Science China Chemistry, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 25, 2024
Language: Английский
Small, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 31, 2025
Diatomic catalysts are promising for the electrochemical CO2 reduction reaction (CO2RR) due to their maximum atom utilization and presence of multiple active sites. However, atomic-scale design diatomic elucidation synergistic catalytic mechanisms between centers remain challenging. In this study, heteronuclear Fe─In sites anchored on nitrogen-doped carbon (FeIn DA/NC) constructed. The FeIn DA/NC electrocatalyst achieves a CO Faradaic efficiency exceeding 90% across wide range applied potentials from -0.4 -0.7 V, with peak 99.1% at -0.5 V versus reversible hydrogen electrode. situ, attenuated total reflection surface-enhanced infrared absorption spectroscopy density functional theory calculations reveal that interaction Fe induce an asymmetric charge distribution, which promote adsorption site lowered energy barrier formation *COOH. Moreover, unique structure increase *OH through bridging interaction, decrease water dissociation further promoted CO2RR activity.
Language: Английский
Citations
1
New Journal of Chemistry, Journal Year: 2025, Volume and Issue: 49(6), P. 2201 - 2208
Published: Jan. 1, 2025
Aerogels were prepared by reducing metal precursors with NaBH 4 . The black precipitate obtained was left standing at room temperature until no more bubbles observed. then freeze-dried overnight to remove water molecules.
Language: Английский
Citations
0
Frontiers in Nanotechnology, Journal Year: 2025, Volume and Issue: 6
Published: Jan. 15, 2025
This study presents the rational synthesis of Cu-supported doped-CeO 2 catalysts designed for oxidation benzylamine, both in absence and presence 1,2-diaminobenzene. The were prepared using a two-step method characterized by various techniques, including XRD, Raman spectroscopy, BET surface area analysis, NH 3 -TPD, pyridine-FTIR, H -TPR, XPS, SEM, TEM. XPS analyses confirmed oxygen vacancy sites, with CuO/CeO -ZrO displaying highest concentration these sites. -TPR revealed strong metal-support interactions, while -TPD indicated that possessed greatest number acidic pyridine-FTIR results indicates sites present on catalyst surface. Cu/CeZr sample exhibits lowest I u /// /I Total ratio (0.0567) compared to Cu/Ce (0.0843) Cu/CeSi (0.0672) samples, indicating higher Ce 3+ species or greater defect sample. demonstrated excellent performance converting benzylamine imines was also highly effective benzimidazole from 1,2-diaminobenzene, broadening its application potential. superior catalytic activity is attributed abundant vacancies, redox properties, Furthermore, maintained efficiency over five consecutive cycles, exhibiting robustness, high functional group tolerance, reduced reaction times, making it promising system diverse applications.
Language: Английский
Citations
0
Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162483 - 162483
Published: April 1, 2025
Language: Английский
Citations
0
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 12, 2024
Abstract Cuprous oxide (Cu 2 O)‐based catalysts present a promising activity for the electrochemical nitrate (NO 3 − ) reduction to ammonia (eNO RA), but instability of Cu + species may lead an unsatisfactory durability, hindering exploration structure‐performance relationship. Herein, we propose efficient strategy stabilize through incorporation Cr 4+ into O matrix construct −O−Cu network structure. In situ and quasi‐in characterizations reveal that are well maintained via strong interaction inhibits leaching lattice oxygen. Importantly, in generated 3+ from is identified as dual‐active site eNO RA, wherein sites responsible activation N‐containing intermediates, while assisting centers serve electron‐proton mediators rapid water dissociation. Theoretical investigations further demonstrated metastable state favors conversion endoergic hydrogenation key *ON intermediate exoergic reaction ONH pathway, facilitates subsequent NH desorption with low energy barrier. The superior RA maximum 91.6 % Faradaic efficiency could also be coupled anodic sulfion oxidation achieve concurrent production sulfur recovery reduced input.
