Ultrasound-Assisted Synthesis of High-Entropy Materials for Enhanced Oxygen Evolution Electrocatalysis DOI Creative Commons
Zhiyuan Wang, Chengxu Zhang, Yue Zhang

et al.

Metals, Journal Year: 2024, Volume and Issue: 14(4), P. 384 - 384

Published: March 25, 2024

High-entropy materials (HEMs) play a significant role in the electrocatalytic oxygen evolution reaction (OER) due to their unique properties. However, there are still challenges preparation of HEMs for OER catalysts. In this study, FeCoNiMnCr catalyst is synthesized first time using ultrasonic hydrothermal-sintering technique and exhibits excellent performance electrocatalysis. There an optimal hydrothermal power achieving best performance. The results demonstrate that catalysts prepared through sintering (US-FeCoNiMnCr) significantly improved compared with traditional method. US-FeCoNiMnCr overpotential 228 mV at current density 10 mA cm−2 Tafel slope as low 45.39 dec−1 alkaline medium. Moreover, demonstrates remarkable stability minimal potential increase observed even after 48 h. This work not only provides valuable insights into high-entropy material synthesis, but also presents powerful electrocatalyst water electrolysis.

Language: Английский

Coupling Ir single atom with NiFe LDH/NiMo heterointerface toward efficient and durable water splitting at large current density DOI

Yuewen Wu,

Mingpeng Chen,

Huachuan Sun

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 360, P. 124548 - 124548

Published: Aug. 28, 2024

Language: Английский

Citations

11
Self‐Encapsulated Ni Nanoparticles on Delignified Wood Carbon for Efficient Urea‐Assisted Hydrogen Production DOI
Zhikai Shi, Yao Zhang,

Wei Guo

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 8, 2024

Abstract Developing efficient, low‐cost electrocatalysts for industrial‐level hydrogen production remains a significant challenge. Here lattice‐distorted Ni nanoparticles (NPs) encapsulated within nitrogen‐doped carbon shell on delignified wood (Ni‐NC@DWC) are constructed through chitosan‐induced assembly and the pyrolysis process. Experimental theoretical results indicate that lattice distortion due to strong metal‐support interactions, boosts electron transfer reaction intermediate adsorption/desorption, enhancing both urea oxidation (UOR) evolution (HER). Interestingly, active center 3+ ‐O is dynamically cyclically generated during UOR. When utilized as self‐standing electrode in an alkaline electrolyte, Ni‐NC@DWC exhibits low potentials of 24 mV 1.244 V at 100 mA cm −2 HER UOR, respectively. Moreover, achieves ultrasmall cell voltage 1.13 urea‐assisted water splitting can operate stably over 1000 h. Furthermore, when it self‐assembled anion exchange membrane (AEM) electrolyzer, requires only 1.62 2000 industrial operates 150 h without degradation, confirming highly attractive economical, sustainable, scalable production.

Language: Английский

Citations

11
The breakthrough of oxide pathway mechanism in stability and scaling relationship for water oxidation DOI Creative Commons
Zhaohua Yin,

Hong Liu,

Jin‐Song Hu

et al.

National Science Review, Journal Year: 2024, Volume and Issue: 11(11)

Published: Oct. 15, 2024

ABSTRACT An in-depth understanding of electrocatalytic mechanisms is essential for advancing electrocatalysts the oxygen evolution reaction (OER). The emerging oxide pathway mechanism (OPM) streamlines direct O–O radical coupling, circumventing formation vacancy defects featured in lattice (LOM) and bypassing additional intermediates (*OOH) inherent to adsorbate (AEM). With only *O *OH as intermediates, OPM-driven stand out their ability disrupt traditional scaling relationships while ensuring stability. This review compiles latest significant advances OPM-based electrocatalysis, detailing design principles, synthetic methods, sophisticated techniques identify active sites pathways. We conclude with prospective challenges opportunities electrocatalysts, aiming advance field into a new era by overcoming constraints.

Language: Английский

Citations

11
High-Entropy Oxides as Energy Materials: From Complexity to Rational Design DOI Creative Commons

Zhong Yang,

Xianglin Xiang,

Jian Yang

et al.

Materials Futures, Journal Year: 2024, Volume and Issue: 3(4), P. 042103 - 042103

Published: Oct. 8, 2024

Abstract High-entropy oxides (HEOs), with their multi-principal-element compositional diversity, have emerged as promising candidates in the realm of energy materials. This review encapsulates progress harnessing HEOs for conversion and storage applications, encompassing solar cells, electrocatalysis, photocatalysis, lithium-ion batteries, solid oxide fuel cells. The critical role theoretical calculations simulations is underscored, highlighting contribution to elucidating material stability, deciphering structure-activity relationships, enabling performance optimization. These computational tools been instrumental multi-scale modeling, high-throughput screening, integrating artificial intelligence design. Despite promise, challenges such fabrication complexity, cost, hurdles impede broad application HEOs. To address these, this delineates future research perspectives. include innovation cost-effective synthesis strategies, employment situ characterization micro-chemical insights, exploration unique physical phenomena refine performance, enhancement models precise structure-performance predictions. calls interdisciplinary synergy, fostering a collaborative approach between materials science, chemistry, physics, related disciplines. Collectively, these efforts are poised propel towards commercial viability new technologies, heralding innovative solutions pressing environmental challenges.

