Direct Electrooxidation of Ethylene to Ethylene Glycol over 90% Faradaic Efficiency Enabled by Cl^– Modification of the Pd Surface

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: March 14, 2025

Direct electrochemical ethylene-to-ethylene glycol (C2H4-to-EG) conversion can potentially reduce the consumption of fossil fuels and emission carbon dioxide (CO2) compared with traditional thermo-catalytic approach. Palladium (Pd) prepared by electrodeposition is represented as a promising electrocatalyst; however, it exhibits low Ethylene (EG) current density (<4 mA cm-2), Faradaic efficiency (<60%), productivity (<10 μmol h-1), hindering practical applications. Herein, we report nanodendrite palladium catalyst supported on large-area gas diffusion electrode. This gives high EG (12 cm-2) (227 h-1) but (65%). With further Cl- ions modification, increased to record-high value 92%, (18 (∼340 were also promoted. Experimental data suggest that strong electron-withdrawing feature reduces oxidation ability in situ generated Pd-OH species, inhibiting overoxidation aldehyde. Meanwhile, alters adsorption configuration─from parallel dual-site coordination vertical single-site coordination─over Pd surface, thus preventing C-C bond cleavage CO2. In addition, facilitates generation active species improve catalytic activity. work demonstrates great potential surface ion modification for improving activity selectivity direct C2H4-to-EG conversion, which may have implications diverse value-added chemicals electrosynthesis.

Language: Английский

Bridge‐Oxygen Bond: An Active Group for Energy Electrocatalysis

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

Published: March 20, 2025

Abstract Energy electrocatalytic reactions such as hydrogen evolution reaction, oxygen reduction nitrogen carbon etc., are important to solve the current energy shortage and increasing environmental problems. Developing novel efficient catalyts for these has become an essential urgent issue. Catalysts incorporating bridge‐oxygen bond have received attention due their superior conductivity stability, which favorable optimizing reaction mechanism improving kinetics. This paper provides a comprehensive review encompassing concept of bond, means characterization, activity in electrocatalysis effect on catalytic performance. Through this review, it is expected furnish valuable reference rational design catalysts featuring structure across diverse reactions.

Language: Английский