Enhancing Urea Electrosynthesis From CO₂ and Nitrate Through High‐Entropy Alloying

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

Published: March 22, 2025

Abstract Ordered intermetallic compounds, one of the most effective alloying ways enhancing electrocatalytic activity may provide more active sites for intermediates adsorption in single catalytic reactions. However, catalysis involving several starting materials (such as co‐catalytic synthesis urea from CO 2 and NO 3 ⁻), it typically cannot favor multiple adsorption, leading to preferred individual preventing C─N coupling. As a proof concept, AuCuIrCo medium‐entropy (MEI) compounds are synthesized use Pd disrupt ordered arrangement, achieving PdAuCuIrCo high‐entropy alloy (HEA) counterpart synthesis. In situ spectroscopic analyses indicate that MEI produces greater NH₃–resultant sole ⁻ reduction, while HEA yields coupling products. Theoretical calculations shows reduced * energy compared lowers barriers both hydrogenation processes, allowing co‐adsorption with , whereas excessively stabilizes favoring single‐pathway reduction NH . Consequently, achieves high yield rate 52.43 mmol h⁻¹ g⁻¹ Faradaic efficiency 22.57% at −0.9 V, greatly surpassing MEI. This study provides framework development multi‐pathway

Language: Английский

Fabrication of Superhydrophobic Ultra-Fine Brass Wire by Laser Processing

Materials, Journal Year: 2025, Volume and Issue: 18(7), P. 1420 - 1420

Published: March 23, 2025

Superhydrophobic metal wires have shown great application prospects in oil–water separation, anti-corrosion, anti-icing, and other fields due to their excellent water repellency. However, how fabricate a superhydrophobic surface on ultra-fine wire remains challenge. Here, we proposed method using laser processing efficiently brass wire. Firstly, analyzed the mechanism of curved surfaces designed controllable angle rotation fixture avoid machining error caused by secondary positioning process. Then, investigated influences power, scanning speed, times morphology wettability The optimal parameters were obtained: power 6 W, speed 500 mm/s, time 1. After low energy modification, contact roughness Sa 156° 1.107 μm, respectively. This work is expected enrich theory technology for fabricating

Language: Английский