Journal of Energy Chemistry, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Язык: Английский
Journal of the American Chemical Society, Год журнала: 2024, Номер 146(10), С. 6846 - 6855
Опубликована: Фев. 29, 2024
This investigation probes the intricate interplay of catalyst dynamics and reaction pathways during oxygen evolution (OER), highlighting significance atomic-level local ligand structure insights in crafting highly active electrocatalysts. Leveraging a tailored ion exchange followed by electrochemical dynamic reconstruction, we engineered novel catalytic featuring single Ir atoms anchored to NiOOH (Ir1@NiOOH). approach involved strategic replacement Fe with Ir, facilitating transition selenide precatalysts into (oxy)hydroxides. elemental substitution promoted an upward shift O 2p band intensified metal–oxygen covalency, thereby altering OER mechanism toward enhanced activity. The from single-metal site (SMSM) dual-metal-site (DMSM) Ir1@NiOOH was substantiated situ differential mass spectrometry (DEMS) supported theoretical insights. Remarkably, electrode exhibited exceptional electrocatalytic performance, achieving overpotentials as low 142 308 mV at current densities 10 1000 mA cm–2, respectively, setting new benchmark for electrocatalysis OER.
Язык: Английский
Процитировано
104
Nature Communications, Год журнала: 2024, Номер 15(1)
Опубликована: Июнь 11, 2024
Abstract Precisely modulating the Ru-O covalency in RuO x for enhanced stability proton exchange membrane water electrolysis is highly desired. However, transition metals with d -valence electrons, which were doped into or alloyed , are inherently susceptible to influence of coordination environment, making it challenging modulate a precise and continuous manner. Here, we first deduce that introduction lanthanide gradually changing electronic configurations can continuously owing shielding effect 5 s /5 p orbitals. Theoretical calculations confirm durability Ln-RuO following volcanic trend as function covalency. Among various Er-RuO identified optimal catalyst possesses 35.5 times higher than 2 . Particularly, -based device requires only 1.837 V reach 3 A cm −2 shows long-term at 500 mA 100 h degradation rate mere 37 μV −1
Язык: Английский
Процитировано
87
Advanced Science, Год журнала: 2024, Номер 11(21)
Опубликована: Март 19, 2024
Abstract The generation of green hydrogen by water splitting is identified as a key strategic energy technology, and proton exchange membrane electrolysis (PEMWE) one the desirable technologies for converting renewable sources into hydrogen. However, harsh anode environment PEMWE oxygen evolution reaction (OER) involving four‐electron transfer result in large overpotential, which limits overall efficiency production, thus efficient electrocatalysts are needed to overcome high overpotential slow kinetic process. In recent years, noble metal‐based (e.g., Ru/Ir‐based metal/oxide electrocatalysts) have received much attention due their unique catalytic properties, already become dominant acidic OER process applied commercial devices. these still face thorny problem conflicting performance cost. this review, first, metal briefly classified according forms existence, mechanisms outlined. Then, focus on summarizing improvement strategies with respect activity stability over years. Finally, challenges development prospects discussed.
Язык: Английский
Процитировано
78
ACS 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
75
Advanced Functional Materials, Год журнала: 2024, Номер 34(32)
Опубликована: Март 25, 2024
Abstract Understanding of fundamental mechanism and kinetics the oxygen evolution reaction (OER) is pivotal for designing efficient OER electrocatalysts owing to its key role in electrochemical energy conversion devices. In past few years, lattice oxidation (LOM) arising from anodic redox chemistry has attracted significant attention as it involves a direct O─O coupling thus bypasses thermodynamic limitations traditional adsorbate (AEM). Transition metal‐based oxyhydroxides are generally acknowledged real catalytic phase alkaline media. particular, their low‐dimensional layered structures offer sufficient structural flexibility trigger LOM. Herein, comprehensive overview provided recent advances anion LOM‐based electrocatalysts. Based on analyses electronic structure LOM, strategy proposed activate Possible identification techniques corroboration also reviewed. addition, reconstruction process induced by LOM focused importance multiple situ/operando characterizations highlighted unveil chemical origins To conclude, prospect remaining challenges future opportunities presented.
Язык: Английский
Процитировано
59
Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(15), С. 8796 - 8804
Опубликована: Янв. 1, 2024
The development of non-precious metal electrocatalysts for acidic oxygen evolution reaction (OER) that are highly durable, cost-effective, and efficient is crucial to advancing the use proton exchange membrane water electrolyzers (PEMWEs).
Язык: Английский
Процитировано
50
Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(36)
Опубликована: Июнь 15, 2024
Although Ru-based materials are among the outstanding catalysts for oxygen evolution reaction (OER), instability issue still haunts them and impedes widespread application. The of OER is generally ascribed to formation soluble species through over-oxidation Ru structural decomposition caused by involvement lattice oxygen. Herein, an effective strategy selectively activating around site proposed improve activity stability. Our synthesized spinel-type electrocatalyst Zn co-doped Co
Язык: Английский
Процитировано
38
Progress in Materials Science, Год журнала: 2024, Номер 145, С. 101294 - 101294
Опубликована: Апрель 5, 2024
Язык: Английский
Процитировано
33
Nano Research, Год журнала: 2024, Номер 17(5), С. 3902 - 3910
Опубликована: Янв. 12, 2024
Язык: Английский
Процитировано
29
Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(30), С. 18832 - 18865
Опубликована: Янв. 1, 2024
This review focuses mainly on the overall facilitating effect of heterostructures OER process. The fabrication heterostructured electrocatalysts and relationship between their structures electrocatalytic properties are discussed.
Язык: Английский
Процитировано
27