate (BO 2 − ), can promote high‐oxidation‐state NiOOH active phase and optimize adsorption urea molecules. This be confirmed operando spectroscopy characteristics density functional theory calculations. Consequently, assembled electrolyzer utilizing NiB as bifunctional catalysts exhibited splendid activity, requiring evidently lower voltage 1.66 current 1.57 when using Pt/C cathode catalyst. Moreover, secured robust stability over 200 h, well four times higher rate than traditional water electrolysis.

Language: Английский

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Hydroxyl‐Binding Induced Hydrogen Bond Network Connectivity on Ru‐based Catalysts for Efficient Alkaline Hydrogen Oxidation Electrocatalysis

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 25, 2024

Abstract Understanding the role of adsorbed intermediates at polarized catalyst‐electrolyte interface on structure electrical double layer (EDL) is essential for developing highly efficient electrocatalysts. Here, we prepared a series unconventional face‐centered‐cubic ( fcc ) phase Ru‐based catalysts (i.e. ‐Ru, ‐RuCr, and ‐RuCrW) by rational tuning binding energetics hydroxyl intermediate to engineer electrochemical boost performance alkaline hydrogen oxidation reaction (HOR). The introduction oxyphilic metals Cr W can regulate orbital occupation Ru, promote adsorption species, resulting in an anomalous behavior that HOR under media exceeds acidic media. Experimental results theoretical calculations unravel modulated species electrode surface are responsible reconstruction interfacial water dynamic evolution free molecules from nearest above gap region EDL, thereby leading significantly increased connectivity bond network. Our work reveals new understanding controlling process bonding network electrocatalysis, will guide design advanced electrocatalysts through engineering.

Language: Английский

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Operando elucidation of hydrogen production mechanisms on sub-nanometric high-entropy metallenes

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Nov. 25, 2024

Precise morphological control and identification of structure-property relationships pose formidable challenges for high-entropy alloys, severely limiting their rational design application in multistep tandem reactions. Herein, we report the synthesis sub-nanometric metallenes with up to eight metallic elements via a one-pot wet-chemical approach. The PdRhMoFeMn exhibit high electrocatalytic hydrogen evolution performances 6, 23, 26 mV overpotentials at -10 mA cm

Language: Английский

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Vertically aligned ReS2 on MOF deorived CoS2–C hybrid as core-shell catalyst for promoting overall water splitting

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 72, P. 307 - 314

Published: May 29, 2024

Language: Английский

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Revitalizing osmium-based catalysts for energy conversion

Energy Reviews, Journal Year: 2023, Volume and Issue: 2(4), P. 100053 - 100053

Published: Oct. 25, 2023

Designing high cost-effective catalysts has been one of the core topics in energy conversion and storage. Due to unique electronic structure excellent comprehensive properties, Pt-group metal (PGM) based-materials occupy top region numerous volcanic curves are currently difficult be replaced by abundant transition catalysts. Herein, we pay attention osmium (Os), as cheapest least noticed PGM field electrocatalysis, with promising application prospects. Specifically, three main modification strategies (anion modulation, heterostructure construction, substrate engineering) Os-based hydrogen evolution reaction (HER), structural advantages provided oxygen (OER), other energy-related electrocatalysis applications discussed one. In addition, discuss key problems countermeasures faced their further breakthroughs, look forward future development trends Undoubtedly, insights this work will promote understanding designation

Language: Английский

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Nanomaterials for sustainable water splitting towards green hydrogen production

International Journal of Green Energy, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 26

Published: Jan. 2, 2025

This work encapsulates recent research and advancements in the realm of green hydrogen production through water splitting, a pivotal pathway for sustainable clean energy. As global community seeks alternatives to conventional fossil fuels, emerges as promising energy carrier, particularly when derived from renewable resources. paper reviews state-of-the-art technologies, focusing on both electrochemical photoelectrochemical methods employed splitting. Electrochemical approaches, encompassing proton exchange membrane alkaline electrolyzers, are analyzing their efficiency, cost-effectiveness, durability. Catalyst development integration explored enhance kinetics oxygen evolution reactions, crucial optimizing overall system performance. In context utilization semiconductor-based material takes center stages. Advanced engineering, device architecture, interface design is discussed maximize photoconversion efficiency. Tandem cells integrated simultaneous investigated potential elevate efficiency levels. A critical aspect review sources, such solar wind, power-water-splitting processes, ensuring environmentally friendly pathway. Economic consideration environmental impact assessments outlined, shedding light feasibility scalability production. Emphasizing its role achieving future.

