Chemical Engineering Journal, Год журнала: 2024, Номер 487, С. 150253 - 150253
Опубликована: Март 8, 2024
Язык: Английский
Chemical Engineering Journal, Год журнала: 2024, Номер 487, С. 150253 - 150253
Опубликована: Март 8, 2024
Язык: Английский
Advanced Materials, Год журнала: 2023, Номер 36(11)
Опубликована: Дек. 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
Язык: Английский
Процитировано
98Journal of Colloid and Interface Science, Год журнала: 2023, Номер 652, С. 989 - 996
Опубликована: Авг. 23, 2023
Язык: Английский
Процитировано
76ACS Catalysis, Год журнала: 2024, Номер 14(5), С. 3298 - 3307
Опубликована: Фев. 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.
Язык: Английский
Процитировано
69ACS Catalysis, Год журнала: 2024, Номер 14(8), С. 5936 - 5948
Опубликована: Апрель 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.
Язык: Английский
Процитировано
51International Journal of Hydrogen Energy, Год журнала: 2023, Номер 51, С. 914 - 921
Опубликована: Ноя. 20, 2023
Язык: Английский
Процитировано
50Nano Energy, Год журнала: 2024, Номер 124, С. 109483 - 109483
Опубликована: Март 11, 2024
Язык: Английский
Процитировано
39Advanced Functional Materials, Год журнала: 2024, Номер 34(37)
Опубликована: Апрель 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.
Язык: Английский
Процитировано
33Advanced Energy Materials, Год журнала: 2024, Номер 14(23)
Опубликована: Март 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.
Язык: Английский
Процитировано
31Small, Год журнала: 2024, Номер unknown
Опубликована: Май 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
Язык: Английский
Процитировано
23Advanced Functional Materials, Год журнала: 2024, Номер unknown
Опубликована: Июль 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.
Язык: Английский
Процитировано
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