scholarly journals Nanoporous ultra-high-entropy alloys containing fourteen elements for water splitting electrocatalysis

2021 ◽  
Author(s):  
Ze-Xing Cai ◽  
Hiromi Goou ◽  
Yoshikazu Ito ◽  
Tomoharu Tokunaga ◽  
Masahiro Miyauchi ◽  
...  
Keyword(s):  
Water Splitting ◽  
High Entropy Alloys ◽  
Acidic Media ◽  
High Entropy ◽  
Electrocatalytic Performance

Nanoporous ultra-high-entropy alloys containing 14 elements (Al, Ag, Au, Co, Cu, Fe, Ir, Mo, Ni, Pd, Pt, Rh, Ru, and Ti) were obtained by dealloying. The products showed excellent electrocatalytic performance for water splitting in acidic media.

Exploring the impact of atomic lattice deformation on oxygen evolution reactions based on a sub-5 nm pure face-centred cubic high-entropy alloy electrocatalyst

2020 ◽  
Vol 8 (24) ◽  
pp. 11938-11947 ◽  
Author(s):  
Kang Huang ◽  
Bowei Zhang ◽  
Junsheng Wu ◽  
Tianyuan Zhang ◽  
Dongdong Peng ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Noble Metals ◽  
High Entropy Alloy ◽  
Lattice Deformation ◽  
High Entropy Alloys ◽  
Atomic Lattice ◽  
High Entropy ◽  
The Impact

Multimetal high-entropy alloys (HEAs) have been recognized as potential catalysts that can possibly replace the conventional metal oxides and noble metals for use in energy conversion and water splitting such as oxygen evolution reactions (OERs).

Preparation, Electrical and Electrochemical Characterizations of CuCoNiFeMn High-Entropy-Alloy for Overall Water Splitting at Neutral-pH

2021 ◽  
Author(s):  
Sivanantham Arumugam ◽  
Hansung Lee ◽  
Sung Won Hwang ◽  
Byungmin Ahn ◽  
In Sun Cho
Keyword(s):  
Water Splitting ◽  
Active Sites ◽  
Surface Composition ◽  
Electrochemical Characterizations ◽  
High Entropy Alloy ◽  
High Entropy Alloys ◽  
Equiatomic Composition ◽  
High Entropy ◽  
Neutral Ph ◽  
Overall Water Splitting

High entropy alloys (HEA), the multicomponent (5 or more) alloys with an equiatomic or a near equiatomic composition, provide a unique platform to engineer surface composition and active sites for...

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.

Effect of the structure of vacuum condensates of high entropy alloys of Cr–Fe–Co–Ni–Cu system on their mechanical properties

2020 ◽  
Vol 2020 (4) ◽  
pp. 16-22
Author(s):  
A.I. Ustinov ◽  
◽  
V.S. Skorodzievskii ◽  
S.A. Demchenkov ◽  
S.S. Polishchuk ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Vacuum Condensates

Local Lattice Distortion and Chemical Short Range Order in High Entropy Alloys

2020 ◽  
Author(s):  
Yuan-Yuan Tan ◽  
Ming-Yao Su ◽  
Zhou-Can Xie ◽  
Zhong-Jun Chen ◽  
Yu Gong ◽  
...  
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Lattice Distortion ◽  
Range Order ◽  
High Entropy Alloys ◽  
Local Lattice Distortion ◽  
High Entropy ◽  
Local Lattice
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