Optimization of Dissolution Parameters for GH4738 Scrap via Response Surface Methodology DOI Open Access
Guiqun Liu, Xinyu Fang, Xiaoli Zhang

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(4), P. 793 - 793

Published: Feb. 11, 2025

This study aimed to optimize the electrochemical dissolution process of GH4738 scrap, a Ni-based superalloy, achieve high rate with minimal energy consumption. Using Plackett–Burman design, we identified four key factors from pool eight candidates that significantly influence both and consumption: current density, NiCl2 concentration, electrolysis time, H2SO4 concentration. The steepest ascent method was then applied define region minimized consumption while maximizing rate. Response surface methodology (RSM) used determine central point for further analysis, providing valuable insights optimizing parameters. demonstrated increasing concentration reduced breakdown potential, at an 1.5 mol/L, efficiency achieved interactions among parameters affected performance. Analysis variance (ANOVA) confirmed significant these on behavior superalloys. research contributes understanding scrap provides systematic approach process, which is crucial efficient material recovery laboratory sustainability.

Language: Английский

Resolving the Nanostructure of Carbon Nitride‐Supported Single‐Atom Catalysts DOI Creative Commons
Nicolò Allasia, Shuai Xu,

Sadaf Fatima Jafri

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

Abstract Single‐atom catalysts (SACs) are gathering significant attention in chemistry due to their unique properties, offering uniform active site distribution and enhanced selectivity. However, precise structure often remains unclear, with multiple models proposed the literature. Understanding coordination environment of at atomic level is crucial for explaining catalytic activity. Here, a comprehensive study SACs made carbon nitride (CN x ) containing isolated nickel atoms presented. Using combination synthesis techniques characterization methods including Fourier‐transform infrared spectroscopy, X‐ray absorption spectroscopy (XAS), density functional theory (DFT) calculations, local centers CN ‐supported investigated. These results challenge conventional structural propose new architecture that better aligns current experimental evidence. This serves as foundational step toward rational approach catalyst development can facilitate more design application these innovative catalysts.

Language: Английский

Citations

7

Modification engineering over single-atom catalysts for efficient heterogeneous photocatalysis DOI

Hongda Liu,

Weiping Xiong, Chengyun Zhou

et al.

Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 529, P. 216468 - 216468

Published: Jan. 21, 2025

Language: Английский

Citations

2

Enhanced Three-Component Chloro-/Azido-Fluoroalkylation of Unactivated Alkenes via the Proximity Effect in a Heterogenous Metallaphotocatalyst DOI
Xiaolin Shi, Maolin Li,

Yuanjun Zhao

et al.

ACS Catalysis, Journal Year: 2025, Volume and Issue: 15(3), P. 2180 - 2191

Published: Jan. 22, 2025

Heterogeneous metallaphotocatalytic chemical transformations employing a recyclable catalyst are highly desirable for organic synthesis. However, the rational design and controlled preparation of well-defined, site-isolated metal/photo bifunctional heterogeneous catalysts to achieve this goal remain significant challenge. In study, we demonstrate covalent attachment homogeneous molecular MnSalen complex (where Salen = N,N′-bis(salicylidene)ethylenediamine) onto surface graphitic carbon nitride (CN) via an amide bond visible-light-driven chloro- azido-fluoroalkylation unactivated alkenes. The linkage between CN not only facilitates electron delocalization enhances light-harvesting capabilities photosensitizer but also exerts proximity effect that markedly ability Mn sites capture alkyl radical intermediates during reaction process. A diverse set alkenes could be efficiently azido-fluoroalkylated their corresponding difunctionalized products in moderate high yields with good functional group compatibility. Furthermore, practicability protocol is illustrated through late-stage diversification various bioactive compounds pharmaceuticals. Notably, integrated photocatalyst demonstrates stability can recycled at least 10 times without loss activity selectivity.

Language: Английский

Citations

2

Tunable Electrochemical Reactive Carbon Dioxide Capture and Conversion to Produce Syngas Using Highly Dispersed Nickel Catalyst DOI

Peilong Lu,

Shreya Singh, Alexander Gonzalez

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: April 15, 2025

Language: Английский

Citations

0

Challenges and Breakthroughs in Single-Atom Catalysts for Electrocatalytic Nitrate Reduction to Ammonia DOI
Yang Wang, Jin Li, Xiujing Xing

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: May 2, 2025

Language: Английский

Citations

0

Optimization of Dissolution Parameters for GH4738 Scrap via Response Surface Methodology DOI Open Access
Guiqun Liu, Xinyu Fang, Xiaoli Zhang

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(4), P. 793 - 793

Published: Feb. 11, 2025

This study aimed to optimize the electrochemical dissolution process of GH4738 scrap, a Ni-based superalloy, achieve high rate with minimal energy consumption. Using Plackett–Burman design, we identified four key factors from pool eight candidates that significantly influence both and consumption: current density, NiCl2 concentration, electrolysis time, H2SO4 concentration. The steepest ascent method was then applied define region minimized consumption while maximizing rate. Response surface methodology (RSM) used determine central point for further analysis, providing valuable insights optimizing parameters. demonstrated increasing concentration reduced breakdown potential, at an 1.5 mol/L, efficiency achieved interactions among parameters affected performance. Analysis variance (ANOVA) confirmed significant these on behavior superalloys. research contributes understanding scrap provides systematic approach process, which is crucial efficient material recovery laboratory sustainability.

Language: Английский

Citations

0