Achieving Highly Active A-Site Cation-Deficient Perovskite Electrocatalysts Operated at Large Current Density Toward Hydrogen Evolution Reaction DOI
Xiaoxu Yang, Tian Xia, Qiang Li

и другие.

Опубликована: Янв. 1, 2023

A-site cation-deficient strategy is proposed to develop highly active perovskite electrocatalysts toward hydrogen evolution reaction (HER). Herein, La and Ba co-deficient (LaBa)1-xCo2O5+δ perovskites are evaluated as the potential catalysts, demonstrating desirable HER performance in alkaline media. Noticeably, (LaBa)0.95Co2O5+δ (LBCO-95) component exhibits an overpotential of ca. -415 mV at a large current density 1000 mA cm-2 disk, along with extremely steady operation during continuous process. Furthermore, Tafel slope (-47.4 dec-1) LB-95 considerable that state-of-the-art Pt/C benchmark (-25.2 dec-1). This activity may be attributed moderate Co valence state strong affinity H2O species. As for realistic water electrolysis, Ni foam (NF)-supported electrolyzer LBCO-95 cathode NiFe-layered double hydroxide (NiFe-LDH) anode delivers 500 disk 1.97 V, which surpasses classic IrO2 couple.

Язык: Английский

Enhancing the mechanical properties of high-entropy alloys through severe plastic deformation: A review DOI Creative Commons
Majid Naseri,

Ahmad Ostovari Moghadam,

Mariappan Anandkumar

и другие.

Journal of Alloys and Metallurgical Systems, Год журнала: 2024, Номер 5, С. 100054 - 100054

Опубликована: Янв. 15, 2024

High-entropy alloys (HEAs) are one of the breakthroughs in past decade alloy development that have potential to exhibit outstanding physical, mechanical, and chemical properties. This allows HEAs be highly versatile materials for use a variety applications. Through reasonable composition design post-manufacturing processes, can show superior properties compared traditional alloys, which demanded novel emerging technologies. Severe plastic deformation (SPD) has been known as most popular processes enhancing mechanical HEAs. However, there is still lack knowledge about microstructure, subjected SPD processes. review concerned with production nano/ultrafine-grained using techniques such severe cold rolling (SCR), high-pressure torsion (HPT), equal channel angular pressing (ECAP). Also, characteristics respect demonstrated, reduced grain growth phase decomposition. These increase possibility producing nanostructured high-entropy (NsHEAs) multiple principal elements by or post-annealing enable extremely high superplasticity at strain rates. Finally, these findings introduce not only processing tool improve physical HEAs, but also synthesis fabricate conventional engineering materials, especially high-tech

Язык: Английский

Процитировано

34

A comprehensive review: Discussed the effect of high-entropy alloys as reinforcement on metal matrix composite properties, fabrication techniques, and applications DOI
Vivek Pandey, R. Seetharam,

H. Chelladurai

и другие.

Journal of Alloys and Compounds, Год журнала: 2024, Номер 1002, С. 175095 - 175095

Опубликована: Июнь 10, 2024

Язык: Английский

Процитировано

18

Dichalcogenides as Emerging Electrocatalysts for Efficient Ammonia Synthesis: A Focus on Mechanisms and Theoretical Potentials DOI Open Access
Jinuk Choi, Hyojung Lim, Subramani Surendran

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 28, 2025

Abstract Developing sustainable technologies for ammonia production through electrochemical reactions offers a promising alternative by leveraging renewable energy sources to produce under ambient conditions. These methods include nitrogen reduction reaction (NRR), nitric oxide (NORR), nitrite (NO 2 RR), and nitrate 3 RR). Optimizing efficiency (EE) in synthesis has become increasingly crucial as commercialization approaches. Herein, this work comprehensive study of system EE improvements the theoretical voltage calculations based on pH expansion bifunctional catalysts like transition metal dichalcogenides (TMDs), which can efficiently catalyze oxygen evolution (OER) synthesis. The review summarizes pH‐dependent redox potential Pourbaix diagrams NRR, NO RR, offering insights into potential‐pH regions where oxides are reduced NH . Incorporating design enables researchers minimize losses better improve overall performance. Finally, wraps up exploring roles TMD different mechanisms identifying areas improvement. broader impact lies its transform alignment with global efforts reduce greenhouse gas emissions.

Язык: Английский

Процитировано

1

CNTs-supported noble metal-free high-entropy alloys heterostructure NiMoCoMnLa/CNTs@Ni for electrochemical hydrogen evolution reaction DOI
Sixuan Zhang, Jinzhao Huang, Jun Tang

и другие.

