Oxygen radical coupling on asymmetric Ni-Co dual-sites induced by rare earth hydroxides for enhanced alkaline oxygen evolution reaction

Journal of Rare Earths, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

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Tungsten Defect‐Induced Surface Reconstruction of Ce₂W₂O₉ Arrays for Enhanced Oxygen Evolution Reaction Performance

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

Published: April 7, 2025

Abstract Cerium oxide has emerged as a crucial promoter for regulating the electrocatalytic oxygen evolution reaction (OER) performance of other active components; however, mechanism underlying its intrinsic activity remains poorly understood. Herein, novel self‐supported coral‐like Ce 2 W O 9 array is synthesized on carbon cloth using simple ion‐exchange method. The in situ electrochemical surface reconstruction facilitated formation defects, which effectively altered local bonding environment atoms. Based advanced characterization techniques and theoretical calculations, it concluded that optimized centers served sites, substantially reducing energy barrier potential‐determining step ( * OOH formation), turn, facilitating generation boosting activity. Consequently, reconstructed electrode exhibited an exceptionally low overpotential 351 mV at 100 mA cm −2 1 m KOH, while maintaining remarkable stability over 000 h 20 . This study provides valuable insights into mechanistic understanding strategic design rare‐earth oxide‐based electrocatalysts.

Language: Английский

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Activating and stabilizing lattice oxygen by synergetic defect engineering and surface reconstruction into CeOx/CoP for electrocatalytic oxygen evolution

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 163282 - 163282

Published: April 1, 2025

Language: Английский

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Two‐Step Tandem Catalysis for High‐Efficiency Ammonia Synthesis Via Nitrate Reduction on Anion‐Intercalated CoNi LDH and Cu/Cu₂O

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: April 15, 2025

Abstract Ammonia is essential across industry, agriculture, and as a future carbon‐free energy carrier. Electrocatalytic nitrate reduction (NitRR) offers sustainable path for removing contaminants from wastewater groundwater while using abundant ions nitrogen sources under eco‐friendly conditions. However, the NitRR pathway, which involves sequential reactions, poses challenges in synchronizing rate of nitrate‐to‐nitrite conversion with subsequent nitrite to ammonia, particularly initial step rate‐limiting. This study presents CoNi layered double hydroxide (LDH) approach finely control hydrogen radical (*H) supply, paired Cu/Cu 2 O redox coupling, achieve optimal matching. LDH engineered various anion intercalations (NO 3 − , Cl SO 4 2− MoO WO ) regulate *H capacity. By integrating LDH, tandem kinetic descriptors, including volcano curve, are employed predict constants, facilitating ideal matching efficient ammonia synthesis. The optimized ‐CoNi LDH/CuO NW/CF electrode demonstrated exceptional performance, achieving 99.78% Faraday efficiency, yield 1.12 mmol cm −2 h −1 at −0.2 V vs. RHE, robust 14‐h stability. model descriptors effectively elucidated linking reaction rates factors impacting production.

Language: Английский

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Rational Design of Rare Earth-Based Nanomaterials for Electrocatalytic Reactions

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: May 1, 2025

Rare earth-based nanomaterials hold great promise for applications in the electrocatalysis field owing to their unique 4f electronic structure, adjustable coordination modes, and high oxophilicity. As a cocatalyst, location of rare earth elements can alter intrinsic properties support, including environments, structure evolution under applied potentials variable manner, potentially impact catalytic performance with respect activity, stability, selectivity. Therefore, comprehensive understanding effects elements' on local reaction mechanisms is prerequisite designing advanced nanomaterials. In this review, have been categorized into three main groups based upon namely lattice, surface, interface structure. We initially discuss recent advances representing breakthroughs realize controllable synthesis Next, we state-of-the-art modulation strategy employed enhance performance. Combined characterizations, role process also discussed. Finally, further highlight future research directions remaining challenges development practical applications.

Language: Английский

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In Situ Phase Transformation-Induced High-Activity Nickel–Molybdenum Catalyst for Enhancing High-Current-Density Water/Seawater Splitting

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 21, 2025

Anion exchange membrane water electrolyzer (AEMWE) represents a promising sustainable method for large-scale industrial-grade hydrogen manufacturing. However, the sluggish kinetics of bifunctional oxygen/hydrogen evolution reaction (OER/HER) electrocatalysts makes it imperative to develop high-performance anode and cathode materials. Herein, P-doped β-phase NiMoO4 (p-β-NiMoO4) nanorods were first constructed as material HER, then α-phase (p-β-NiMoO4-A) derived by an electrochemical phase transformation mechanism was further applied OER. A series characterizations supported that applying sufficient potential β-NiMoO4 can drive from beta alpha. Compared with directly prepared counterpart, this dynamic results in catalyst tuning atomic configuration environment, modifying electronic state, optimizing *OH adsorption ability. Consequently, assembled two-electrode electrolytic cell system contributes remarkable overall water/seawater splitting capacity outstanding long-term durability even under operating conditions. The AEMWE device ultralow voltage 2.15 V at 2.0 A·cm–2 current density confirms applicability electrocatalysts. This study could provide path realize efficient transition nickel–molybdenum-based materials industrial clean energy conversion.

Language: Английский

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Molybdenum-doping to enhance the deprotonation ability of nickel-based hydroxide electrocatalysts for ethanol oxidation

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 680, P. 441 - 452

Published: Nov. 2, 2024

Language: Английский

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Recent advantages on mass transfer structure construction in transition metal‐based cost‐effective catalyst toward alkaline oxygen evolution

ChemCatChem, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 9, 2024

Abstract The electrochemical oxygen evolution reaction (OER) can be combined with various reactions to fabricate energy conversion and storage devices while the slow kinetics poor mass transfer capability at high current densities are key constraints its large‐scale application. Therefore, this review primarily focuses on design optimization of structures TM‐metal‐based OER catalysts. Nanostructuring, porous design, creation hierarchical architectures have been applied during catalyst synthesis enhance surface area accessibility, thereby improving catalytic efficiency. Strategies including doping, substrate invitation, soft/hard templating utilized accelerate as well ion/electron conduction efficiency for overall improvement performance These developments underline critical role advanced material in achieving high‐performance catalysts highlight potential TM‐based materials cost‐effective scalable applications.

Language: Английский

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In-situ surface reconstruction of Co-based imidazole zeolite framework by Mo etching for superior water oxidation

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 678, P. 111 - 119

Published: Sept. 11, 2024

Language: Английский

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Construction of CeO2/Co(OH)2/FeS@NF nanosheet arrays for high-performance electrocatalytic oxygen evolution/urea oxidation, and overall water/urea splitting reactions

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 94, P. 706 - 715

Published: Nov. 15, 2024

Language: Английский

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