Rare Metals, Год журнала: 2024, Номер unknown
Опубликована: Окт. 5, 2024
Язык: Английский
Journal of the American Chemical Society, Год журнала: 2025, Номер 147(9), С. 7993 - 8003
Опубликована: Фев. 19, 2025
The structure-dependent transition in reaction pathways during acidic oxygen evolution (OER) is pivotal due to the active site oxidation accompanied by coordination environment changes. In this work, charge-polarized Ir-O-Co units are constructed alkali metal cobalt oxides (LiCoO2, and Na0.74CoO2) modify lower Hubbard band. Benefiting from accelerated delithiation reconstruction induced altered band structure, typical Ir-LiCoO2 produces high-valent Ir sites with unsaturated through charge compensation OER. Oxygen atoms shared trimetallic exhibit strong Bro̷nsted acidity, promoting proton migration for dynamically enhancing deprotonation. Furthermore, stable environment, along electron donation Co sites, significantly improves stability of sites. unique electrochemical activation results a low overpotential 190 mV at 10 mA cm-2 OER delivers exceptional 1 A 150 h slight voltage degradation exchange membrane electrolyzer. This work provides in-depth insights into relationship between catalyst mechanisms.
Язык: Английский
Процитировано
0
Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 179719 - 179719
Опубликована: Март 1, 2025
Язык: Английский
Процитировано
0
ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown
Опубликована: Март 19, 2025
The development of efficient and reliable acidic oxygen evolution reaction (OER) electrocatalysts represents a crucial step in the process water electrolysis. RuO2, benchmark OER catalyst, suffers from limited large-scale applicability due to its tendency toward less stable lattice mechanism (LOM). This work reports synthesis Co-doped RuO2 nanosheets with unique porous morphology composed interconnected grains via facile molten salt method. Co doping modulates grain size, effectively increasing specific surface area introducing vacancies. These vacancies, coupled dopants, form Co-O(V) motifs that tune electronic configuration Ru. structural engineering promotes shift detrimental LOM pathway more adsorbate (AEM), significantly enhancing stability matrix environments. optimized Co0.108-RuO2 catalyst exhibits low overpotential 214 mV at 10 mA cm-2 remarkable over commercial undoped counterparts, owing synergistic effect increased area, motifs, favored AEM pathway. strategy utilizing engineer morphology, structure, offers promising avenue for developing high-performance electrocatalysts.
Язык: Английский
Процитировано
0
ACS Applied Energy Materials, Год журнала: 2025, Номер unknown
Опубликована: Апрель 8, 2025
Язык: Английский
Процитировано
0
Advanced Sustainable Systems, Год журнала: 2025, Номер unknown
Опубликована: Апрель 10, 2025
Abstract Hydrogen production by electrochemical water splitting is considered to be a key strategic energy technology, and proton exchange membrane electrolyzers (PEMWEs) anion (AEMWEs) are ideal technologies for green hydrogen in recent years. However, PEMWEs AEMWEs lack low‐cost high‐performance acidic oxygen evolution reaction (OER) alkaline (HER) electrocatalysts respectively, limiting their large‐scale development. Recently, ruthenium (Ru)‐based have received lot of attention because activity better than that commercial catalysts price more affordable, showing great potential OER HER. there still obstacles Ru‐based practical applications industrial electrolyzers, regulatory strategies need developed further optimize its performance. Herein, comprehensive review presented concerning it. First, fundamental principles focus the basic content application discussed. Then, summarized, providing detailed analysis elucidate mechanisms, properties, electrolyzers. Finally, outlooks prospects challenges future proposed.
Язык: Английский
Процитировано
0
Journal of Power Sources, Год журнала: 2025, Номер 644, С. 237084 - 237084
Опубликована: Апрель 19, 2025
Язык: Английский
Процитировано
0
Electrochimica Acta, Год журнала: 2025, Номер 530, С. 146398 - 146398
Опубликована: Май 5, 2025
Язык: Английский
Процитировано
0
Journal of Materials Chemistry A, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
This review surveys recent advances in Ru-based electrocatalysts for the acidic OER, focusing on strategies to enhance activity and stability, mitigate Ru dissolution performance degradation, inform design of robust PEMWE.
Язык: Английский
Процитировано
0
AIChE Journal, Год журнала: 2025, Номер unknown
Опубликована: Май 20, 2025
Abstract Maximizing the atom efficiency of noble metal species is crucial for their application, but directly reducing size down to single atoms (SAs) limited when facing complex situations requiring simultaneous adsorption and activation multiple reactants. Herein, Schiff base condensation 1,3,5‐tris(4‐aminophenyl)benzene 2,5‐dibromoterephthalaldehyde offered a Br‐tethered covalent organic framework (COF) TAPB‐DBDH co‐loading ruthenium (Ru) SAs nanoparticles (NPs). We demonstrated triadic synergism Ru (Ru–C 3 N 1 ), NPs, in reductive aminations carbonyl compounds with ammonia hydrogen primary amines, showing high yield, large turnover number, frequency, stable recycling, broad substrate compatibility. A systematic theoretic experimental study revealed that cooperation provided strong affinity toward compound imine intermediate promote conversion, while co‐existed NPs lowered energy barrier H 2 cleavage.
Язык: Английский
Процитировано
0
Advanced Functional Materials, Год журнала: 2024, Номер unknown
Опубликована: Авг. 24, 2024
Abstract The Volmer step is considered to play a critical role in the alkaline hydrogen oxidation reaction (HOR) process. However, current research mainly focuses on optimizing adsorption strength of H ads and OH , while importance maximizing interfaces with different adsorbates rarely addressed. Herein, multi‐strategy approach explored by simultaneously incorporating Zn single atoms into Ru lattice carbon support (denoted as (Zn 1 Ru) SAA /Zn ‐N‐C) construct high activity stable HOR catalyst. This novel catalyst achieves an impressive mass up 4.98 mA µg −1 at 50 mV, which surpasses that Ru/N‐C 1.9 times even Pt/C 7.5 times. In addition, has superior long‐term stability CO resistance. Experimental results theoretical calculations reveal unique structure ‐N‐C not only enhances (Ru nanoparticles)‐support interaction, it facilitates electron transfer between support, further optimizes behavior various intermediates, but also forms distinct micro‐regions adsorbed (*H) (*OH) nanoparticle surface, thereby promoting provides new understanding complex design advanced catalysts.
Язык: Английский
Процитировано
3