scholarly journals High Entropy Materials: Challenges and Prospects

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1643
Author(s):  
Peter K. Liaw ◽  
Weidong Li
Keyword(s):  
High Entropy ◽  
Important Concept

Entropy is an important concept in thermodynamics, measuring the disorder in a system or, more precisely, the number of possible microscopic configurations of individual atoms or molecules of a system, i.e., microstates [...]

ANALISIS WACANA KRITIS DALAM PERSPEKTIF NORMAN FAIRCLOUGH

1970 ◽  
Vol 8 (1) ◽  
pp. 1-19
Author(s):  
Elya Munfarida
Keyword(s):  
Discourse Analysis ◽  
Social Practice ◽  
Discourse Theory ◽  
Three Dimensions ◽  
Analysis Model ◽  
Important Concept ◽  
Multidisciplinary Study ◽  
Discourse Model ◽  
Discourse Practice ◽  
Domination Relation

Discourse analysis has been a study that attracts many intelectuals of various disciplines to discuss about, generating the emergence of theories of their own perspectives. Many criticisms for the theories also show that intelectuals are more interested in this field leading to make discourse analysis as a multidisciplinary study. Based on this ground, Norman Fairclough seeks to reconstruct discourse theory as a criticism to the existing theories, which tends to be side-emphasis and partial on the basis of their own discipline. Combining three traditions, i.e. linguistic, interpretative, and sociological traditions, he offers a discourse model integrating three dimensions: text, discourse practice, and social practice. Each dimension has its area, process, and analysis model, in which all of them dialectically connect to one another. In addition, Fairclough also formulates another important concept, namely intertextuality, which affirms the interrelation of various texts and discourses to a text. This concept will also create ideological effect of structuration and restructuration of the prevalent discourse order. When power and ideology embed in a discourse, intertextuality will function as a mechanism for maintaining and changing the domination relation.

Layered High-Entropy Oxide Structures for Reversible Energy Storage

2020 ◽  
Author(s):  
Junbo Wang ◽  
Yanyan Cui ◽  
Qingsong Wang ◽  
Kai Wang ◽  
Xiaohui Wang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Cathode Material ◽  
Spray Pyrolysis ◽  
Lattice Structure ◽  
Oxide Materials ◽  
High Entropy ◽  
New Class ◽  
Nebulized Spray Pyrolysis

<p>Layered Li<i><sub>x</sub></i>MO<sub>2</sub> materials, a new class of high-entropy oxides, have been synthesized by nebulized spray pyrolysis. Specifically, the lattice structure of Li(Ni<sub>1/3</sub>Mn<sub>1/3</sub>Co<sub>1/3</sub>)O<sub>2</sub> (NCM111) cathode material has been replicated successfully while increasing the number of cations in equimolar proportions, thereby allowing transition to high-entropy oxide materials.</p>

High-Entropy Alloys as Catalysts for the CO2 and CO Reduction Reactions

2019 ◽  
Author(s):  
Jack Pedersen ◽  
Thomas Batchelor ◽  
Alexander Bagger ◽  
Jan Rossmeisl
Keyword(s):  
Density Functional ◽  
Rational Design ◽  
Hydrogen Adsorption ◽  
Co Adsorption ◽  
Reduction Reaction ◽  
Supervised Machine Learning ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Co Reduction ◽  
Disordered Alloy

Using the high-entropy alloys (HEAs) CoCuGaNiZn and AgAuCuPdPt as starting points we provide a framework for tuning the composition of disordered multi-metallic alloys to control the selectivity and activity of the reduction of carbon dioxide (CO2) to highly reduced compounds. By combining density functional theory (DFT) with supervised machine learning we predicted the CO and hydrogen (H) adsorption energies of all surface sites on the (111) surface of the two HEAs. This allowed an optimization for the HEA compositions with increased likelihood for sites with weak hydrogen adsorption{to suppress the formation of molecular hydrogen (H2) and with strong CO adsorption to favor the reduction of CO. This led to the discovery of several disordered alloy catalyst candidates for which selectivity towards highly reduced carbon compounds is expected, as well as insights into the rational design of disordered alloy catalysts for the CO2 and CO reduction reaction.

Instant and Persistent Hydrogen Production Using Nano High Entropy Catalyst

2019 ◽  
Author(s):  
Nirmal Kumar ◽  
Subramanian Nellaiappan ◽  
Ritesh Kumar ◽  
Kirtiman Deo Malviya ◽  
K. G. Pradeep ◽  
...  
Keyword(s):  
Formic Acid ◽  
Minimum Energy ◽  
High Entropy Alloy ◽  
Hydrogen Energy ◽  
High Entropy ◽  
Electro Oxidation ◽  
The Individual ◽  
Novel Catalyst ◽  
Cell Anode ◽  
Fuel Cell Anode

<div>Renewable harvesting clean and hydrogen energy using the benefits of novel multicatalytic materials of high entropy alloy (HEA equimolar Cu-Ag-Au-Pt-Pd) from formic acid with minimum energy input has been achieved in the present investigation. The synthesis effect of pristine elements in the HEA drives the electro-oxidation reaction towards non-carbonaceous pathway . The atomistic simulation based on DFT rationalize the distinct lowering of the d-band center for the individual atoms in the HEA as compared to the pristine counterparts. This catalytic activity of the HEA has also been extended to methanol electro-oxidation to show the unique capability of the novel catalyst. The nanostructured HEA, properties using a combination of casting and cry omilling techniques can further be utilized as fuel cell anode in direct formic acid/methanol fuel cells (DFFE).<br></div>

Complex magnetism and magnetoresistance of Gd-Tb-Dy-Ho-Lu hexagonal high-entropy alloy

2018 ◽  
Author(s):  
Janez Dolinšek ◽  
Stanislav Vrtnik ◽  
J. Lužnik ◽  
P. Koželj ◽  
M. Feuerbacher
Keyword(s):  
High Entropy Alloy ◽  
High Entropy

Recent progress in multi-element alloy and nitride coatings sputtered from high-entropy alloy targets

2006 ◽  
Vol 31 (6) ◽  
pp. 723-736 ◽  
Author(s):  
Keng-Hao Cheng ◽  
Chia-Han Lai ◽  
Su-Jien Lin ◽  
Jien-Wei Yeh
Keyword(s):  
Recent Progress ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Nitride Coatings
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