Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
High-entropy alloys (HEAs) have attracted considerable attention as promising catalysts. Despite a rapidly growing number of publications in this area, characterization of HEA electrocatalytic activity and stability remains challenging. In this paper, we report rapid and scalable microwave-shock assisted synthesis of FeCoNiCuMnCr HEA and its characterization at a single particle level. HEA particles synthesized on HOPG without additional reagents or pre-/post-treatments exhibited a significant activity toward water oxidation in 0.1 M NaOH. Individual micrometer-sized FeCoNiCuMnCr HEA particles were imaged by scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS) to show the uniform distribution of all six metals, and the potential dependence of the oxygen evolution reaction (OER) at its surface was probed by scanning electrochemical microscopy (SECM). Significant variations in onset potential of OER on different HEA particles were observed; however, no obvious correlation with the particle size was found. The HEA stability was confirmed by SEM/EDS imaging of the same FeCoNiCuMnCr particle after several hours of OER experiments and also by voltammetry and XRD analysis.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/d4nh00659c | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
In-situ study on grain refinement mechanism of Al-13Cu alloys modified by high entropy alloy particles and ultrasonic treatment.
Ultrason Sonochem
August 2025
Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
This study explores the grain refinement mechanisms of primary α-Al during solidification of Al-13 wt% Cu alloy modified by FeCoCrNiAl high-entropy alloy (HEA) particles via ultrasonic treatment. In situ X-ray radiography combined with machine learning-based computer vision techniques was employed to systematically analyze the nucleation and growth behaviors of α-Al grains. Results indicate a significant grain refinement effect associated with increased HEA particle content and higher cooling rates.
View Article and Find Full Text PDFBreaking scaling relations in AgAuCuPdPt high-entropy alloy nanoparticles for CO electroreduction machine learning.
Mater Horiz
September 2025
Institute of High Performance Computing (IHPC), Agency for Science, Technology and Research (A*STAR), 1 Fusionopolis Way, #16-16 Connexis, Singapore 138632, Republic of Singapore.
CO electroreduction is limited by linear scaling relationships that couple the stabilities of key intermediates (*COOH, *CHO) to CO adsorption, placing pure Cu catalysts at a volcano-plot ceiling of activity and selectivity. Here, we harness the compositional variety of nanosized AgAuCuPdPt high-entropy-alloy (HEA) particles to break these constraints. We trained an ultralight linear-regression surrogate (MAE ≈ 0.
View Article and Find Full Text PDFSynthesis of calcium oxide and antimicrobial activity enhancement of chitosan bio-composite films: An active packaging material.
Int J Biol Macromol
September 2025
Division of Packaging Technology, Faculty of Agro-Industry, Chiang Mai University, Mae-Hea, Mueang, Chiang Mai 50100, Thailand; Center of Excellence in Agro Bio-Circular-Green Industry, Faculty of Agro-Industry, Chiang Mai University, Chiang Mai 50100, Thailand; Center of Excellence in Materials Sci
The incorporation of antimicrobial agents into renewable polymers has significant potential to develop sustainable materials for active packaging, addressing perishable food waste and environmental issues. Calcium oxide (CaO) particles were synthesized as an alternative antimicrobial agent using a co-precipitation technique and calcination at 650 °C for 1 h. The effect of synthesis stirring times (60, 90, and 120 min) on antimicrobial activity was analyzed.
View Article and Find Full Text PDFEffect of Ti Doping of AlCoCrFeNi-Based High Entropy Alloys on Their Erosion Resistance by Solid Particles.
Materials (Basel)
July 2025
Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36D, 20-618 Lublin, Poland.
The erosion resistance of materials against solid particles is a very important property, especially in the transportation of powders or in aeronautics (dust inside jet engines). There is a strong need to introduce new materials that have higher solid particle erosion resistance than state-of-the-art materials. Thus, in the present work, the solid erosion particles of high entropy alloys (HEAs) based on the Al0.
View Article and Find Full Text PDFCrystalline and amorphous structure selectivity of ignoble high-entropy alloy nanoparticles during laser ablation in organic liquids is set by pulse duration.
Beilstein J Nanotechnol
July 2025
Technical Chemistry I and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 7, 45141 Essen, Germany.
High-entropy alloy nanoparticles (HEA NPs) represent a promising material class with significant potential in various applications, such as heterogeneous catalysis or magnetic devices. This is due to their exceptional compositional tunability arising from the synergistic interplay of multiple elements within a single particle. While laser-synthesized, surfactant-free colloidal HEA NPs have already been reported, the underlying formation mechanism remains unknown, particularly the underexplored preference of amorphous over crystalline structures warrants further investigation.
View Article and Find Full Text PDF