Clarifying the four core effects of high-entropy materials

Nature Reviews Chemistry, Journal Year: 2024, Volume and Issue: 8(6), P. 471 - 485

Published: May 2, 2024

Language: Английский

---

High-entropy alloys in electrocatalysis: from fundamentals to applications

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(23), P. 8319 - 8373

Published: Jan. 1, 2023

In this review, we provide a comprehensive summary of recent advances in the synthesis strategies, design principles, and characterization technologies high entropy alloys, their applications various electrocatalytic conversion reactions.

Language: Английский

---

Sabatier Relations in Electrocatalysts Based on High‐entropy Alloys with Wide‐distributed d‐band Centers for Li‐O₂ Batteries

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(44)

Published: Sept. 12, 2023

Li-O2 battery (LOB) is a promising "beyond Li-ion" technology with ultrahigh theoretical energy density (3457 Wh kg-1 ), while currently impeded by the sluggish cathodic kinetics of reversible gas-solid reaction between O2 and Li2 . Despite many catalysts are developed for accelerating conversion process, lack design guidance achieving high performance makes exploring aleatory. The Sabatier principle an acknowledged theory connecting scaling relationship heterogeneous catalytic activity, providing tradeoff strategy topmost performance. Herein, series wide-distributed d-band centers (i.e., wide range adsorption strength) elaborately constructed via high-entropy strategy, enabling in-depth study relations in electrocatalysts LOBs. A volcano-type correlation center activity emerges. Both experimental results indicate that moderate appropriate strength propels up to top. As demonstration concept, LOB using FeCoNiMnPtIr as catalyst provides exceptional efficiency over 80 %, works steadily 2000 h fixed specific capacity 4000 mAh g-1 This work certifies applicability designing advanced assembled

Language: Английский

---

Unlocking the Potential of High Entropy Alloys in Electrochemical Water Splitting: A Review

Small, Journal Year: 2024, Volume and Issue: 20(29)

Published: Feb. 23, 2024

The global pursuit of sustainable energy is focused on producing hydrogen through electrocatalysis driven by renewable energy. Recently, High entropy alloys (HEAs) have taken the spotlight in electrolysis due to their intriguing cocktail effect, broad design space, customizable electronic structure, and stabilization effect. tunability complexity HEAs allow a diverse range active sites, optimizing adsorption strength activity for electrochemical water splitting. This review comprehensively covers contemporary advancements synthesis technique, framework, physio-chemical evaluation approaches HEA-based electrocatalysts. Additionally, it explores principles strategies aimed at catalytic activity, stability, effectiveness evolution reaction (HER), oxygen (OER), overall Through an in-depth investigation these aspects, inherent constituent element interactions, processes, sites associated with unravel. Eventually, outlook regarding challenges impending difficulties outline future direction HEA provided. thorough knowledge offered this will assist formulating designing catalysts based next generation electrochemistry-related applications.

Language: Английский

---

Synthesis of Ultrathin High-Entropy Oxides with Phase Controllability

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(11), P. 7118 - 7123

Published: March 4, 2024

High-entropy oxides (HEOs) with an ultrathin geometric structure are especially expected to exhibit extraordinary performance in different fields. The phase is deemed as a key factor determining the properties of HEOs, rendering their control synthesis tempting. However, disparity intrinsic structures and physicochemical multiple components makes it challenging form single-phase HEOs target phase. Herein, we proposed self-lattice framework-guided strategy realize desired structures, including rock-salt, spinel, perovskite, fluorite phases. participation Ga assistor was conducive formation high-entropy mixing state by decreasing energy. as-prepared spinel were demonstrated be excellent catalyst high activity stability for oxygen evolution reaction water electrolysis. Our work injects new vitality into advanced applications undoubtedly expedites engineering.

