Targeted doping induces interfacial orientation for constructing surface-functionalized Schottky junctions to coordinate redox reactions in water electrolysis

Advanced Powder Materials, Journal Year: 2024, Volume and Issue: 3(5), P. 100224 - 100224

Published: July 27, 2024

Tuning the surface properties of catalysts is an effective method for accelerating water electrolysis. Herein, we propose a directional doping and interfacial coupling strategy to design two surface-functionalized Schottky junction coordinating hydrogen evolution reaction (HER) oxygen (OER). Directional with B/S atoms endows amphiphilic g-C3N4 significant n-/p-type semiconductor properties. Further Fe3C modulates energy band levels B–C3N4 S–C3N4, thus resulting in functionalized specific surface-adsorption The space-charge region generated by dual modulation induces local "OH−- H+-enriched" environment, selectively promoting kinetic behavior OER/HER. Impressively, designed B–C3N4@Fe3C||S–C3N4@Fe3C pair requires only low voltage 1.52 ​V achieve efficient electrolysis at 10 ​mA ​cm−2. This work highlights potential redox reactions electrolysis, thereby resolving trade-off between catalytic activity stability.

Language: Английский

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Tailoring Octahedron-Tetrahedron Synergism in Spinel Catalysts for Acidic Water Electrolysis

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

The instability issues of oxide-based electrocatalysts during the oxygen evolution reaction (OER) under acidic conditions, caused by oxidation and dissolution catalysts along with current-capacitance effect, constrain their application in proton exchange membrane water electrolysis (PEMWE). To address these challenges, we tailored spinel structure Co3O4 exploited synergism between tetrahedron octahedron sites partially substituting Co Ni Ru (denoted as NiRuCoOx), respectively. Such a catalyst design creates Ru-O-Ni electronic coupling facilitating direct dioxygen radical-coupled OER pathway. Density-functional theory (DFT) calculations situ Raman spectroscopy results confirm that is active site diatomic mechanism while stabilizes lattice Ru-O bonding. designed NiRuCoOx exhibits an exceptionally low overpotential 166 mV to achieve current density 10 mA cm-2. Moreover, when serving anode PEMWE, requires 1.72 V reach 3A cm-2, meeting 2026 target set U.S. Department Energy (DOE: 1.8 V@3A cm-2). PEMWE device can operate stably for more than 1500 h significantly reduced performance decay rate 0.025 h-1 compared commercial RuO2 (2.13 h-1). This work provides efficient method tailoring octahedron-tetrahedron Co3O4, which improves activity stability PEMWE.

Language: Английский

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Ru-triggered domino effect constructs a local acid-like environment to achieve the ampere-level current density of a/c-Ru-FeP/IF electrode for alkaline HER

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125030 - 125030

Published: Jan. 1, 2025

Language: Английский

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Transition metal tellurides for water electrolysis: Recent advances and perspectives

Materials Today Energy, Journal Year: 2025, Volume and Issue: unknown, P. 101796 - 101796

Published: Jan. 1, 2025

Language: Английский

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Electrochemical Synthesis of High-Efficiency Water Electrolysis Catalysts

Electrochemical Energy Reviews, Journal Year: 2025, Volume and Issue: 8(1)

Published: Feb. 6, 2025

Language: Английский

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Metal Nitride Catalysts for Photoelectrochemical and Electrochemical Catalysis

Exploration, Journal Year: 2025, Volume and Issue: unknown

Published: March 2, 2025

ABSTRACT Metal nitrides have emerged as promising materials for photoelectrochemical and electrochemical catalysis due to their unique electronic properties structural versatility, offering high electrical conductivity abundant active sites catalytic reactions. Herein, we comprehensively explore the characteristics, synthesis, application of diverse metal nitride catalysts. Fundamental features advantages are presented in terms structure surface chemistry. We deal with synthetic principles parameters catalysts nitrogen source, introducing synthesis strategies various morphologies phases. Recent progress (photo)electrochemical reactions, such hydrogen evolution, oxygen reduction, carbon dioxide biomass valorization is discussed tailored roles. By providing future direction remaining challenges, this review aims guide design from a point view, contributing expanding into energy environmental technologies.

Language: Английский

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Mechanism and research progress of hydrogen spillover in hydrogen evolution reaction

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 1004, P. 175883 - 175883

Published: Aug. 6, 2024

Language: Английский

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Designing Ru–B–Cr Moieties to Activate the Ru Site for Acidic Water Electrolysis under Industrial-Level Current Density

Nano Letters, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 25, 2024

Developing highly efficient non-iridium-based active sites for acidic water splitting is still a huge challenge. Herein, unique Ru-B-Cr moieties have been constructed in RuO

Language: Английский

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2D Metastable‐Phase Hafnium Oxide Triggers Hydrogen Spillover for Boosting Hydrogen Production

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

Published: Feb. 27, 2025

Abstract Hydrogen (H) manipulation plays a significantly important role in many applications, which the occurrence of hydrogen spillover generally shows substrate‐dependent behavior. It therefore remains an open question about how to trigger on substrates that are forbidden. Here new metastable‐phase 2D edge‐sharing oxide: six‐hexagonal phase‐hafnium oxide (Hex‐HfO 2 , space group: P6 3 mc (186)) with coordination number six is demonstrated, serves as ideal platform for activating efficient after loading Ru nanoclusters (Ru/Hex‐HfO ). For stark comparison, strongly forbidden when using stable monoclinic phase HfO (M‐HfO P2 1 /c (14), number: seven) substrate. When applied acidic evolution reaction (HER), Ru/Hex‐HfO exhibits low overpotential 8 mV at 10 mA cm −2 and high utilization activity 14.37 A mg −1 30 mV. Detailed mechanism reveals positive H adsorption free energy Hex‐HfO indicating more likely . Furthermore, strong interaction between optimizes desorption intermediate, thus facilitating surface spillover. The discovery provides guidance developing advanced catalysis.

Language: Английский

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Bridge‐Oxygen Bond: An Active Group for Energy Electrocatalysis

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

Published: March 20, 2025

Abstract Energy electrocatalytic reactions such as hydrogen evolution reaction, oxygen reduction nitrogen carbon etc., are important to solve the current energy shortage and increasing environmental problems. Developing novel efficient catalyts for these has become an essential urgent issue. Catalysts incorporating bridge‐oxygen bond have received attention due their superior conductivity stability, which favorable optimizing reaction mechanism improving kinetics. This paper provides a comprehensive review encompassing concept of bond, means characterization, activity in electrocatalysis effect on catalytic performance. Through this review, it is expected furnish valuable reference rational design catalysts featuring structure across diverse reactions.

Language: Английский

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