Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(26), С. 15781 - 15791
Опубликована: Янв. 1, 2024
The macropores within carbon skeleton-supported FeSe 2 /NiSe derived from MOF assemblies are meticulously engineered at the micrometer scale and OER electrocatalytic performance exhibits a significant dependence on micrometer-scale dimensions.
Язык: Английский
Nature Communications, Год журнала: 2024, Номер 15(1)
Опубликована: Июль 8, 2024
Abstract Anion exchange membrane (AEM) water electrolysis employing non-precious metal electrocatalysts is a promising strategy for achieving sustainable hydrogen production. However, it still suffers from many challenges, including sluggish alkaline evolution reaction (HER) kinetics, insufficient activity and limited lifetime of ampere-level-current-density HER. Here, we report an efficient HER at industrial-level current density wherein flexible WS 2 superstructure designed to serve as the cathode catalyst AEM electrolysis. The features bond-free van der Waals interaction among low Young’s modulus nanosheets ensure excellent mechanical flexibility, well stepped edge defect structure realize high catalytic favorable interface micro-environment. unique can effectively withstand impact high-density gas-liquid exchanges facilitate mass transfer, endowing long-term durability under industrial-scale density. An electrolyser containing this exhibits cell voltage 1.70 V deliver constant 1 A cm −2 over 1000 h with negligible decay rate 9.67 μV −1 .
Язык: Английский
Процитировано
34
Carbon Neutralization, Год журнала: 2024, Номер 3(2), С. 172 - 198
Опубликована: Фев. 26, 2024
Abstract Water splitting is a critical process for the production of green hydrogen, contributing to advancement circular economy. However, application water devices on large scale primarily impeded by sluggish oxygen evolution reaction (OER) at anode. Thus, developing and designing efficient OER catalysts significant target. NiFe‐based are extensively researched as excellent electrocatalysts due their affordability, abundant reserves, intrinsic activities. they still suffer from long‐term stability challenges. To date, few systematic strategies improving durability have been reported. In this review, various advanced introduced. Moreover, challenges in alkaline media, including iron segregation, structural degradation, peeling substrate summarized. More importantly, enhance highlighted opportunities discussed facilitate future studies electrolysis. This review presents design strategy anion exchange membrane (AEM) electrolyzers overcome OER, which also emphasizes importance media its significance achieving large‐scale commercialization.
Язык: Английский
Процитировано
30
ACS Materials Letters, Год журнала: 2024, Номер 6(5), С. 1678 - 1685
Опубликована: Март 27, 2024
The slow kinetics of the alkaline hydrogen evolution reaction (HER) and oxidation (HOR) must be upgraded to achieve a renewable cycle. Transition metal phosphides transition carbides exhibit excellent activity toward diverse catalytic reactions. synthesis MoP-Mo2C heterogeneous nanoparticles coated with porous carbon network (MoP-Mo2C/C) via one-step heat treatment was reported, which exhibited low overpotential at 10 mA cm–2 (102.1 mV), Tafel slope (53.1 mV dec–1), stability (96 h) for HER. In addition, MoP-Mo2C/C performance HOR, an exchange current density 1.40 cm–2. Density functional theory simulations indicated that electronic structure optimized, its Gibbs free energy approximately zero, is origin fast kinetics. This work provides promising strategy designing high-performance bifunctional electrocatalysts.
Язык: Английский
Процитировано
28
Advanced Functional Materials, Год журнала: 2024, Номер 34(34)
Опубликована: Март 12, 2024
Abstract Alkaline water electrolysis is among the most promising technologies to massively produce green hydrogen. Developing highly‐active and durable electrodes catalyze oxygen evolution reaction (OER) hydrogen (HER) of primary importance. Here a facile, room‐temperature synthetic route presented access heazlewoodite phase (Ni, Fe) 3 S 2 nanosheet arrays supported on NiFe foam (NFF), whose production can be easily scaled up meter size per batch operation. The /NFF electrode serve as high‐performance electrocatalyst for both HER OER in alkaline media, remains highly stable over 1000 h at 100 mA cm −2 current densities. When working electrocatalyst, confirmed catalytic that provides high density efficient active sites (e.g., Ni─Ni Ni─Fe bridge sites). During electrochemical testing, nanosheets totally transform into γ ‐(Fe, Ni)OOH OER. As consequence, used integrate an electrolyzer cathode anode, give excellent performance (600 @1.93 V), which better than based commercial Raney Ni electrodes.
