Ir Nanoparticles Anchored on Metal‐Organic Frameworks for Efficient Overall Water Splitting under pH‐Universal Conditions

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(17)

Опубликована: Март 2, 2023

The construction of high-activity and low-cost electrocatalysts is critical for efficient hydrogen production by water electrolysis. Herein, we developed an advanced electrocatalyst anchoring well-dispersed Ir nanoparticles on nickel metal-organic framework (MOF) Ni-NDC (NDC: 2,6-naphthalenedicarboxylic) nanosheets. Benefiting from the strong synergy between MOF through interfacial Ni-O-Ir bonds, synthesized Ir@Ni-NDC showed exceptional electrocatalytic performance evolution reaction (HER), oxygen (OER) overall splitting in a wide pH range, superior to commercial benchmarks most reported electrocatalysts. Theoretical calculations revealed that charge redistribution bridge induced optimization H2 O, OH* H* adsorption, thus leading accelerated electrochemical kinetics HER OER. This work provides new clue exploit bifunctional pH-universal splitting.

Язык: Английский

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Multiscale Hierarchical Structured NiCoP Enabling Ampere‐Level Water Splitting for Multi‐Scenarios Green Energy‐to‐Hydrogen Systems

Advanced Energy Materials, Год журнала: 2023, Номер 13(22)

Опубликована: Апрель 28, 2023

Abstract Efficient and stable low‐cost catalysts are seriously lacking for industrial water electrolysis at large‐current‐density. To meet industrial‐scale hydrogen production, fully utilized active sites by a rational structure design is an attractive route. Herein, dynamic microstructure manipulation of bimetallic phosphide NiCoP conducted. Among different microstructures NiCoP, as‐obtained NiCoP‐120 hydrothermal temperature 120 °C, shows special multiscale hierarchical from 3D‐nickel foam substrates, 2D‐nanosheets to 1D‐nanoneedles, which conducive efficient utilization rapid gas release, thus manifesting outstanding electrocatalytic activities stability as required industry. reach current density 10 1000 mA cm −2 the evolution reaction (HER), requires ultra‐low overpotentials 56 247 mV, respectively. Particularly, bifunctional catalyst, it only needs 1.981 V drive 1 A overall splitting can maintain output 600 h, superior almost all reported non‐noble metal catalysts. Moreover, its application prospect in integrated green energy‐to‐hydrogen systems, including sunlight, wind, thermal, lithium cells, well demonstrated. This work provides guiding strategy establishment externally driven water‐splitting production system.

Язык: Английский

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Recent advances of transition‐metal metaphosphates for efficient electrocatalytic water splitting

Carbon Energy, Год журнала: 2023, Номер 5(12)

Опубликована: Апрель 25, 2023

Abstract Sustainable production of H 2 through electrochemical water splitting is great importance in the foreseeable future. Transition‐metal metaphosphates (TMMPs) have a three‐dimensional (3D) open‐framework structure and high content P (which exists as PO 3 − ), therefore been recognized highly efficient catalysts for oxygen evolution reaction (OER) bottleneck splitting. Furthermore, TMMPs can also contribute to hydrogen (HER) alkaline neutral media by facilitating dissociation, thus, overall be achieved using this kind material. In timely review, we summarize recent advances synthesis their applications OER HER. We present brief introduction synthetic strategies first two parts. Then, review latest progress made research on OER, HER, water‐splitting electrocatalysts. part, intrinsic activity well current strategy improving catalytic will discussed systematically. Finally, future opportunities remaining challenges application electrocatalysis field.

Язык: Английский

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D‐Orbital Manipulated Ru Nanoclusters for High‐Efficiency Overall Water Splitting at Industrial‐Level Current Densities

Advanced Functional Materials, Год журнала: 2023, Номер 34(7)

Опубликована: Окт. 30, 2023

Abstract Owing to the Pt‐like electrocatalytic capability and moderate price, Ru‐based catalysts are considered as Pt alternatives for electrochemical water splitting. However, they demonstrate limited catalytic performance under industrial‐level current densities. Herein, a novel electrocatalyst with an extremely low amount (0.85 wt.%) of Ru nanoclusters anchored on Cr‐doped Fe‐metal–organic frameworks (Ru@Cr─FeMOF) through robust Cr─O─Ru bond is presented. The study unveils that such architecture facilitates fast electron transfer manipulates highest occupied d orbital d‐band centers sites, favoring both oxygen evolution reaction (OER) hydrogen (HER) catalysis. as‐prepared catalyst performs excellent activity 21 mV@10 mA cm −2 HER 230 mV@50 OER in alkaline solution, realizes water‐splitting at densities (1.72 V@1000 ), surpassing state‐of‐the‐art literatures.

