Advances in MOFs and their derivatives for non‑noble metal electrocatalysts in water splitting

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 503, P. 215639 - 215639

Published: Jan. 8, 2024

Language: Английский

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Phosphorus Defect Mediated Electron Redistribution to Boost Anion Exchange Membrane‐Based Alkaline Seawater Electrolysis

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(31)

Published: May 20, 2024

Abstract It is of essential importance to design bifunctional electrocatalysts with excellent performance for both hydrogen evolution reaction (HER) and oxygen (OER) in seawater splitting. Herein, an approach manipulating electron redistribution NiCoP treated by P defect (P v ) engineering (NiCoP @NF) presented, exhibiting catalytic activities stability toward HER/OER alkaline solution. The reduces the surface electrooxidation reconfiguration energy barrier, making it easier drive local conversion crystals active oxy(hydroxide) OER. In addition, Ni site Co NiCoOOH are sites HER OER processes, respectively. situ generated PO 4 3− adsorbed on catalyst causes spatial repulsion, preventing Cl − corrosion electrolysis. AEM electrolyzer using @NF couple achieves high activity (2.43 V at 500 mA cm −2 long‐term durability (500 over 110 h). working efficiency 1.0 M KOH as 77.0% 100 price per GGE H 2 low $ 0.87.

Language: Английский

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Interfacial engineering of heterostructured CoP/FeP nanoflakes as bifunctional electrocatalyts toward alkaline water splitting

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 679, P. 20 - 29

Published: Oct. 18, 2024

Language: Английский

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Enhancing Electrocatalytic Activity Through Targeted Local Electrolyte Micro‐Environment

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

Published: Jan. 10, 2025

Abstract The local electrolyte micro‐environment surrounding the catalyst reaction center, including critical factors such as pH, reactant concentration, and electric field, plays a decisive role in electrocatalytic reactions water splitting. Recently, this topic has garnered significant attention due to its potential significantly enhance catalytic performance. While various strategies optimize processes have been explored, deliberate control over fundamental principles guiding these adjustments remain their early stages of development. This review provides comprehensive examination key efforts aimed at designing tailoring localized micro‐environments improve It discusses advances micro‐environmental design, methodologies for evaluating shifts, mechanistic insights driving developments. Additionally, highlights existing challenges prospective industrial applications strategies. By offering detailed analysis recent developments, aims equip researchers with practical knowledge on controlling micro‐environments, thereby accelerating progress toward real‐world processes.

Language: Английский

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A Highly Active and Durable Hierarchical Electrocatalyst for Large-Current-Density Water Splitting

Nano Letters, Journal Year: 2023, Volume and Issue: 23(19), P. 9087 - 9095

Published: Sept. 25, 2023

Designing bifunctional catalysts with high current densities under industrial circumstances is crucial to propelling hydrogen energy a boost from fundamental practical application. In this work, heterojunction nanowire arrays consisting of manganese oxide and cobalt phosphide (denoted as MnO-CoP/NF) are designed meet the demand by regulating synergic mass transport electronic structure coupling numerous nano-heterogeneous interfaces. The optimal MnO-CoP/NF electrode exhibits remarkable electrocatalytic performance overpotentials 259.5 mV for evolution at large density 1000 mA cm-2 392.2 oxygen 1500 cm-2. Moreover, demonstrates superior durability an ultralow voltage 1.76 V 500 cm-2, outperforming that commercial RuO2||Pt/C electrode. This work sheds light on design metallic heterostructures optimized interfacial structures abundance active sites water splitting applications.

Language: Английский

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Boosting cascade electron transfer in NiFe oxyhydroxide for overall water splitting

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 124(7)

Published: Feb. 12, 2024

Nickel–iron oxyhydroxides are among the most active electrocatalysts, but their sluggish kinetic of oxygen evolution reaction (OER) limits energy efficiency toward overall water splitting. Here, we present a “cascade electron transfer” strategy through spurring unidirectional transfer different metal sites in Mn-doped FeNiOOH@FeNiP to boost OER and The Mn doping induces cascade from Ni Fe then via metal-O-metal bridge, thus promoting oxidation centers, which turn help charge by increasing covalency between metal-O bonds optimize bonding strength adsorbed species. Consequently, optimal Mn–FeNiOOH@FeNiP delivers fast kinetics (32.1 mV dec−1) along with low overpotential 215 mV@10 mA cm−2. Benefiting synergistic effect high conductivity, large specific surface area, favorable kinetics, catalyst only requires cell voltage 1.456 V achieve 20 cm−2 for splitting, superior that commercial RuO2ǁPt/C catalyst.

Language: Английский

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p–d Orbitals Coupling Heterosites of Ni₂P/NiFe‐LDH Interface Enable O─H Cleavage for Water Splitting

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(40)

Published: Aug. 11, 2024

Abstract Electrocatalytic water splitting for hydrogen production still faces a bottleneck due to sluggish reactive kinetics and high energy barriers. Herein, p–d orbital coupling P–Fe heterosites are constructed at Ni 2 P–FeNi‐LDH interfaces enhance the O─H bond cleavage of reaction intermediates H O* OH* oxygen evolution (OER) (HER), respectively. The P/NiFe‐LDH heterostructure shows superior HER OER activities alkaline with overpotentials 230 270 mV 100 mA cm −2 , respectively, even exhibits activity electrocatalytic seawater splitting. interaction P 2p Fe 3d orbitals upshifts d‐band center downshifts p‐band P. This finding not only facilitates dissociation bonds in O promotes Volmer–Heyrovsky step HER, but also reduces barrier rate‐determining from transition. work proposes new approach constructing heterojunctions facilitate reduce electrocatalysis.

Language: Английский

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Boosting Urea-Assisted Natural Seawater Electrolysis in 3D Leaf-Like Metal–Organic Framework Nanosheet Arrays Using Metal Node Engineering

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(22), P. 28625 - 28637

Published: May 20, 2024

Metal node engineering, which can optimize the electronic structure and modulate composition of poor electrically conductive metal–organic frameworks, is great interest for electrochemical natural seawater splitting. However, mechanism underlying influence mixed-metal nodes on electrocatalytic activities still ambiguous. Herein, a strategic design comprehensively demonstrated in mixed Ni Co metal redox-active centers are uniformly distributed within NH2–Fe-MIL-101 to obtain synergistic effect overall enhancement activities. Three-dimensional metallic MOF nanosheet arrays, consisting three different nodes, were situ grown foam as highly active stable bifunctional catalyst urea-assisted A well-defined NH2–NiCoFe-MIL-101 reaches 1.5 cm–2 at 360 mV oxygen evolution reaction (OER) 0.6 295 hydrogen (HER) freshwater, substantially higher than its bimetallic monometallic counterparts. Moreover, electrode exhibits eminent catalytic activity stability seawater-based electrolytes. Impressively, two-electrode alkaline electrolysis cell based needs only 1.56 yield 100 mA cm–2, much lower 1.78 V cells superior long-term current density 80 h.

Language: Английский

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Cooperative effects between NiMo alloy enable highly efficient for all-pH-value and alkaline seawater hydrogen evolution

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 358, P. 124388 - 124388

Published: July 9, 2024

Language: Английский

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Iron-doped cobalt phosphide nanowires prepared via one-step solvothermal phosphidization of metal–organic frameworks for the oxygen evolution reactions

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(9), P. 5308 - 5325

Published: Jan. 1, 2024

A solvothermal phosphidization method is adopted to construct CoFeP nanowires electrochemically catalyze oxygen evolution reaction.

Language: Английский

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