High‐Entropy Photothermal Materials

He, Cheng‐Yu; Li, Yang; Zhou, Zhuo‐Hao; Liu, Bao‐Hua; Gao, Xiang‐Hu

doi:10.1002/adma.202400920

Cited by 20 publications

(1 citation statement)

References 251 publications

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“…Hence, the samples are all simple solid solutions, and their crystalline structures are face-centered cubic. Meanwhile, with the increase of the Mn ratio, a small number of oxide peaks appeared, caused by the oxidation of the Mn element. , The corresponding impurity phases could result in potential phase instability in high-entropy alloy systems, which should be carefully controlled to reduce their influences …”

Section: Results and Discussionmentioning

confidence: 99%

Optimized Photothermal Conversion Ability through Interband Transitions in FeCoNiCrMn High-Entropy-Alloy Nanoparticles

Feng,

Yao,

Sun

et al. 2024

ACS Appl. Mater. Interfaces

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High-entropy-alloy nanoparticles (HEA-NPs) composed of 3d transition metallic elements have attracted intensive attention in photothermal conversion regions due to their d−d interband transitions (IBTs). However, the effect arising from the unbalanced elemental ratio still needs more focus. In this work, FeCoNiCrMn HEA-NPs with different elemental ratios among Cr and Mn have been employed to clarify the impact of different composed elements on the optical absorption and photothermal conversion performance. It can be recognized that the unbalanced elemental ratio of HEA-NPs can reduce the photothermal performance. Density functional theory calculation demonstrated that d−d IBTs can be changed by the different composed element ratios, resulting in a number of insufficient filling regions around the Fermi level (±4 eV). As a result, the HEA-NPs (FeCoNiCr 0.75 Mn 0.25 ) with a balanced elemental ratio exhibit the highest surface temperature of 97.6 °C under 1 sun irradiation, and the evaporation rate and energy conversion efficiency could reach 2.13 kg•m −2 • h −1 and 93%, respectively, demonstrating effective solar steam generation behavior.

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Section: Results and Discussionmentioning

confidence: 99%

Optimized Photothermal Conversion Ability through Interband Transitions in FeCoNiCrMn High-Entropy-Alloy Nanoparticles

Feng,

Yao,

Sun

et al. 2024

ACS Appl. Mater. Interfaces

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Atomic‐Level Electric Polarization in Entropy‐Driven Perovskites for Boosting Dielectric Response

Xiong,

Liu,

Zhang

et al. 2024

Advanced Materials

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Dielectric oxides with robust relaxation responses are fundamental for electronic devices utilized in energy absorption, conversion, and storage. However, the structural origins governing the dielectric response remain elusive due to the involvement of atomically complex compositional and structural environments. Herein, configurational entropy is introduced as a regulatory factor to precisely control the structural heterogeneity in representative perovskite dielectric oxides. Through advanced structural and electric field visualization studies, a novel quantitative relationship is established between atomic‐level structural disorder‐induced electric field polarization and macroscopic dielectric properties. The results indicate that the degree of atomic delocalization in perovskite oxides exhibits a near‐parabolic trend with increasing entropy, reaching a maximum in medium‐entropy perovskite. Correspondingly, the atomic electric field vectors display significant asymmetrical distribution, thus greatly enhancing angstrom‐scale electric field polarization. Then, it is experimentally proven that entropy‐driven electric polarization can improve the dielectric relaxation behavior characterized by broader frequency and stronger intensity of electromagnetic energy absorption, with improvements of approximately 160% and 413% compared to structurally homogeneous control. This study unveils the quantitative correlation between angstrom‐scale electric field polarization and dielectric response in perovskite oxides, offering a novel perspective for exploring the structure–property relationship in dielectric materials.

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PdMoPtCoNi High Entropy Nanoalloy with d Electron Self‐Complementation‐Induced Multisite Synergistic Effect for Efficient Nanozyme Catalysis

Yang,

Feng,

et al. 2024

Advanced Science

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Engineering multimetallic nanocatalysts with the entropy‐mediated strategy to reduce reaction activation energy is regarded as an innovative and effective approach to facilitate efficient heterogeneous catalysis. Accordingly, conformational entropy‐driven high‐entropy alloys (HEAs) are emerging as a promising candidate to settle the catalytic efficiency limitations of nanozymes, attributed to their versatile active site compositions and synergistic effects. As proof of the high‐entropy nanozymes (HEzymes) concept, elaborate PdMoPtCoNi HEA nanowires (NWs) with abundant active sites and tuned electronic structures, exhibiting peroxidase‐mimicking activity comparable to that of natural horseradish peroxidase are reported. Density functional theory calculations demonstrate that the enhanced electron abundance of HEA NWs near the Fermi level (EF) is facilitated via the self‐complementation effect among the diverse transition metal sites, thereby boosting the electron transfer efficiency at the catalytic interface through the cocktail effect. Subsequently, the HEzymes are integrated with a portable electronic device that utilizes Internet of Things‐driven signal conversion and wireless transmission functions for point‐of‐care diagnosis to validate their applicability in digital biosensing of urinary biomarkers. The proposed HEzymes underscore significant potential in enhancing nanozymes catalysis through tunable electronic structures and synergistic effects, paving the way for reformative advancements in nano‐bio analysis.

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High‐Entropy Photothermal Materials

Cited by 20 publications

References 251 publications

Optimized Photothermal Conversion Ability through Interband Transitions in FeCoNiCrMn High-Entropy-Alloy Nanoparticles

Optimized Photothermal Conversion Ability through Interband Transitions in FeCoNiCrMn High-Entropy-Alloy Nanoparticles

Atomic‐Level Electric Polarization in Entropy‐Driven Perovskites for Boosting Dielectric Response

PdMoPtCoNi High Entropy Nanoalloy with d Electron Self‐Complementation‐Induced Multisite Synergistic Effect for Efficient Nanozyme Catalysis

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