Language: Английский

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Controllable Detachment of Organic Ligands on Ultrathin Amorphous Nanosheets Tailors the Electron‐Aggregation for Accelerated pH‐Universal Hydrogen Reaction

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 2, 2025

Tailoring the local environment of catalyst surface has emerged as an effective strategy to enhance reaction kinetics involving multiple intermediates. For hydrogen evolution reactions (HER), driving factors for aggregation and migration which are poorly understood in depth affects especially over a wide pH range. Inspired by selectivity microenvironment intermediates, interfacial electrocatalyst composed Ru ultrafine nanocatalysts anchored onto monolayer amorphous (a-WCoNiO) nanosheets with electron-rich induced organic oleylamine ligand is designed realize high-performance pH-universal HER. This Ru/a-WCoNiO possesses impressively low overpotentials -13, -14, -14 mV at 10 mA cm-2 0.5 m H2SO4, 1 KOH PBS, respectively, ranking among best HER catalysts reported date. Benefiting from microenvironment, exhibits record-high turnover frequency (TOF) mass activity (MA), more than 47.9 times higher that commercial 20% Pt/C. Importantly, other precious metals loaded on a-WCoNiO enhancing their current density It believed this developed approach modifiers tailored practical significance advantages designing catalysts.

Language: Английский

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Modulating Electronic Structure and Mass Transfer Kinetics via Mo‐Mo₂C Heterostructure for Ampere‐Level Hydrogen Evolution

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 25, 2025

Abstract Molybdenum carbide (Mo 2 C), known for its platinum‐like electronic structure and excellent corrosion resistance, has demonstrated promising catalytic performance in laboratory tests. However, under industrial harsh conditions, the of Mo C faces constraints due to inherently strong hydrogen adsorption. Additionally, at elevated current densities, rapid depletion active species electrolyte, coupled with gas bubble accumulation, introduce significant mass transport challenges. This work introduces an electrode Mo‐Mo heterostructures supported on a plate (Mo‐Mo C/Mo). Further analyses reveal that incorporating metallic into optimizes C. optimization achieves more balanced adsorption, while also enhancing capacity water adsorption dissociation C, collectively improving activity. Furthermore, this features unique “bush‐like” surface morphology can induce “turbulence” effect electrolyte near surface, facilitating flow transport. As result, C/Mo exhibits high densities (η 1000 = 452 mV). Moreover, resistance robust integration ensure long‐term stability, remaining stable 1.5 A 6 M KOH over extended periods.

Language: Английский

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Metal Nitride Catalysts for Photoelectrochemical and Electrochemical Catalysis

Exploration, Journal Year: 2025, Volume and Issue: unknown

Published: March 2, 2025

ABSTRACT Metal nitrides have emerged as promising materials for photoelectrochemical and electrochemical catalysis due to their unique electronic properties structural versatility, offering high electrical conductivity abundant active sites catalytic reactions. Herein, we comprehensively explore the characteristics, synthesis, application of diverse metal nitride catalysts. Fundamental features advantages are presented in terms structure surface chemistry. We deal with synthetic principles parameters catalysts nitrogen source, introducing synthesis strategies various morphologies phases. Recent progress (photo)electrochemical reactions, such hydrogen evolution, oxygen reduction, carbon dioxide biomass valorization is discussed tailored roles. By providing future direction remaining challenges, this review aims guide design from a point view, contributing expanding into energy environmental technologies.

Language: Английский

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Optimization of 3D Metal‐Based Assemblies for Efficient Electrocatalysis: Structural and Mechanistic Studies

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Abstract The commercial utilization of low‐dimensional catalysts has been hindered by their propensity for agglomeration and stacking, greatly minimizing active sites. To circumvent this problem, materials can be assembled into systematic 3D architectures to synergistically retain the benefits constituent nanomaterials, with value‐added bulk properties such as increased surface area, improved charge transport pathways, enhanced mass transfer, leading higher catalytic activity durability compared constituents. hierarchical organization building blocks within structures also enables precise control over catalyst's morphology, composition, chemistry, facilitating tailored design specific electrochemical applications. Despite surge in metal‐based assemblies, there are no reviews encompassing different types assemblies from nanomaterials electrocatalysis. Herein, review addresses gap investigating various self‐supported exploring how electrocatalytic performance elevated through structural modifications mechanistic studies tailor them reactions.

Language: Английский

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