Язык: Английский

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Emerging Atomically Precise Metal Nanoclusters and Ultrasmall Nanoparticles for Efficient Electrochemical Energy Catalysis: Synthesis Strategies and Surface/Interface Engineering

Electrochemical Energy Reviews, Год журнала: 2024, Номер 7(1)

Опубликована: Март 9, 2024

Язык: Английский

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Hetero‐Interface Manipulation in MoO_x@Ru to Evoke Industrial Hydrogen Production Performance with Current Density of 4000 mA cm⁻²

Advanced Energy Materials, Год журнала: 2023, Номер 13(32)

Опубликована: Июль 21, 2023

Abstract Constructing and manipulating hetero‐interfaces for the electrocatalytic hydrogen evolution reaction (HER) is highly desirable, but still poses a significant challenge. Herein, this work adopts facile way to controllably synthesize three different by anchoring ultrafine Ru nanoparticles on various MoO x nanotube (NT) substrates, including 2 , /MoO 3 . Remarkably, @Ru NT displays excellent HER activity with tiny overpotentials of 89 131 mV delivering large current densities 500 1000 mA cm −2 respectively, far surpassing two other hetero‐interfaces, commercial Ru/C, Pt/C catalysts. Impressively, hetero‐interface even achieves an exceptionally density 4000 at overpotential 322 mV. Moreover, presents exceptional stability least 100 h negligible degradation. Both experimental observations theoretical calculations suggest that moderate electron transfer from enhances water dissociation kinetics, optimizes adsorption/desorption, thus simultaneously speeding up kinetics. Furthermore, anion exchange membrane electrolyzer assembled obtained as cathode electrocatalyst, shows attractive durability, low voltage 1.78 V prolonged time period 200

Язык: Английский

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Fe‐Regulated Amorphous‐Crystal Ni(Fe)P₂ Nanosheets Coupled with Ru Powerfully Drive Seawater Splitting at Large Current Density

Small, Год журнала: 2023, Номер 19(36)

Опубликована: Май 5, 2023

Water electrolysis is an ideal method for industrial green hydrogen production. However, due to increasing scarcity of freshwater, it inevitable develop advanced catalysts electrolyzing seawater especially at large current density. This work reports a unique Ru nanocrystal coupled amorphous-crystal Ni(Fe)P2 nanosheet bifunctional catalyst (Ru-Ni(Fe)P2 /NF), caused by partial substitution Fe Ni atoms in , and explores its electrocatalytic mechanism density functional theory (DFT) calculations. Owing high electrical conductivity crystalline phases, unsaturated coordination amorphous couple species, Ru-Ni(Fe)P2 /NF only requires overpotentials 375/295 520/361 mV drive 1 A cm-2 oxygen/hydrogen evolution reaction (OER/HER) alkaline water/seawater, respectively, significantly outperforming commercial Pt/C/NF RuO2 catalysts. In addition, maintains stable performance 600 mA 50 h water seawater, respectively. provides new way design toward industrial-level splitting.

Язык: Английский

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Advanced noble-metal/transition-metal/metal-free electrocatalysts for hydrogen evolution reaction in water-electrolysis for hydrogen production

Coordination Chemistry Reviews, Год журнала: 2024, Номер 514, С. 215899 - 215899

Опубликована: Май 13, 2024

Язык: Английский

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Precisely tailoring the d-band center of nickel sulfide for boosting overall water splitting

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 359, С. 124461 - 124461

Опубликована: Июль 31, 2024

Язык: Английский

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Cu‐Co Dual Sites Tandem Synergistic Effect Boosting Neutral Low Concentration Nitrate Electroreduction to Ammonia

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Фев. 17, 2025

Abstract Electrochemical nitrate reduction reaction (NO 3 − RR) has emerged as an alternative strategy for wastewater treatment and ammonia production in neutral low‐concentration nitrate. However, the electrocatalyst faces challenge of limited NO distribution deficient active hydrogen (H ads ) on catalyst surface resulting from low concentration difficulty water splitting under conditions. Here, a Cu‐Co dual sites tandem synergistic catalysis mechanism been proposed by doping Cu into CoP to facilitate adsorption conversion accelerate leading significantly high RR performance. The designed Cu‐CoP exhibits yield 7.65 mg h −1 cm −2 Faraday efficiency 85.1% at −1.0 V (10 m M ), which is highest reported data. In situ characterization theoretical calculations confirm effect, site favors activation form 2 , concurrently modulates electronic structure Co with optimized H enhanced

Язык: Английский

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