Language: Английский

Citations

10
High-Entropy Heterostructures Modulated by Oxyphilic Transition Metals for Efficient Oxygen Evolution Reaction DOI

Wenqing Guan,

Chengxu Zhang, Yue Zhang

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: unknown, P. 110528 - 110528

Published: Nov. 1, 2024

Language: Английский

Citations

10
Manipulating heterointerface to boost formation and desorption of intermediates for highly efficient alkaline hydrogen evolution DOI
Ruchun Li, Fengyi Liu,

Quan‐Qing Xu

et al.

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 671, P. 469 - 476

Published: May 24, 2024

Language: Английский

Citations

9
Interstitial Oxygen Acts as Electronic Buffer Stabilizing High‐Entropy Alloys for Trifunctional Electrocatalysis DOI

Xiaoxiao Zou,

Xinyu Zhao, Bingjie Pang

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 22, 2024

Understanding the effect of elements' oxygen affinity is essential for comprehending high-entropy alloys' (HEAs) complete properties. However, origin HEAs' oxygen-containing structure and stability remains poorly understood, primarily due to their diverse components, hindering synthesis analysis. Herein, O-doping HEAs (HEA-O) have demonstrated outstanding performance in electrolyzed water Zinc-air batteries which can be reassembled after being stable more than 1600 h when zinc consumption over. The experiment DFT simulation demonstrate that Cr with strong introduce into system HEAs. Consequently, interstitial oxygens act as electronic buffers making binding energy other metal elements move a higher level. Additionally, lowers d-band center promoting electrochemical activity increasing vacancy formation energies active sites leading super stability. study provides significant insights design comprehension oxygen-doped

Language: Английский

Citations

9
Deciphering the Role of Second Metal in M‐Ni (M = Fe, Ni, and Mn) Heterobimetallic Electrocatalysts in Controlling the HAT versus Hydride Transfer Mechanism for the Dehydrogenation of Alcohols DOI Open Access

Chetansinh Chauhan,

Tarisha Gupta,

Biswajit Mondal

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Abstract The second 3d‐transition metal incorporation in Ni‐(oxy)hydroxide has a drastic effect on alkaline OER and alcohol dehydrogenation reactivity. While Mn suppresses the OER, it greatly improves A complete reversal of reactivity is obtained when Fe incorporated, which shows better performance for with poor role 3d‐metal elusive due to lack systematic mechanistic studies. In this report, we thoroughly analyzed series M─Ni (M = Fe, Ni, Mn) (oxy)hydroxides derived from electrochemical activation M‐MOF grown nickel foam its activity aliphatic, benzyl dehydrogenation. With help pH‐dependence kinetic isotope studies, potential‐determining step (PDS) rate‐determining (RDS) have been elucidated. Hammett analysis revealed critical information about transition state offered insight into hydrogen atom transfer (HAT) versus hydride (HT) operative various heterobimetallic electrocatalysts. Further, superior NiMn catalyst PET hydrolysate electro‐oxidation extended afford valuable chemicals concomitant production hydrogen.

Language: Английский

Citations

1
“One Stone, Two Birds”: Multi‐Element Doping Induced Crystallinity Modulation for Large Current Density Oxygen Evolution Reaction DOI Open Access
Yuhang Yuan, Yifan Yang, Guanglei Liu

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 23, 2025

Abstract Oxygen evolution reaction (OER) plays a critical role in water splitting, which can directly determine the energy consumption of hydrogen production. However, poor stability catalysts at large current density inhibits their industrial application. Therefore, development efficient with industry‐relevant activities still faces great challenges. Herein, one‐step corrosion strategy is reported for preparation multi‐element low‐crystal transition metal hydroxide (denoted as NiFeCrMnCo‐c). Density functional theory calculation indicates that doping improves conductivity catalyst and reduces barrier catalytic process. Only 259 303 mV overpotentials are required to achieve anodic densities 100 1000 mA cm −2 respectively, it work 50 300 h without apparent attenuation. Furthermore, when self‐assembled an anion exchange membrane electrolyzer, requires only 1.72 V splitting operates stably 60 °C, meet requirements The design OER simple preparation, high activity, provides new perspective practical splitting.

Language: Английский

Citations

1
Ultrafast Photoflash Synthesis of High-Entropy Oxide Nanoparticles DOI Creative Commons
Jihyun Baek, Yue Jiang, Dongwon Ka

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 30, 2025

High-entropy metal oxides (HEOs) have recently received growing attention for broad energy conversion and storage applications due to their tunable properties. HEOs typically involve the combination of multiple cations in a single oxide lattice, thus bringing distinctive structures, controllable elemental composition, functional Many synthesis methods been reported, such as solid-state reactions carbon thermal shock methods. These frequently are energy-intensive or require relatively expensive heating equipment. In this work, we report an ultrafast photoflash method HEO nanoparticles on diverse substrates. The input is provided by commercial Xe unit, which triggers exothermic convert salt precursors within tens milliseconds. formation attributed (∼106 K/s) cooling (∼105 rates overall high temperature (>1000 K) during process. When synthesized CoNiFeCrMn (HEO) tested oxygen evolution reaction electrocatalyst, it shows similar activity materials prepared other We believe provides simple many others synthesize explore properties potential applications.

Language: Английский

Citations

1