Exploring Ni-Based Alkaline OER Catalysts: A Comprehensive Review of Structures, Performance, and In Situ Characterization Methods

DeCarbon, Journal Year: 2025, Volume and Issue: unknown, P. 100097 - 100097

Published: Jan. 1, 2025

Language: Английский

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Unveiling Oxygen Vacancy Engineering in CoMo‐Based Catalysts for Enhanced Oxygen Evolution Reaction Activity

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

Published: Jan. 8, 2025

Abstract Oxygen vacancy (V O ) engineering is widely regarded as a key strategy for enhancing CoMo‐based catalysts oxygen evolution reaction (OER) while understanding their formation mechanisms and role in boosting OER activity remains significant challenge. Herein, CoMoO x system doped developed with different 3 d ‐orbital atoms M (V, Ni, Zn, Mn) to investigate the construction stabilization of V its crucial performance. In situ ex measurements along theoretical calculations demonstrate that doping adjusts bandgap between CoMo‐ ‐p orbitals, leading transfer electrons from O‐ p orbitals M‐ thereby promoting . The leads an upshifted ‐band center, optimizing desorption intermediates on ‐CoMoVO lowering energy barrier rate‐determining step (RDS), catalyst's activity. Additionally, promotes electron Co atoms, stabilizing ultimately improving stability. resulting catalyst delivered attractive (overpotential 248 mV at 10 mA cm −2 durability over 600 h. This study offers rational method designing efficient electrocatalysts.

Language: Английский

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Surface Corrosion‐Resistant and Multi‐Scenario MoNiP Electrode for Efficient Industrial‐Scale Seawater Splitting

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

Published: Oct. 30, 2024

Abstract The construction of efficient and durable multifunctional electrodes for industrial‐scale hydrogen production presents a main challenge. Herein, molybdenum‐modulated phosphorus‐based catalytic (Mo‐NiP@NF) are prepared via mild electroless plating. Heteroatoms doping or heterostructures can reconfigure the intrinsic electronic structure pre‐catalyst optimizes key intermediates adsorption. Moreover, (hypo/meta‐)phosphite anions (PO x δ− ) molybdate ions (MoO on electrode surface Mo‐NiP@NF afford resistance to chloride (Cl − corrosion. exhibits ultralow overpotentials 278/550 282/590 mV at 1 A cm −2 during hydrogen/oxygen evolution reaction (HER/OER) in alkaline simulated real seawater, respectively, whereas overall seawater splitting (OWS) reach 1.96 1.97 V cell . Remarkably, maintains stable operation 1500 h OWS. scalability allowing assembly proton exchange membrane (PEM) electrolyzer powered by photovoltaic energy, simulating portable hydrogen‐oxygen respirator provides an oxygen/hydrogen flows 160/320 mL min −1 Expanding further, trace ruthenium‐loaded catalyst sodium borohydride (NaBH 4 hydrolysis achieving generation rate (HGR) 11049.2 g This work strategic innovations optimization solutions economical multi‐scenario green energy conversion materials application.

Language: Английский

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High-Entropy Ultrathin Amorphous Metal–Organic Framework-Stabilized Ru(Mo) Dual-Atom Sites for Water Oxidation

ACS Energy Letters, Journal Year: 2024, Volume and Issue: unknown, P. 5763 - 5770

Published: Nov. 6, 2024

High-entropy metal–organic frameworks (HE-MOFs) offer immense potential in electrocatalysis due to their diverse metallic compositions and high densities of active sites. Integrating bimetallic single-atom catalysts (SACs) with HE-MOFs for enhanced oxygen evolution reaction (OER) performance remains challenging. Here, we stabilize atomically dispersed Ru Mo amorphous HE-MOF nanosheets (HE(Ru,Mo)-MOFs) via situ-formed high-entropy oxides, elucidating the deprotonation mechanism. Evidence supports presence high-density O-bridged dual-atom The multimetallic composition induces electronic redistribution balances oxidation state metal sites, enhancing intrinsic OER activity. HE(Ru,Mo)-MOFs exhibit low overpotentials 267 mV@10 mA cm–2 266 alkaline freshwater industrial wastewater, respectively, exceptional durability surpassing that commercial RuO2 catalysts. Mechanistic insights reveal atomic dispersion facilitates rapid charge transfer intermediate transformation, promising advanced energy conversion.

