Experimental Validation of Hydrogen Affinity as a Design Criterion for Alloys

Materials, Journal Year: 2024, Volume and Issue: 17(24), P. 6106 - 6106

Published: Dec. 13, 2024

This study introduces an innovative approach to alloy design by experimentally validating the semi-empirical concept of Griessen and Driessen, which predicts hydrogen affinity solid solutions. The work focuses on designing synthesizing four equiatomic high-entropy alloys (HEAs) with compositions tailored exhibit highly endothermic enthalpies solution formation, resulting in resistance absorption. Unlike conventional studies that prioritize storage capacity, this research uniquely targets optimized for minimal interaction, addressing critical needs transportation technologies prone embrittlement. Experimental results confirm negligible absorption these alloys, a maximum 0.23 wt.% (H/M = 0.13) at 2 MPa 175 °C. not only demonstrates applicability theoretical model guide but also highlights potential materials low-pressure systems, where mechanical integrity degradation are paramount. findings bridge gap between predictions practical applications, offering novel perspective development hydrogen-related technologies.

Language: Английский

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Rapid Chemical Synthesis of High-Entropy Oxide Colloids under Ambient Conditions

ACS Materials Letters, Journal Year: 2024, Volume and Issue: unknown, P. 5325 - 5332

Published: Nov. 5, 2024

High-entropy oxides (HEOs) exhibit high catalytic activities in the O2 evolution reaction (OER). Nevertheless, methods used for fabrication of these necessitate application heat and/or pressure. Accordingly, herein, HEO colloids are produced by a facile procedure under ambient temperature and pressure conditions using strong base, an oxidant, metal salt(s). Using proposed method, containing up to 12 elements prepared specifically tailored as electrocatalysts OER. This chemical approach enables cost-effective production with diverse compositions, opening door wide range applications HEOs.

Language: Английский

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Nanosecond pulsed laser coloring of the CrMnFeCoNi high entropy alloy

Vacuum, Journal Year: 2024, Volume and Issue: unknown, P. 113763 - 113763

Published: Oct. 1, 2024

Language: Английский

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Machine Learning Boosted Entropy-Engineered Synthesis of CuCo Nanometric Solid Solution Alloys for Near-100% Nitrate-to-Ammonia Selectivity

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 28, 2024

Nanometric solid solution alloys are utilized in a broad range of fields, including catalysis, energy storage, medical application, and sensor technology. Unfortunately, the synthesis these becomes increasingly challenging as disparity between metal elements grows, due to differences atomic sizes, melting points, chemical affinities. This study data-driven approach incorporating sample balancing enhancement techniques multilayer perceptron (MLP) algorithms improve model's ability handle imbalanced data, significantly boosting efficiency experimental parameter optimization. Building on this enhanced data processing framework, we developed an entropy-engineered specifically designed produce stable, nanometric copper cobalt (CuCo) alloys. Under conditions −0.425 V (vs RHE), CuCo alloy exhibited nearly 100% Faraday (FE) high ammonia production rate 232.17 mg h–1 mg–1. Stability tests simulated industrial environment showed that catalyst maintained over 80% FE exceeding 170 mg–1 testing period 120 h, outperforming most reported catalysts. To delve deeper into synergistic interaction mechanisms Cu Co, situ Raman spectroscopy was for real-time monitoring, density functional theory (DFT) calculations further substantiated our findings. These results not only highlight exceptional catalytic performance but also reflect effective electronic interactions two metals.

Language: Английский

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Understanding the evolution of high-entropy oxide OER electrocatalyst with anion regulation

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 92, P. 639 - 647

Published: Oct. 29, 2024

Language: Английский

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Inverse analysis-guided development of acid-tolerant nanoporous high-entropy alloy catalysts for enhanced water-splitting performance

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Through material-driven inverse analysis, the acid-tolerant high-entropy catalyst, composed of Al, Au, Ir, Nb, Pt, Rh, Ru, and Ta, exhibited superior catalytic activity stability in acidic environments, outperforming Pt IrO 2 catalysts.

Language: Английский

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