Current Opinion in Electrochemistry, Journal Year: 2024, Volume and Issue: unknown, P. 101623 - 101623
Published: Nov. 1, 2024
Language: Английский
Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: 64(9), P. 5087 - 5098
Published: Feb. 21, 2025
Gas bubble adhesion, a ubiquitous phenomenon in electrochemical gas-evolving reactions, reduces the hydrogen evolution reaction (HER) activity water electrolysis. Understanding dynamics of gas detachment and its dependence on force balance is crucial for manipulating departure, but it remains insufficiently investigated. Here, we found that differ markedly between fluidizable stationary electrocatalysts, with electrocatalysts minimizing adhesion showing 37-fold increase HER rate constant. This enhancement attributed to accelerated driven by fluidization effect electrocatalyst particles. Specifically, transition from marks shift flat particulate model, introducing promoting effects arising particle movement spin-induced centrifugal collision-triggered coalescence. Consequently, measured approaches intrinsic value. work highlights as an effective strategy eliminate thereby exposing nearly all active sites electrocatalytic reactions.
Language: Английский
Citations
1
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 4, 2025
MXenes, a family of two-dimensional (2D) materials based on transition metal carbides and nitrides, have desirable properties, such as high conductivity, surface area, tunable groups, for electrocatalysis. Nitride in particular, shown excellent electrocatalytic performance the nitrogen oxygen reduction reactions, but fundamental understanding how their structures evolve during electrocatalysis remains unknown. Equally important yet unknown is effect reactivity lattice vibrational behavior nitride MXenes resulting implications Here, we investigate properties titanium relevant solvents using confocal Raman spectroscopy. We found that modes are attenuated polar solvents, which revealed through alteration scattering solvents. Contrary to remain unchanged nonpolar like hydrocarbons due inactivity nitrogen. this unique nitrides because characteristics sulfides unaffected by solvent types. However, inclusion into carbide structure does exhibit Raman-solvent similar suggesting replacing carbon with affects MXene–light interactions. demonstrated proof-of-concept utilizing enhance reaction ammonia production. In summary, elucidate demonstrate tunability MXene via atom substitution, turn can be exploited advance applications
Language: Английский
Citations
0
Current Opinion in Electrochemistry, Journal Year: 2025, Volume and Issue: unknown, P. 101672 - 101672
Published: Feb. 1, 2025
Language: Английский
Citations
0
Nano Letters, Journal Year: 2025, Volume and Issue: unknown
Published: May 9, 2025
The single nanoparticle (NP) collision strategy offers a promising alternative to traditional ensemble methods in electrocatalysis, providing unique insights into catalytic behavior that cannot be captured by ensemble-based techniques. However, synthesizing colloidal NP catalysts with tunable composition, uniform size, and near-pristine surfaces remains significant challenge. Here, using PtxRu1-x alloys as model system, we propose an innovative combines ultrafast high-temperature precision synthesis ultrasonic exfoliation. This approach enables the preparation of desired properties, which were previously difficult achieve. Single electrocatalysis uncovers composition-dependent intrinsic activity methanol oxidation reaction (MOR) at industrial current densities, bypassing mass transfer limitations. Density functional theory (DFT) calculations highlight Pt-Ru synergistic effect optimizing MOR performance. study, for first time, integrates new framework development highly efficient catalysts.
Language: Английский
Citations
0
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(46), P. 31456 - 31463
Published: Nov. 11, 2024
The photocatalytic performance is primarily determined by carrier separation efficiency. Applying electric fields to enhance efficiency and thereby boost catalytic has emerged as a promising approach. However, the behavior on catalyst particles under was still hardly acknowledged. Herein, using single-molecule fluorescence microscopy with high spatiotemporal resolution, redistribution of carriers an field visualized for first time, which closely related direction intensity field. Single-molecule kinetics redox reactions induced have been further obtained, results showed that external had obvious regulating role in conversion process desorption this work, attributed dynamic carriers. improvement hydrogen evolution reaction (HER) activity supports impact photocatalysis. This work offers new insight into microscopic regulation mechanism provides methods studying structure-activity relationship processes.
Language: Английский
Citations
3
Environmental Science & Technology, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 3, 2024
Heterogeneous hydrogenation is surging as a promising strategy for selective removal of water pollutants, yet numerous efforts rely on catalyst design to advance catalytic activity. Herein, we enhanced the mass transfer and utilization hydrogen reagent through construction two-phase flow-through membrane reaction device (Pd/SiC-MR). Pd/SiC-MR displays high efficiency selectivity toward multiple pollutants. For instance, rapid (∼0.35 s) exclusive (>99%) carbon-chlorine bond in organohalogens were realized at flux (220 L/m
Language: Английский
Citations
2
Current Opinion in Electrochemistry, Journal Year: 2024, Volume and Issue: unknown, P. 101623 - 101623
Published: Nov. 1, 2024
Language: Английский
Citations
1