Unique CoP Microflower Decorated with Phosphorous‐Enriched PtP₂ onto Nickel Foam with Interfacial Electronic Interactions to Boost Alkaline Water‐Splitting

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(27)

Published: March 1, 2024

Abstract The development of stable and efficient electrocatalysts for overall freshwater/seawater water‐splitting has received significant attention. In this study, the fabrication electrocatalytic properties phosphorus‐enriched PtP 2 dispersed on CoP (PtP /CoP) HER OER in both alkaline fresh/seawater media are described. Physical characterization density functional theory calculations reveal that strong electronic interfacial interactions between optimized reaction kinetics by regulating adsorption/desorption intermediates cleavage reactants. Additionally, operando electrochemical impedance spectroscopy reveals /CoP significantly decreased phase angle with increasing applied potential compared CoP, demonstrating construction heterostructure provides a faster charge transfer surface inner layer. Notably, catalyst only requires overpotentials 101 298 mV to achieve benchmark 100 mA cm −2 freshwater OER. Moreover, prepared featured 108 330 an seawater electrolyte. Furthermore, high‐efficiency water electrolysis operation can be achieved using as anode cathode (1.63 V@100 ) coupled satisfactory durability. This finding deeper comprehension interaction Pt‐less compounds matrix electrocatalysis bifunctional electrocatalysts.

Language: Английский

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Job-synergistic engineering from Fe3N/Fe sites and sharp-edge effect of hollow star-shaped nitrogen-doped carbon structure for high-performance zinc-air batteries

Carbon, Journal Year: 2023, Volume and Issue: 214, P. 118333 - 118333

Published: July 28, 2023

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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Grain Boundary Tailors the Local Chemical Environment on Iridium Surface for Alkaline Electrocatalytic Hydrogen Evolution

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(7)

Published: Dec. 28, 2023

Even though grain boundaries (GBs) have been previously employed to increase the number of active catalytic sites or tune binding energies reaction intermediates for promoting electrocatalytic reactions, effect GBs on tailoring local chemical environment catalyst surface has not clarified thus far. In this study, a GBs-enriched iridium (GB-Ir) was synthesized and examined alkaline hydrogen evolution (HER). Operando Raman spectroscopy density functional theory (DFT) calculations revealed that acid-like with H

Language: Английский

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Coordination Engineering of Carbon Dots and Mn in Co‐Based Phosphides for Highly Efficient Seawater Splitting at Ampere‐Level Current Density

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

Published: May 22, 2024

Abstract Direct electrolysis of seawater to generate hydrogen is an attractive approach for storing renewable energy. However, direct splitting suffers from low current density and limited operating stability, which severely hinders its industrialization. Herein, a promising strategy reported obtain nano needle‐like array catalyst‐CDs‐Mn‐Co x P on nickel foam, in the Mn─O─C bond tightly binds Mn, Carbon dots (CDs), Co together. The coordination engineering CDs Mn not only effectively regulates electronic structure P, but also endows as‐prepared catalyst with selectivity marked long‐term stability at ampere‐level density. Low overpotentials 208 447 mV are required achieve 1000 mA cm −2 evolution reaction (HER) Oxygen (OER) simulated seawater, respectively. Cell potentials 1.78 1.86 V needed reach 500 alkaline along excellent durability 350 h. DFT studies have verified that introduction shifts d‐band center Co‐3d toward higher energy, thereby strengthening adsorption intermediates enhancing catalytic activity. This study sheds light development highly effective stable catalysts large‐scale electrolysis.

Language: Английский

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“Tip effect” of hexagram-like Co-doped MoC heterostructure for hydrogen evolution reaction

Applied Surface Science, Journal Year: 2023, Volume and Issue: 627, P. 157284 - 157284

Published: April 18, 2023

Language: Английский

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Encapsulation of CoS2 nanoparticles in 3D star-like N-doped graphitized carbon/carbon nanotubes nanocomposites for the detection of hydrazine in human urine and food

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2023, Volume and Issue: 672, P. 131780 - 131780

Published: May 31, 2023

Language: Английский

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Critical challenges and opportunities for the commercialization of alkaline electrolysis: high current density, stability, and safety

Materials Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 8(1), P. 41 - 81

Published: Sept. 23, 2023

Alkaline electrolysis technology, which enables the production of “green hydrogen,” holds significant importance in global pursuit carbon neutrality.

Language: Английский

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3D‐Porous Electrocatalyst with Tip‐Enhanced Electric Field Effect Enables High‐Performance Proton Exchange Membrane Water Electrolyzer

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

Published: Jan. 13, 2025

Abstract Hydrogen evolution reaction (HER), as one of the most advanced methods for green production hydrogen, is greatly impeded by inefficient mass transfer. Here we present an efficiently reactant enriched and traffic system integrating high‐curvature Pt nanocones with 3D porous TiAl framework to enhance transfer rate. Theoretical simulations, in situ Raman spectroscopy potential‐dependent Fourier transform infrared results disclose that strong local electric field induced can promote H 3 O + supply rate during HER, resulting ∼1.6 times higher concentration around nanocone than electrolyte. X‐ray computed tomography molecular dynamic simulation demonstrate diffusion coefficient surpasses commercial carbon support more 16.7 times. Consequently, Pt/TiAl‐nanocone exhibits a high activity 17.2 mA cm −2 at overpotential 100 mV ultrahigh TOF value 42.9 atom −1 s . In proton exchange membrane water electrolyzer, cathode achieves industrial‐scale current density 1.0 A cell voltage 1.88 V 60 °C operate stably least 800 h sluggish decay 137 µV

Language: Английский

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Self‐Adaptive Dielectrics with Tunable Nonlinear Electrical Conductivity via Virus‐Like Structures Composed of Metal Particles

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

Published: Jan. 12, 2025

Abstract Self‐adaptive dielectrics (SADs), with the characteristics of rapid charge dissipation in electric field distortion, is regarded as future material for package insulation advanced electronic devices. The current landscape SADs incapable to achieve tunable nonlinear electrical conductivity and threshold strength due inherent Schottky barrier, significantly limiting application scenarios SADs. Here, a strategy reported construct stepped barrier through virus‐like structures, which are composed subminiature metal particles semiconductor microspheres. It found that can serve capture center attract free matrix, precisely instructing transfer pathway. barriers between filler, flexibly controlled by composition particles, endow extra source conductivity. Under optimal size exhibit prominent reliable adaptive release under pulsed field. work pioneers breakthrough overcoming constraint previously limited materials enabling unprecedented controllability flexibility contributing distinctive perspective development

Language: Английский

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