Language: Английский

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In-situ construction of CeO2-Co3O4 heterostructure on nickel foam for efficient oxygen evolution reaction

Journal of Solid State Chemistry, Journal Year: 2025, Volume and Issue: 344, P. 125209 - 125209

Published: Jan. 15, 2025

Language: Английский

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Electronic Communication Between Single Atomic Nickel and Iron‐Nitrogen Species Promote the Bifunctional Oxygen Evolution and Reduction for Efficient Rechargeable Zinc‐Air Battery

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

Published: Feb. 3, 2025

Abstract The reversible oxygen evolution/reduction reaction (OER/ORR) have been recognized as the key electrochemical process for next‐generation energy conversion and storage (ECS) devices, such fuel cells metal‐air batteries. However, intrinsic large overpotential barrier caused by oxygen‐containing intermediates (*OH, *O, *OOH) greatly hamper kinetics of OER/ORR. In this work, a dual‐functional OER/ORR electrocatalyst composed Ni single atomic sites FeN 0.0324 nanoclusters within unique core–shell structure @NiN 4 /C is constructed. Benefiting from efficient synergistic electronic effect , exhibits excellent electrocatalytic activities OER with an 258 mV at 10 mA cm −2 ORR half‐wave potential (E 1/2 ) 0.89 V. A liquid zinc‐air battery assembled achieves maximum peak power density 180.9 mW cycle endurance stability more than 150 h. Density functional theory (DFT) calculation indicates that d ‐band center near Fermi level NiN ‐FeN shifted upward in comparison pristine H, which effectively optimizes adsorption *O alleviates troublesome process. This study provides new platform construction electrocatalysts field devices.

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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Activating La−O−Ni Bridge in Ordered Macroporous Interface for Electrochemical Urea Wastewater Purification

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Electrochemical treatment of urea wastewater purification significantly aids in environmental protection, but it remains a considerable challenge designing high performance anode oxidation electrocatalysts. Herein, we report La-induced three-dimensional ordered macroporous (3DOM) NiO heterostructure to improve Ni sites electron density for electrooxidation by activating the La-O-Ni bridge. This material demonstrated exceptional membrane electrode assembly (MEA) device, characterized low cell voltage (1.49 V @ 80 °C) and 280 h stability test at 1 A cm-2 current (25 displayed promising efficiency purification. Permeation experiments revealed crucial role 3DOM morphological facilitating mass transfer processes. valence nickel mechanism (HNM) on bridge during catalysis was proposed, based various situ characterizations theoretical calculations. Experimentally, Raman UV-vis spectra that active species Niδ+ (δ≥3) promote kinetics, while ATR-IR proved strong adsorption C=O with enhancement N-H bonds cleavage, supporting HNM. work enables us underscore critical importance architectures contributions

Language: Английский

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The synergistic effect of Ni–NiMo₄N₅ heterointerface construction and Fe-doping enables active and durable alkaline water splitting at industrial current density

Journal of Materials Chemistry A, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The synergistic effect of heterogeneous interfaces and doping optimizes electronic structure accelerates charge transfer, significantly boosting alkaline water electrolysis performance.

Language: Английский

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Regulating coordination environment of Co single-atom through Ni/Co sulphides synergistic heterointerfaces towards efficient bifunctional oxygen electrocatalysts

Journal of Materials Chemistry A, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Achieving synergistic catalysis between different components and maintaining a high catalytic activity is an effective way to enhance the efficiencies of oxygen reduction reaction (ORR) evolution (OER).

Language: Английский

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