Applied Surface Science, Год журнала: 2024, Номер 667, С. 160417 - 160417

Опубликована: Май 29, 2024

Язык: Английский

Процитировано

8

High Entropy Alloys: Emerging Materials for Advanced Hydrogen Storage DOI Open Access
Yi Jiang,

Wei Jiang

Energy Technology, Год журнала: 2024, Номер unknown

Опубликована: Авг. 30, 2024

High entropy alloys (HEAs) have attracted substantial attention in diverse fields, including hydrogen storage, owing to their unique structural and functional properties. The components of HEAs made them a focal point research, aiming develop new storage materials with exceptional comprehensive present study provides review the research progress technology HEAs. It covers microstructure analysis, theoretical calculations, performance evaluation, other pertinent applications. Furthermore, this paper introduces hydrogen‐related applications while also addressing current challenges issues faced by researchers field for technology.

Язык: Английский

Процитировано

8

Achieving highly active A-site cation-deficient perovskite electrocatalysts operated at large current density toward hydrogen evolution reaction DOI
Xiaoxu Yang, Tian Xia, Qiang Li

и другие.

Separation and Purification Technology, Год журнала: 2024, Номер 339, С. 126715 - 126715

Опубликована: Фев. 8, 2024

Язык: Английский

Процитировано

7

Carbothermal shock synthesis of FeCoNiPtRu high-entropy alloy for dual-function water splitting in alkaline media DOI

Miaomiao Geng,

Yingjing Zhu,

Jibiao Guan

и другие.

Journal of Alloys and Compounds, Год журнала: 2024, Номер 1005, С. 176180 - 176180

Опубликована: Авг. 27, 2024

Язык: Английский

Процитировано

7

Multi-site synergistic hydrogen evolution reactions on porous homogeneous FeCoNiCu high-entropy alloys fabricated by solution combustion synthesis and hydrogen reduction DOI

Fei Guo,

Yilin Zhang,

Botao Shen

и другие.

Journal of Alloys and Compounds, Год журнала: 2024, Номер 1002, С. 175356 - 175356

Опубликована: Июнь 26, 2024

Язык: Английский

Процитировано

5

Unconventional Hexagonal Close‐Packed High‐Entropy Alloy Surfaces Synergistically Accelerate Alkaline Hydrogen Evolution DOI Creative Commons
Tao Hu, Cheng‐Yu Wu, Zuoli He

и другие.

Advanced Science, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 8, 2024

Accelerating the alkaline hydrogen evolution reaction (HER), which involves slow cleavage of HO-H bonds and adsorption/desorption (H*) hydroxyl (OH*) intermediates, requires developing catalysts with optimal binding strengths for these intermediates. Here, unconventional hexagonal close-packed (HCP) high-entropy alloy (HEA) atomic layers are prepared composed five platinum-group metals to enhance HER synergistically. The breakthrough is made by layer-by-layer heteroepitaxial deposition subnanometer RuRhPdPtIr HEA on HCP Ru seeds, despite thermodynamic stability Rh, Pd, Pt, Ir in a face-centered cubic (FCC) structure except Ru. synchrotron X-ray absorption spectroscopy (XAS) confirms mixing coordination environment HEA. Most importantly, they exhibit notable improvements both electrocatalytic activity durability an environment, as compared their FCC counterparts. Electrochemical measurements, operando XAS analysis, density functional theory unveil that H* OH* intermediates active Pt sites can be weakened strengthened moderate level, respectively, non-active Ru, Pd atoms within strong synergistic electronic effects.

Язык: Английский

Процитировано

3

High-Entropy Alloy Nanocatalysts for Efficient Water Splitting DOI Creative Commons

Hui-Huan Qin

Highlights in Science Engineering and Technology, Год журнала: 2025, Номер 125, С. 380 - 386

Опубликована: Фев. 18, 2025

High-entropy alloy (HEA) nanocatalysts have garnered increasing attention as a cutting-edge solution to the challenges of sustainable hydrogen production via water splitting, offering significant improvements over traditional catalysts. These advanced nanocatalysts, composed five or more principal elements, exhibit exceptional catalytic activity, superior thermal and electrochemical stability, notably reduced overpotential for both evolution reaction (HER) oxygen (OER). This review delves into synthesis methodologies HEA including their structural characterization, while highlighting performance in electrolysis green production. We also evaluate scalability, cost-effectiveness, environmental impact these comparing them conventional systems. Furthermore, discusses key emerging research directions, such optimizing elemental composition surface properties enhance efficiency address commercialization barriers. Through this comprehensive analysis, we aim provide insights future potential promoting energy solutions.

Язык: Английский

Процитировано

0