Language: Английский
Citations
3
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 28, 2024
Abstract The high entropy alloy (HEA) possesses distinctive thermal stability and electronic characteristics, which exhibits substantial potential for diverse applications in electrocatalytic reactions. nanosize of HEA also has a significant impact on its catalytic performance. However, accurately controlling synthesizing small nanomaterials remains challenge, especially the ultrasmall nanoparticles. Herein, we firstly calculate illustrate size structure as well adsorption energies crucial intermediates involved typical processes, such hydrogen evolution reaction (HER), oxygen reduction (ORR), CO 2 electroreduction (CO RR) NO 3 − (NO RR). Under guidance theoretical calculations, synthesize range PtRuPdCoNi nanoparticles with adjustable sizes (1.7, 2.3, 3.0, 3.9 nm) using one‐step spatially confined approach, without any further treatment. Experimentally, smaller HEAs is more favorable HER ORR performances, aligning predictions. Specifically, sized at 1.7 nm (HEA‐1.7) endows 16 mV overpotential current density 10 mA cm −2 , yielding mass activity 31.9 A mg NM −1 noble metal HER, significantly outperforming commercial Pt/C catalyst. This strategy can be easily applicable to other reactions (e.g. ) attributed richness components adjustability, presenting promising platform various advanced catalysts.
Language: Английский
Citations
3
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: Dec. 30, 2024
Electrochemical nitrate reduction reaction offers a sustainable and efficient pathway for ammonia synthesis. Maintaining satisfactory Faradaic efficiency long-term under ampere-level current density remains challenging due to the inevitable hydrogen evolution, particularly in pure solutions. Herein, we present application of electron deficiency Ru metals boost repelling effect counter K
Language: Английский
Citations
3
Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 12, 2024
Abstract Cuprous oxide (Cu 2 O)‐based catalysts present a promising activity for the electrochemical nitrate (NO 3 − ) reduction to ammonia (eNO RA), but instability of Cu + species may lead an unsatisfactory durability, hindering exploration structure‐performance relationship. Herein, we propose efficient strategy stabilize through incorporation Cr 4+ into O matrix construct −O−Cu network structure. In situ and quasi‐in characterizations reveal that are well maintained via strong interaction inhibits leaching lattice oxygen. Importantly, in generated 3+ from is identified as dual‐active site eNO RA, wherein sites responsible activation N‐containing intermediates, while assisting centers serve electron‐proton mediators rapid water dissociation. Theoretical investigations further demonstrated metastable state favors conversion endoergic hydrogenation key *ON intermediate exoergic reaction ONH pathway, facilitates subsequent NH desorption with low energy barrier. The superior RA maximum 91.6 % Faradaic efficiency could also be coupled anodic sulfion oxidation achieve concurrent production sulfur recovery reduced input.
Language: Английский
Citations
2
Cell Reports Physical Science, Journal Year: 2024, Volume and Issue: 5(10), P. 102246 - 102246
Published: Oct. 1, 2024
Language: Английский
Citations
0
Chemical Physics Reviews, Journal Year: 2024, Volume and Issue: 5(4)
Published: Nov. 25, 2024
In recent decades, economic growth and the growing demand for limited resources have prompted a global search more environmentally friendly sustainable raw materials production of chemicals, materials, fuels. Compared with traditional fossil fuel feedstocks, whose upgrading features high temperature, pressure sever greenhouse gas footprint, biomass-derived platform molecules various functional groups are achievable at room temperature ambient emerging electrocatalytic hydrogenation (ECH) technology. The selectivity conversion rate ECH can be manipulated by adjusting optimizing electrode material composition electrolyte. This review summarizes progress made in biomass different (such as 5-hydroxymethylfurfural, furfural, levulinic acid) into chemicals fuels across systems. It introduces two mechanisms reaction systematically reviews those on both noble metal electrocatalysts (Pt, Pd, Ag, Ru, etc.) non-noble (Cu, Pb, Sn, etc.). Finally, current challenges unresolved issues presented. will provide useful insights guideline rational design high-performance selective molecules.
Language: Английский
Citations
0