Rare Metals, Год журнала: 2025, Номер unknown
Опубликована: Фев. 18, 2025
Язык: Английский
Nature Communications, Год журнала: 2024, Номер 15(1)
Опубликована: Март 29, 2024
Abstract Establishing appropriate metal-support interactions is imperative for acquiring efficient and corrosion-resistant catalysts water splitting. Herein, the interaction mechanism between Ru nanoparticles a series of titanium oxides, including TiO, Ti 4 O 7 TiO 2, designed via facile non-stoichiometric engineering systematically studied. 7, with unique band structure, high conductivity chemical stability, endows ingenious through interfacial Ti–O–Ru units, which stabilizes species during OER triggers hydrogen spillover to accelerate HER kinetics. As expected, Ru/Ti displays ultralow overpotentials 8 mV 150 long operation 500 h at 10 mA cm −2 in acidic media, expanded pH-universal environments. Benefitting from excellent bifunctional performance, proton exchange membrane anion electrolyzer assembled achieves superior performance robust operation. The work paves way energy conversion devices.
Язык: Английский
Процитировано
98
Microstructures, Год журнала: 2025, Номер 5(2)
Опубликована: Фев. 26, 2025
Developing efficient and economical electrocatalysts for hydrogen generation at high current densities is crucial advancing energy sustainability. Herein, a self-supported evolution reaction (HER) electrocatalyst rationally designed prepared on nickel foam through simple two-step chemical etching method, which consists of Pt quantum dots (PtQDs) coupled with nickel-iron layered double hydroxide (NiFe LDH) nanosheets (named PtQDs@NiFe LDH). The characterization results indicate that the introduction PtQDs induces more oxygen vacancies, thereby optimizing electronic structure LDH. This modification enhances conductivity accelerates adsorption/desorption kinetics intermediates in LDH, ultimately resulting exceptional catalytic performance HER large densities. Specifically, LDH delivers 500 2000 mA·cm-2 remarkably low overpotentials 92 252 mV, respectively, markedly outperforming commercial Pt/C (η500 = 190 η2000 436 mV). Moreover, when employing NiFe precursor catalyst as anode cathode, an overall water electrolysis system, only 1.66 V 2.02 are required to achieve mA·cm-2, while maintaining robust stability 200 h. study introduces feasible approach developing industrial-scale
Язык: Английский
Процитировано
1
Catalysis Letters, Год журнала: 2025, Номер 155(4)
Опубликована: Март 12, 2025
Язык: Английский
Процитировано
1
Journal of the American Chemical Society, Год журнала: 2025, Номер unknown
Опубликована: Апрель 17, 2025
Regulating the surface oxophilicity of electrocatalyst is known as an efficient strategy to mitigate order-of-magnitude kinetic slowdown hydrogen electrocatalysis in a base, which great scientific and technological significance. So far, its mechanistic origin remains mainly ascribed bifunctional or electronic effects that revolve around catalyst-intermediate interactions under extensive debate. In addition, understanding from perspective interfacial electric-double-layer (EDL) structures, should also strongly depend on electrode property, still lacking. Here, by decorating Pt with Mo, Ru, Rh, Au metal atoms tune systematically combining electrochemical activity tests, situ surface-enhanced infrared absorption spectroscopy, density functional theory calculation, ab initio molecular dynamics simulation, we found there exist consistent volcano-type relationships between *OH adsorption strength alkaline evolution activity, stretching/bending vibration information water, potential zero charge (PZC) electrode. This demonstrates impacting electrocatalytic lies modification toward PZC, thereby dictates electric field strength, rigidity, bonding network structure EDL ultimately governs proton transfer kinetics. These findings emphasize importance focusing interface structures understand property-dependent reaction
Язык: Английский
Процитировано
1
Chemical Engineering Journal, Год журнала: 2024, Номер 489, С. 151322 - 151322
Опубликована: Апрель 15, 2024
Язык: Английский
Процитировано
8
Colloids and Surfaces A Physicochemical and Engineering Aspects, Год журнала: 2024, Номер 696, С. 134278 - 134278
Опубликована: Май 18, 2024
Язык: Английский
Процитировано
7
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
1
Advanced Energy Materials, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 19, 2024
Abstract Electrocatalytic water splitting is an attractive approach for large‐scale hydrogen generation, critical global carbon neutrality. However, the prevalent commercialized alkaline electrolysis generally conducted at low current densities due to sluggish kinetics and high overpotential, severely hampering high‐efficiency production. Exploration of evolution reaction (HER) electrocatalysts that can reliably operate ampere‐level under overpotentials thus a primary challenge. In contrast extensive studies using powdery electrocatalysts, self‐supported metallic catalytic cathode has become burgeoning direction toward densities, owing their integrated design with intensive interfacial binding, conductivity mechanical stability industrial tolerance/adaption. Recent years have witnessed tremendous research advances in designing electrocatalysts. Therefore, this flourishing area specially summarized. Beginning introduction theory mechanism HER, engineering strategies on electrodes are systematically summarized, including metal alloy construction, heterostructure engineering, doping manipulation, surface design. Meanwhile, particular emphasis focused relationship between structure, activity, HER. Finally, existing challenges, requirements industrial‐scale application, future aiming provide better solution electrolysis.
Язык: Английский
Процитировано
5
Journal of Colloid and Interface Science, Год журнала: 2024, Номер 669, С. 856 - 863
Опубликована: Май 9, 2024
Язык: Английский
Процитировано
5
Chemical Engineering Journal, Год журнала: 2024, Номер 495, С. 153251 - 153251
Опубликована: Июнь 18, 2024
Язык: Английский
Процитировано
5