Heterojunction Engineering of Multinary Metal Sulfide‐Based Photocatalysts for Efficient Photocatalytic Hydrogen Evolution

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(11)

Published: Dec. 2, 2023

Photocatalytic hydrogen evolution (PHE) via water splitting using semiconductor photocatalysts is an effective path to solve the current energy crisis and environmental pollution. Heterojunction photocatalysts, containing two or more semiconductors, exhibit better PHE rates than those with only one owing altered band alignment at interface stronger driving force for charge separation. Traditional binary metal sulfide (BMS)-based heterojunction such as CdS, MoS

Language: Английский

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Interfacial engineering of CoP/CoS2 heterostructure for efficiently electrocatalytic pH-universal hydrogen production

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 652, P. 989 - 996

Published: Aug. 23, 2023

Language: Английский

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RuO₂–CeO₂ Lattice Matching Strategy Enables Robust Water Oxidation Electrocatalysis in Acidic Media via Two Distinct Oxygen Evolution Mechanisms

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(5), P. 3298 - 3307

Published: Feb. 15, 2024

The discovery of acid-stable and highly active electrocatalysts for the oxygen evolution reaction (OER) is crucial in quest high-performance water-splitting technologies. Herein, a heterostructured RuO2–CeO2 electrocatalyst was constructed by using lattice-matching strategy. interfacial Ru–O–Ce bridge structure provided channel electron transfer between Ru Ce, creating lattice stress that distorts local RuO2. resulting catalyst exhibited attractive stability with negligible decay after 1000 h OER 0.5 M H2SO4, along high activity an overpotential only 180 mV at 10 mA cm–2. In situ attenuated total reflectance surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS), differential electrochemical mass spectrometry (DEMS), density functional theory (DFT) calculations were used to reveal interface noninterface RuO2 sites enabled oxide path mechanism (OPM) enhanced adsorbate (AEM-plus), respectively, during OER. simultaneous independent pathways accessible matching guides improved design acidic media.

Language: Английский

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Local Electronic Structure Modulation of Interfacial Oxygen Vacancies Promotes the Oxygen Activation Capacity of Pt/Ce_1–xM_xO_2−δ

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(8), P. 5936 - 5948

Published: April 3, 2024

The asymmetric oxygen vacancies on the surface of doped oxides and at interface between metal oxide are commonly regarded as real active sites for molecular activation reaction, owing to their unique electronic perturbation properties. However, essential rules modulating local structure promote capacity still ambiguous. In this work, a series interfacial vacancy sites, Pt/Ce–Ov–M (Ov, vacancy, M = Y, La, Pr, Nd), with different coordination environments were constructed based Pt/Ce0.95M0.05O2−δ materials. experimental data theoretical calculation results prove that site can capture electrons from Pt d-bands d- f-bands, acting an electron enrichment center. elevated d-band center upward Fermi level significantly boost transfer unoccupied π2p* orbital O2, achieving O2 through π-electron feedback mechanism. Remarkably, Pt/Ce–Ov–Y in Pt/Ce0.95Y0.05O2−δ highest delocalized density exhibited best behaviors catalytic activity aerobic oxidation 5-hydroxymethylfurfural. This work reveals over metal-oxide catalysts is highly dependent d/f-orbital valence-electron modulation, providing more insights into effect vacancy-localized performance.

Language: Английский

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Modulation of the electronic structure of CoP by surface and interface codoping boosts electrocatalytic oxygen evolution reaction

International Journal of Hydrogen Energy, Journal Year: 2023, Volume and Issue: 51, P. 914 - 921

Published: Nov. 20, 2023

Language: Английский

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Electron spin-states reconfiguration induced by alternating temperature gradient for boosting photocatalytic hydrogen evolution on hollow core-shell FeS2/CuCo2O4 Z-scheme heterostructure

Nano Energy, Journal Year: 2024, Volume and Issue: 124, P. 109483 - 109483

Published: March 11, 2024

Language: Английский

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Rational Design of Multiple Heterostructures with Synergistic Effect for Efficient and Stable Hydrogen Evolution Toward Industrial Alkaline Water Splitting

