Minimizing Product Back Reactions with Inert Carrier Gas Bubbling for Photoelectrochemical Water Splitting with H₂/O₂ Coevolution

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 27, 2025

Language: Английский

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Experimental study of ultrasound-assisted alkaline water electrolysis for hydrogen production

Journal of Mechanical Science and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 31, 2025

Language: Английский

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Multiscale process systems Engineering for electrochemically mediated CO2 Capture: A Mini-Review

Chemical Engineering Science, Journal Year: 2025, Volume and Issue: unknown, P. 121340 - 121340

Published: Feb. 1, 2025

Language: Английский

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Tailoring the Electronic and Hydrophilic Properties of Nickel Oxide Hydroxides by Bismuth Incorporation Toward Enhanced Alkaline Electrocatalytic Water Oxidation

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

Published: Feb. 10, 2025

Abstract Identification of electrocatalysts with suitable electronic and hydrophilic properties is indispensable for boosting the alkaline oxygen evolution reaction (OER). The incorporation bismuth (Bi) into Nickel oxide hydroxides presented to simultaneously tune these catalyst toward enhanced OER. It shown that Bi doping endows more reversibility Ni, enhances lattice reactivity, leads a weakly binding surface resultant NiBi(OH) x electrocatalyst. These can not only accelerate redox transformation OER intermediates but also enhance oxygen‐involved process, which collaboratively boost kinetics. Moreover, manipulates property electrode, facilitates mass transfer by allowing facile diffusion gaseous products electrolytes. As result, optimized Ni 97 3 (OH) electrode delivers current density 500 mA cm −2 at an overpotential 357 mV without losing performance over 1000 h, on par state‐of‐the‐art NiFe anodes. This work provides effective strategy electrocatalytic in through integration regulation modification.

Language: Английский

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Quantification of hydrogen evolution in corrosion testing by buoyancy measurements

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: March 7, 2025

This article describes an improved method for quantifying the hydrogen evolution rate in corrosion testing by using buoyancy measurements. H₂ gas bubbles are collected inverted beaker hanging test solution, and volume is determined measuring exerts on beaker. The new setup procedure described, together with a detailed discussion of limitations error sources. results tests inert cathode magnesium electrodes subject to uniform localised presented. provides useful tool studying terms accuracy, precision, sensitivity. Knowledge its however important. obtained this study show that can be regarded as very accurate down current density around 5 mA/cm² within − 20% accuracy 1 mA/cm². Valuable semi-quantitative or qualitative information densities low 0.1 if performance has been properly characterised. These partly depend generation high supersaturation prior to, during initial part of, test. A general conclusion volumetric measurement inherent negative bias when it comes total production evolving electrochemical reaction due needed form bubbles.

Language: Английский

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Membraneless electrolyzer designed using the tesla valve concept for hydrogen production

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 113, P. 535 - 549

Published: March 1, 2025

Language: Английский

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Atomic‐Scale Robust Modulation of Pt on Monolayer MoS₂ for Enhanced on‐Chip Hydrogen Evolution Reaction

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

Published: March 2, 2025

Abstract Maintaining high catalytic performance while maximizing metal atom utilization requires atomic‐level modulation of catalyst microstructure in noble‐metal design. On‐chip microreactors enable precise measurements activity specific regions, advancing the understanding structure‐property relationships. Here, Pt single atoms (SAs), clusters, and sub‐2.5 nm nanoparticles (NPs) are synthesized on monolayer MoS 2 via defect‐anchoring. electrochemical during hydrogen evolution reaction (HER) demonstrated that clusters‐MoS exhibited superior activity, achieving a 94 mV overpotential at 10 mA cm −2 , much lower than SAs‐MoS (202 mV) NPs‐MoS (259 mV). Density functional theory calculations revealed electron transfer from to clusters altered H* adsorption site, yielding near‐zero Gibbs free energy for enhanced HER activity. The work reveals relationships Pt‐modified catalysts, guiding atom‐efficient noble development emphasizing mapping between preparation, microstructure, performance.

Language: Английский

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Comparing Intrinsic Catalytic Activity and Practical Performance of Ni- and Pt-Based Alkaline Anion Exchange Membrane Water Electrolyzer Cathodes

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

The stringent cost and performance requirements of renewable hydrogen production systems dictate that electrolyzers benefit from the use nonprecious catalysts only if they deliver same level activity durability as their precious metal counterparts. Here we report on recent work to understand interrelationships between intrinsic Ni- Pt-based electrolyzer cathode in zero-gap alkaline water assemblies. Our results suggest nanoparticulate Ni-Mo exhibits HER is roughly 10-fold lower than Pt-Ru basis turnover frequency under low (≤100 mV) polarization conditions. We further found Ni-Mo/C cathodes inhibited by aryl piperidinium anion-exchange ionomers bearing bicarbonate counter-anions. After addressing this poisoning effect, produced assemblies based delivered indistinguishable current density vs cell potential relationships compared otherwise identical with cathodes. This result indicates contribution total small, even for less active catalyst, implies can indeed be replaced alternatives no loss performance.

Language: Английский

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Phase-engineered CoP-Co2P/coal-based carbon fibers composite as self-supporting electrocatalyst for efficient overall water splitting

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 137461 - 137461

Published: March 1, 2025

Language: Английский

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Chloride‐Mediated Electron Buffering on Ni‐Fe Anodes for Ampere‐Level Alkaline Seawater Electrolysis

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

Published: April 1, 2025

Abstract In water electrolysis, the long‐term stability of anodes is compromised by their degradation under oxidative conditions. This issue becomes more pronounced in seawater where natural chloride ion (Cl − ) induces chlorine evolution reaction (ClER) to produce corrosive byproducts. Herein, a series small organic molecules (SOMs), featuring an aromatic carbon ring with para‐positioned carbonyl groups, are integrated conventional nickel‐iron (Ni‐Fe) based anode. integration triggers unique electron buffering effect address anode seawater‐based electrolytes. It found that preferential adsorption Cl onto SOMs prevents its direct interaction metal active sites. Furthermore, SOM‐Cl serving as group significantly reduces dissolution Fe sites highly environment. As result, SOM‐Cl‐engineered enhances oxygen activity ≈1.7 times compared pure water. addition, rationally designed works stably for over 200 h at high current density 1.3 A cm −2 alkaline electrolyzer (ASE).

Language: Английский

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