Language: Английский

---

Tailoring Local Chemical Ordering via Elemental Tuning in High-Entropy Alloys

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(3), P. 2167 - 2173

Published: Jan. 12, 2024

Due to the large multi-elemental space desired for property screening and optimization, high-entropy alloys (HEAs) hold greater potential over conventional a range of applications, such as structural materials, energy conversion, catalysis. However, relationship between HEA composition its local structural/elemental configuration is not well understood, particularly in noble-metal-based nanomaterials, hindering design development nano-HEAs conversion catalysis applications. Herein, we determined precise atomic-level elemental arrangements model HEAs composed RhPtPdFeCo RuPtPdFeCo unveil their characteristics. Notably, by changing just one constituent element (Rh Ru), found dramatic changes arrangement from complete random mixing single ordering feature. Additionally, demonstrate that can be further controlled varying Ru concentration, allowing us toggle clustering distinct heterostructures multicomponent systems. Overall, our study presents practical approach manipulating atomic structures systems, which could provide in-depth knowledge mechanistically understand functionality nanomaterials

Language: Английский

---

Emerging high-entropy compounds for electrochemical energy storage and conversion

Progress in Materials Science, Journal Year: 2024, Volume and Issue: 145, P. 101300 - 101300

Published: April 18, 2024

Language: Английский

---

High‐Entropy Catalysis Accelerating Stepwise Sulfur Redox Reactions for Lithium–Sulfur Batteries

Advanced Science, Journal Year: 2024, Volume and Issue: 11(31)

Published: June 17, 2024

Abstract Catalysis is crucial to improve redox kinetics in lithium–sulfur (Li–S) batteries. However, conventional catalysts that consist of a single metal element are incapable accelerating stepwise sulfur reactions which involve 16‐electron transfer and multiple Li 2 S n (n = 2–8) intermediate species. To enable fast Li–S batteries, it proposed use high‐entropy alloy (HEA) nanocatalysts, demonstrated effective adsorb lithium polysulfides accelerate their kinetics. The incorporation elements (Co, Ni, Fe, Pd, V) within HEAs greatly enhances the catalytically active sites, not only improves rate capability, but also elevates cycling stability assembled Consequently, HEA‐catalyzed batteries achieve high capacity up 1364 mAh g −1 at 0.1 C experience slight fading 0.054% per cycle over 1000 cycles C, while pouch cell achieves specific 1192 . superior performance demonstrates effectiveness HEA with maximized synergistic effect for conversion reactions, opens way improving electrochemical reactions.

Language: Английский

---

Activation of Ga Liquid Catalyst with Continuously Exposed Active Sites for Electrocatalytic C−N Coupling

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(18)

Published: Feb. 15, 2024

Abstract Environmentally friendly electrocatalytic coupling of CO 2 and N for urea synthesis is a promising strategy. However, it still facing problems such as low yield well stability. Here, new carbon‐coated liquid alloy catalyst, Ga 79 Cu 11 Mo 10 @C designed efficient electrochemical by activating active sites. During the co‐reduction process, reaches 28.25 mmol h −1 g , which highest reported so far under same conditions, Faraday efficiency (FE) also high 60.6 % at −0.4 V vs. RHE. In addition, catalyst shows excellent stability 100 testing. Comprehensive analyses showed that sequential exposure density sites promoted adsorption activation reactions. This reaction occurs through thermodynamic spontaneous between *N=N* to form C−N bond. The deformability state facilitates recovery enhances resistance poisoning. Moreover, introduction stimulates sites, successfully synthesises *NCON* intermediate. energy barrier third proton‐coupled electron transfer process rate‐determining step (RDS) *NHCONH→*NHCONH was lowered, ensuring urea.

Language: Английский

---

Octahedral Nanocrystals of Ru‐Doped PtFeNiCuW/CNTs High‐Entropy Alloy: High Performance Toward pH‐Universal Hydrogen Evolution Reaction

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(33)

Published: June 18, 2024

Integrating high-entropy philosophy and nanocrystal-specific orientation into a single catalyst represents promising strategy in development of high-performance catalysts. Nonetheless, shape-controlled synthesis alloy (HEA) nanocrystals is challenging owing to the distinct redox potentials growth dynamics metal elements. Herein, one-pot co-reduction method developed fabricate ruthenium (Ru)-doped PtFeNiCuW octahedral HEA onto carbon nanotubes (Ru-PtFeNiCuW/CNTs). It demonstrated that Ru dopants W(CO)

Language: Английский

---