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(37)

Published: April 21, 2024

Abstract Electrocatalytic hydrogen evolution reaction (HER) via alkaline water splitting holds great promise for industrial clean production but is frustrated by limited catalytic activity and inferior stability under high current density. Elaborate manipulating of heterostructure on robust electrodes essential challenging accelerating HER kinetics with durability. Herein, a nickel mesh electrode, offering mechanical stability, directly engineered layers multiple heterostructures (r‐Mn–Ni/CoP) facile one‐pot electrodeposition followed surface reconstruction strategy. The abundant composed crystalline CoP, NiP, amorphous region, additional Mn doping considerably manipulate the electronic structure optimized charge transfer; while in situ surface‐reconstructed hydrophilic nanoflakes enable rapid wetting active sites to electrolyte. Consequently, r‐Mn–Ni/CoP requires only 134 mV overpotential at density 100 mA cm −2 , superior monophasic undoped samples, majority reported catalysts. Remarkably, an electrolyzer cathode demonstrates extraordinary voltage 1.734 V 300 stable operation 800 h. finding provides feasible strategy fabrication nonprecious‐metal‐based electrocatalysts toward electrolysis.

Language: Английский

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In Situ Reconstruction to Surface Sulfide Adsorbed Metal Scaffold for Enhanced Electrocatalytic Hydrogen Evolution Activity

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(23)

Published: March 26, 2024

Abstract Transition‐metal‐based compounds have been intensively explored as efficient electrocatalysts for hydrogen evolution reaction (HER). Feasible reconstruction to the real active sites, which is yet be identified, endows promotion of HER activity. Here, it reported that incoming S coordinates and anion vacancies prompt structural S‐doped Co 3 O 4 on carbon cloth (S‐Co /CC) during HER. A list in situ studies reveals sites are “metallic surface‐adparticles” system embracing metallic scaffold dilute coverage coordinated δ+ . Reaction mechanism exploration illustrates interfacial perimeters between moieties considerably facilitate adsorption H*, improve kinetics water dissociation, consequently promote The exemplified sulfide‐mediated topotactic transformation strategy extended preparation S, Fe codoped Ni(OH) 2 (S‐NiFe/CC) a bifunctional electrocatalyst. assembled exchange membrane electrolyzer achieves current density 1.0 cm −2 at 1.72 V, showing excellent capability catalyzing overall splitting ampere level. This study, feasible enables facile identify would inspire development other electrochemical hydrogenation reaction.

Language: Английский

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Iron, Tungsten Dual‐Doped Nickel Sulfide as Efficient Bifunctional Catalyst for Overall Water Splitting

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

Published: May 25, 2024

Developing low-cost and highly efficient bifunctional catalysts for both the oxygen evolution reaction (OER) hydrogen (HER) is a challenging problem in electrochemical overall water splitting. Here, iron, tungsten dual-doped nickel sulfide catalyst (Fe/W-Ni

Language: Английский

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Europium Oxide Evoked Multisite Synergism to Facilitate Water Dissociation for Alkaline Hydrogen Evolution

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

Published: July 2, 2024

Abstract Exploring an efficient nonnoble metal catalyst for hydrogen evolution reaction (HER) is critical industrial alkaline water electrolysis. However, it remains a great challenge due to the additional energy required H─OH bond cleavage and lack of enough H 2 O adsorption sites most catalysts. Herein, integration oxophilic Eu 3 with NiCo alloy evoked multisite synergism facilitate dissociation HER proposed. The optimized ‐NiCo exhibits excellent activity low overpotential only 60 mV at 10 mA cm −2 good electrochemical stability, which superior that ‐free comparable benchmark Pt/C. key roles on enhanced performance are identified by in situ Raman spectroscopy theoretical calculations. It discovered strong oxophilicity facilitates breakage bonding while evoking electron redistribution /NiCo interface accelerating Volmer step HER. Furthermore, obtained as both anode cathode displays overall water‐splitting stability 1.0 M KOH solution. believed this study provides important inspiration design high‐performance electrocatalysts toward based rare‐earth materials.

Language: Английский

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