Язык: Английский
Процитировано
22
Small, Год журнала: 2024, Номер 20(27)
Опубликована: Янв. 28, 2024
Low-cost bifunctional electrocatalysts capable of efficiently driving the hydrogen evolution reaction (HER) and oxygen (OER) are needed for growth a green economy. Herein, Ru/Co
Язык: Английский
Процитировано
17
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 10, 2025
Abstract Developing overall water splitting non‐noble metal electrocatalysts achieving long‐term stability with high activity at industrial‐grade current density remains challenging. Herein, a self‐reconstruction strategy of Co 9 S 8 ‐Ni 3 2 /NCF is employed to fabricate Ni x 3‐x O 4 ‐Ov‐ in which partial replaced by the structure. The reconstructed ‐Ov can enhance adsorbing ability leached from initial phase compared spinel, exceeding 1000‐h oxygen evolution reaction (OER) and 600‐h 1000 mA cm −2 excellent activity. In situ Raman X‐ray photoelectron spectroscopy (XPS) results indicate that substitution for atoms enhances adsorption capacity on ‐Ov, facilitating formation high‐density 3+ active sites (400) expedited interfacial electron transfer densities. Density functional theory (DFT) calculations reveal stabilizes surface vacancies optimizes energy intermediates, thereby improving both catalytic performance. findings provide new insights into overcoming activity‐stability trade‐off contribute design
Язык: Английский
Процитировано
4
Advanced Energy Materials, Год журнала: 2025, Номер unknown
Опубликована: Фев. 10, 2025
Abstract Designing heterogeneous interface to enhance the kinetics for electrocatalysts is a highly efficient but challenging pathway toward hydrogen evolution reaction (HER) in water electrolysis. Herein, coupling of CeO 2 quantum dots onto porous Ru aerogel through interfacial Ru‐O‐Ce bridge proposed construct ‐Ru as superior HER electrocatalyst with ultra‐low overpotentials. In situ characterizations and theoretical calculations reveal electron distribution at boost bonding sites, faster adsorption dissociation sites kinetics. Furthermore, employed excellent cathodes both acidic alkaline electrolyzers ampere‐level current density stably operated over 500 hours. Thus, synergistic effect tunes catalytic mechanism reinforces activity, realizing generation
Язык: Английский
Процитировано
2
Inorganic Chemistry Frontiers, Год журнала: 2024, Номер 11(14), С. 4080 - 4106
Опубликована: Янв. 1, 2024
This summary describes the effects of wettability, local pH, interfacial water structure, and electrolyte composition on interface reactant compositions, key intermediate adsorption, reaction kinetics.
Язык: Английский
Процитировано
14
DeCarbon, Год журнала: 2024, Номер 5, С. 100062 - 100062
Опубликована: Июль 14, 2024
Within the framework of achieving global carbon neutrality, utilizing electrocatalytic water splitting to produce "green hydrogen" holds significant promise as an effective solution. The strategic development economic, efficient, and robust anode oxygen evolution reaction (OER) catalysts is one imminent bottlenecks for scalable application electrolyzing into hydrogen oxygen, particularly under actual yet harsh operating conditions such large current density (LCD). In this review, we intend summarize advances challenges in understanding OER at LCD. Initially, impact LCD on electron transfer, mass transportation efficiency catalyst stability identified summarized. Furthermore, five basic principles design, namely dimension materials, surface chemistry, creation transfer pathways, synergy among nano-, micro-, macroscale structures, catalyst-support interaction, are systematically discussed. Specifically, correlation between synergistic function multiscale structures interaction highlighted direct improvements durability Finally, outlook prospected further our these topics provide related researchers with potential research areas.
Язык: Английский
Процитировано
14
Catalysts, Год журнала: 2024, Номер 14(4), С. 254 - 254
Опубликована: Апрель 11, 2024
Water splitting is widely acknowledged as an efficient method for hydrogen production. In recent years, significant research efforts have been directed towards developing cost-effective electrocatalysts. However, the management of bubbles formed on electrode surface during electrolysis has largely overlooked. These can impede active sites, resulting in decreased catalytic performance and stability, especially at high current densities. Consequently, this impediment affects energy conversion efficiency water splitting. To address these challenges, review offers a comprehensive overview advanced strategies aimed improving mitigating obstructive effects primarily involve utilization experimental apparatus to observe bubble-growth behavior, encompassing nucleation, growth, detachment stages. Moreover, examines factors influencing bubble formation, considering both mechanical behaviors internal factors. Additionally, design water-splitting catalysts discussed, focusing modifying electrode-surface characteristics. Finally, concludes by summarizing potential large-scale industrial production identifying future directions achieving
Язык: Английский
Процитировано
12