Rare Metals, Год журнала: 2024, Номер unknown
Опубликована: Окт. 5, 2024
Язык: Английский
National Science Review, Год журнала: 2024, Номер 11(10)
Опубликована: Июнь 3, 2024
Proton activity at the electrified interface is central to kinetics of proton-coupled electron transfer (PCET) reactions in electrocatalytic oxygen reduction reaction (ORR). Here, we construct an efficient Fe
Язык: Английский
Процитировано
30
Nature Communications, Год журнала: 2025, Номер 16(1)
Опубликована: Фев. 17, 2025
Ruthenium dioxide electrocatalysts for acidic oxygen evolution reaction suffer from mediocre activity and rather instability induced by high ruthenium-oxygen covalency. Here, the tensile strained strontium tantalum codoped ruthenium nanocatalysts are synthesized via a molten salt-assisted quenching strategy. The spacially elongates bond reduces covalency, thereby inhibiting lattice participation structural decomposition. synergistic electronic modulations among strontium-tantalum-ruthenium groups both optimize deprotonation on sites intermediates absorption sites, lowering energy barrier. Those result in well-balanced activity-stability profile, confirmed comprehensive experimental theoretical analyses. Our electrode demonstrates an overpotential of 166 mV at 10 mA cm−2 0.5 M H2SO4 order magnitude higher S-number, indicating comparable stability compared to bare catalyst. It exhibits negligible degradation rates within long-term operation single cell PEM electrolyzer. This study elucidates effectiveness strain strategic doping enhancing ruthenium-based catalysts reactions. poor due authors report dopants improving stability.
Язык: Английский
Процитировано
6
ChemPlusChem, Год журнала: 2024, Номер 89(11)
Опубликована: Июль 16, 2024
Abstract The two‐electron oxygen reduction reaction (2e‐ORR) for the sustainable synthesis of hydrogen peroxide (H 2 O ) has demonstrated considerable potential local production this environmentally friendly chemical oxidant on small, medium, and large scales. This method offers a promising alternative to energy‐intensive anthraquinone approach, placing primary emphasis development efficient electrocatalysts. Improving efficiency electrocatalysts uncovering their catalytic mechanisms are essential steps in achieving high 2e‐ORR activity, selectivity, stability. comprehensive review summarizes recent advancements in‐situ H production, providing detailed overview field. In particular, delves into design, fabrication, investigation active sites contributing selectivity. Additionally, it highlights range including pure metals alloys, transition metal compounds, single‐atom catalysts, carbon‐based catalysts pathway. Finally, addresses significant challenges opportunities electrosynthesis, as well future research directions.
Язык: Английский
Процитировано
9
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 22, 2025
Abstract Alloying atomically dispersed noble metals with earth‐abundant transition metal nanoparticles (NPs) presents a promising approach to enhance the hydrogen evolution reaction (HER) and oxygen (OER) in water electrolysis. However, challenge remains of reducing size NPs without sacrificing high activity durability. In this study, Ru–Co 2 Ni nanoalloy particles (NAPs) encapsulated nitrogen‐doped carbon nanotubes (NCNTs) are introduced, forming core‐shell electrocatalyst (Ru–Co Ni@NCNT). This design leverages Ru site optimization, CNT density control, strain engineering, efficient dissociation, outstanding bubble release dynamics within structure. These factors significantly improve catalytic performance low overpotentials 35 57 mV overpotential 1.0 m KOH 0.5 H SO 4 solutions, respectively, at current 10 mA cm −2 . Density functional theory (DFT) calculations reveal that while sites serve as active sites, they also modify electronic structure Co Ni, optimizing their adsorption energies improving HER efficiency. The Ni@NCNT catalyst is successfully integrated into both anion exchange membrane (AEM) proton (PEM) electrolyzers, demonstrating stable operation A for 500 h, underscoring its potential durable production.
Язык: Английский
Процитировано
1
ACS Applied Nano Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 29, 2025
Язык: Английский
Процитировано
1
Advanced Materials, Год журнала: 2025, Номер unknown
Опубликована: Март 4, 2025
Abstract Proton exchange membrane water electrolysis (PEMWE) represents a promising technology for renewable hydrogen production. However, the large‐scale commercialization of PEMWE faces challenges due to need acid oxygen evolution reaction (OER) catalysts with long‐term stability and corrosion‐resistant electrode assemblies (MEA). This review thoroughly examines deactivation mechanisms acidic OER crucial factors affecting assembly instability in complex environments, including catalyst degradation, dynamic behavior at MEA triple‐phase boundary, equipment failures. Targeted solutions are proposed, improvements, optimized designs, operational strategies. Finally, highlights perspectives on strict activity/stability evaluation standards, situ/operando characteristics, practical electrolyzer optimization. These insights emphasize interrelationship between catalysts, MEAs, activity, stability, offering new guidance accelerating systems.
Язык: Английский
Процитировано
1
Carbon Neutralization, Год журнала: 2025, Номер 4(2)
Опубликована: Март 1, 2025
ABSTRACT The fine‐tuning of the electronic structure and local environment surrounding atomically dispersed metal centers is crucial in catalysis but remains a grand challenge that requires in‐depth exploration. In this study, Ir species were incorporated into series UiO‐type metal−organic frameworks via strong metal–support interactions (SMSI), their state was precisely modulated by regulating metal‐oxo clusters (Ce, Zr, Hf) organic ligands (BDC‐X, where X = ‐H, ‐NH 2 , ‐Me, or ‐NO ) for enhancing catalytic performance dicyclopentadiene (DCPD) hydrogenation. optimized Ir@Ce‐UiO‐66‐NO effectively transforms DCPD tetrahydrodicyclopentadiene (THDCPD), giving 100% conversion over 99% THDCPD selectivity, far superior to corresponding counterparts. Experimental theoretical results jointly demonstrated Ce‐oxo with unique Ce III /Ce IV redox pairs can facilitate electron transfer species. Furthermore, electron‐withdrawing groups play role increasing ratio, promoting efficient uptake MOF support leading low density around species, which enhances stronger between substrate molecules active sites contributes excellent activity. findings presented work provide valuable insights rational design advanced heterogeneous catalysts leveraging properties modulation capabilities supports.
Язык: Английский
Процитировано
1
Transactions of Tianjin University, Год журнала: 2024, Номер 30(5), С. 395 - 405
Опубликована: Авг. 1, 2024
Язык: Английский
Процитировано
7
Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 358, С. 124382 - 124382
Опубликована: Июль 6, 2024
Язык: Английский
Процитировано
5
ACS Energy Letters, Год журнала: 2024, Номер unknown, С. 5064 - 5073
Опубликована: Сен. 25, 2024
Язык: Английский
Процитировано
5