Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 365, С. 124932 - 124932
Опубликована: Дек. 11, 2024
Язык: Английский
Journal of the American Chemical Society, Год журнала: 2024, Номер 146(46), С. 32049 - 32058
Опубликована: Ноя. 12, 2024
The advancement of acid-stable oxygen evolution reaction (OER) electrocatalysts is crucial for efficient hydrogen production through proton exchange membrane (PEM) water electrolysis. Unfortunately, the activity constrained by a linear scaling relationship in adsorbed mechanism, while lattice-oxygen-mediated mechanism undermines stability. Here, we propose heterogeneous dual-site oxide pathway (OPM) that avoids these limitations direct dioxygen radical coupling. A combination Lewis acid (Cr) and Ru to form solid solution oxides (Cr
Язык: Английский
Процитировано
29
Nature Communications, Год журнала: 2024, Номер 15(1)
Опубликована: Сен. 16, 2024
The microscopic reaction pathway plays a crucial role in determining the electrochemical performance. However, artificially manipulating still faces considerable challenges. In this study, we focus on classical acidic water oxidation based RuO
Язык: Английский
Процитировано
25
Advanced Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 15, 2025
Abstract Oxygen evolution reaction (OER) is a cornerstone of various electrochemical energy conversion and storage systems, including water splitting, CO 2 /N reduction, reversible fuel cells, rechargeable metal‐air batteries. OER typically proceeds through three primary mechanisms: adsorbate mechanism (AEM), lattice oxygen oxidation (LOM), oxide path (OPM). Unlike AEM LOM, the OPM via direct oxygen–oxygen radical coupling that can bypass linear scaling relationships intermediates in avoid catalyst structural collapse thereby enabling enhanced catalytic activity stability. Despite its unique advantage, electrocatalysts drive remain nascent are increasingly recognized as critical. This review discusses recent advances OPM‐based electrocatalysts. It starts by analyzing mechanisms guide design Then, several types novel materials, atomic ensembles, metal oxides, perovskite molecular complexes, highlighted. Afterward, operando characterization techniques used to monitor dynamic active sites examined. The concludes discussing research directions advance toward practical applications.
Язык: Английский
Процитировано
13
Advanced Materials, Год журнала: 2024, Номер unknown
Опубликована: Авг. 7, 2024
Abstract The design of a low‐iridium‐loading anode catalyst layer with high activity and durability is key challenge for proton exchange membrane water electrolyzer (PEMWE). Here, the synthesis novel supported IrO 2 nanocatalyst tri‐layered structure, dubbed @TaO x @TaB that composed ultrasmall nanoparticles anchored on amorphous TaO overlayer TaB nanorods reported. composite electrocatalyst shows great stability toward oxygen evolution reaction (OER) in acid, thanks to its dual‐interface structural feature. electronic interaction /TaO interface can regulate coverage surface hydroxyl groups, Ir 3+ / 4+ ratio, redox peak potential enhancing OER activity, while dense prevent further oxidation substrate stabilize catalytic layers improving during OER. be used fabricate an PEMWE iridium‐loading as low 0.26 mg cm −2 . delivers current densities at cell voltages (e.g., 3.9 A @2.0 V), gives excellent retention more than 1500 h 2.0 density.
Язык: Английский
Процитировано
15
ACS Nano, Год журнала: 2024, Номер unknown
Опубликована: Дек. 13, 2024
Suppressing the lithium polysulfide (LiPS) shuttling as well accelerating conversion kinetics is extremely crucial yet challenging in designing sulfur hosts for lithium–sulfur (Li–S) batteries. Phase engineering of nanomaterials an intriguing approach tuning electronic structure toward regulating phase-dependent physicochemical properties. In this study, a metastable phase δ-Mo2C catalyst was elaborately synthesized via boron doping strategy, which exhibited transfer from hexagonal to cubic structure. The hierarchical tubular δ-Mo2C-decorated N-doped carbon nanotube (δ-B-Mo2C/NCNT) endows fast electron and abundant polar sites LiPSs. First-principles calculations reveal strengthened chemical adsorption capability hybridization between d orbital Mo metal p S atoms LiPSs, contributing higher electrocatalytic activity. Moreover, situ Raman analysis manifests accelerated redox kinetics. Consequently, δ-B-Mo2C/NCNT renders Li–S battery with high specific capacity 1385.6 mAh g–1 at 0.1 C superior rate property 606.3 4 C. Impressively, satisfactory areal 6.95 cm–2 achieved under loading 6.8 mg cm–2. This work has gained research significance design
Язык: Английский
Процитировано
15
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 8, 2025
Abstract Oxygen vacancy (V O ) engineering is widely regarded as a key strategy for enhancing CoMo‐based catalysts oxygen evolution reaction (OER) while understanding their formation mechanisms and role in boosting OER activity remains significant challenge. Herein, CoMoO x system doped developed with different 3 d ‐orbital atoms M (V, Ni, Zn, Mn) to investigate the construction stabilization of V its crucial performance. In situ ex measurements along theoretical calculations demonstrate that doping adjusts bandgap between CoMo‐ ‐p orbitals, leading transfer electrons from O‐ p orbitals M‐ thereby promoting . The leads an upshifted ‐band center, optimizing desorption intermediates on ‐CoMoVO lowering energy barrier rate‐determining step (RDS), catalyst's activity. Additionally, promotes electron Co atoms, stabilizing ultimately improving stability. resulting catalyst delivered attractive (overpotential 248 mV at 10 mA cm −2 durability over 600 h. This study offers rational method designing efficient electrocatalysts.
Язык: Английский
Процитировано
2
ACS Catalysis, Год журнала: 2025, Номер unknown, С. 7403 - 7413
Опубликована: Апрель 20, 2025
Язык: Английский
Процитировано
1
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Апрель 7, 2025
Abstract Cerium oxide has emerged as a crucial promoter for regulating the electrocatalytic oxygen evolution reaction (OER) performance of other active components; however, mechanism underlying its intrinsic activity remains poorly understood. Herein, novel self‐supported coral‐like Ce 2 W O 9 array is synthesized on carbon cloth using simple ion‐exchange method. The in situ electrochemical surface reconstruction facilitated formation defects, which effectively altered local bonding environment atoms. Based advanced characterization techniques and theoretical calculations, it concluded that optimized centers served sites, substantially reducing energy barrier potential‐determining step ( * OOH formation), turn, facilitating generation boosting activity. Consequently, reconstructed electrode exhibited an exceptionally low overpotential 351 mV at 100 mA cm −2 1 m KOH, while maintaining remarkable stability over 000 h 20 . This study provides valuable insights into mechanistic understanding strategic design rare‐earth oxide‐based electrocatalysts.
Язык: Английский
Процитировано
1
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
0
Chemical Science, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Free energy, together with the coverage of intermediate states, can scale effect ferroelectric polarization on photoelectrocatalytic performance during different dynamic pathways oxygen evolution reaction.
Язык: Английский
Процитировано
0