Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 504, P. 158537 - 158537
Published: Dec. 11, 2024
Language: Английский
Desalination, Journal Year: 2024, Volume and Issue: 586, P. 117884 - 117884
Published: June 29, 2024
Language: Английский
Citations
12
JACS Au, Journal Year: 2024, Volume and Issue: 4(3), P. 919 - 929
Published: Feb. 1, 2024
Solvation and ion valency effects on selectivity of metal oxyanions at redox–polymer interfaces are explored through in situ spatial-temporally resolved neutron reflectometry combined with large scale ab initio molecular dynamics. The ReO4– vs MoO42– for two redox-metallopolymers, poly(vinyl ferrocene) (PVFc) poly(3-ferrocenylpropyl methacrylamide) (PFPMAm) is evaluated. PVFc has a higher Re/Mo separation factor compared to PFPMAm 0.6 V Ag/AgCl. In techniques show that both swell the presence (having solvation PFPMAm), but do not contact MoO42–. Ab simulations suggest maintains well-defined double shell ReO4–. more loosely solvated anion (ReO4–) preferably adsorbed by hydrophobic redox polymer (PVFc), electrostatic cross-linking driven divalent anionic interactions could impair film swelling. Thus, in-depth understanding mechanisms can accelerate design ion-selective redox-mediated systems transition recovery recycling.
Language: Английский
Citations
11
JACS Au, Journal Year: 2025, Volume and Issue: 5(3), P. 1221 - 1231
Published: Feb. 27, 2025
Homogeneous platinum catalysts for hydrosilylation are essential the chemical industry and society, through production of commodities such as functional silicones. However, high boiling points products low concentration homogeneous make implementation traditional separation methods difficult. Catalyst loss becomes a core sustainability techno-economic challenge. In addition, highly active platinum-based have remarkable susceptibility to deactivation upon reaction completion. Recently, redox-mediated electrosorption has been successfully demonstrated in number electrically conductive media platform. industrial systems carried out nonconductive media. Therefore, developing an electrochemical recycling system realistic, can be transformative sustainable catalysis manufacturing. Here, we overcome these challenges catalyst by introducing strongly coordinating vinyl ligand enabling Pt solvent-free, nonpolar reactant two distinct loops electrosorbent regeneration. The olefin maintains catalytic activity after prevents particle aggregation, primary mechanism deactivation. stabilized coordinated reversibly adsorbed released electrosorbent, demonstrating 100% retention over 90% release efficiency. A analysis supports economic potential system, with cost savings >5k USD/kgPt. By combining design engineering, demonstrate industrially relevant practical
Language: Английский
Citations
1
ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(8), P. 3887 - 3912
Published: July 17, 2024
Language: Английский
Citations
7
JACS Au, Journal Year: 2024, Volume and Issue: 4(7), P. 2523 - 2538
Published: June 10, 2024
Leveraging specific noncovalent interactions can broaden the mechanims for selective electrochemical separations beyond solely electrostatic interactions. Here, we explore redox-responsive halogen bonding (XB) electrosorption in nonaqueous media, by taking advantage of directional XB alongisde a cooperative and synergistic ferrocene redox-center. We designed evaluated new redox-active donor polymer, poly(5-iodo-4-ferrocenyl-1-(4-vinylbenzyl)-1
Language: Английский
Citations
4
Langmuir, Journal Year: 2025, Volume and Issue: unknown
Published: April 2, 2025
Electrode materials are crucial for the performance of redox-flow desalination (RFD), a promising technology addressing increasing global demand freshwater. However, lack efficient and stable electrode options has hindered its widespread application. To overcome this limitation, we developed polyaniline (PANI)-modified graphite foil electrodes, achieving significant reduction in energy consumption RFD (up to 78.8%). Electrochemically deposited onto surface foil, PANI film improves redox behavior enhances performance. At current density 3 mA cm-2, decreased from 125.44 39.26 KJ mol-1 with modification 207.73 40.11 at 6 cm-2. The modified electrodes also achieved salt removal rates 1.60 3.17 μmol cm-2 min-1 respective densities In addition, demonstrated excellent multicycle long-term stability. These findings pave way development high-performance systems have implications other electrochemical technologies.
Language: Английский
Citations
0
Polymer Chemistry, Journal Year: 2024, Volume and Issue: 15(35), P. 3519 - 3528
Published: Jan. 1, 2024
Cobaltocenium-containing block copolymers were prepared by post-functionalization using a quantitative and block-selective hydroamination reaction. Resulting metallopolymers show micro-phase separated morphology tuneable surface hydrophilicity.
Language: Английский
Citations
1
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 11, 2024
Abstract Fermentative volatile fatty acid (VFA) production is a sustainable approach for waste valorization. However, selective product recovery remains challenging due to the range of VFAs produced and their dilute concentrations, requiring energy‐intensive purification. Membrane‐based electrochemical separations comprise an energy‐efficient continuous platform small molecule separations. At same time, there lack suitable ion‐exchange membranes separating between structurally similar organic acids. Here, bicontinuous polyelectrolyte complex (PEC)‐layered nanofiltration are designed using redox‐mediated electrodialysis. Hydrophobic modification polyelectrolytes via aza‐Michael addition precisely tunes complexation‐induced phase separation behaviors assembled nanostructures. Surface‐confined layer‐by‐layer complexation generates nanoscale PEC active layer with tailored surface properties that inaccessible through bulk complexation. Redox‐mediated electrodialysis nanostructured membrane exhibits enhancement both ion permeability selectivity toward VFAs, notable reduction energy consumption by up 80% compared conventional Treatment synthetic cow manure fermentation effluents showcases 2 4‐fold enrichment simultaneous removal co‐existing acids, as low 1.5 kWh kg −1 . These findings advance understanding interfacial development next‐generation multicomponent
Language: Английский
Citations
1
Joule, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 1, 2024
Language: Английский
Citations
1
Desalination, Journal Year: 2024, Volume and Issue: 583, P. 117674 - 117674
Published: May 1, 2024
Mining and harvesting of valuable components from water or organic phases are urgent challenges. Metallopolymers can show excellent control the binding release target molecules ions without additional external chemical inputs. Here, we report covalent functionalization porous polystyrene microparticles with poly(hydroxyethyl methacrylate) (PHEMA) poly(ferrocenylmethyl (PFMMA) copolymers block via surface-initiated living anionic polymerization to tailor functionality polarity surface. The metallopolymer-decorated particles were characterized by infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray redox-responsiveness was analyzed in different media using cyclic voltammetry. variation enabled investigation influence on electrochemical performance. metallopolymer used as efficient ion-adsorbers ion-exchange materials both static flow measurements, resulting findings compared homopolymer functionalized particles. adsorption fluoride, nitrate, sulfate their selectivity investigated. capacity increased for hydrophilic remained more constant over time. results demonstrate importance controlled design surfaces tailoring ion-adsorption materials. insights structure-property relation immobilization pave way new technologies future electrochemically switchable surfaces.
Language: Английский
Citations
0