Poison-Resistant PdAg-Based Catalysts for Direct Electrooxidation of Ethylene to Ethylene Oxide

Key Points

• This research aims to develop catalysts that improve the direct electrooxidation of ethylene to ethylene oxide while resisting poisoning by intermediates.
• Design of PdAg alloy catalysts supported on Ag nanowires.
• Application of catalysts in a membrane electrode assembly.
• Performance testing under operational conditions for stability and efficiency.
• Characterization of catalyst structure and active interfaces using in situ spectroscopy.
• Achieved a maximum Faradaic efficiency of 38.5% for ethylene oxide synthesis.
• Demonstrated stable operation for over 6 hours.
• Identified formation of Pd–O–Ag active interface enhancing catalytic activity and resistance to poisoning.

Abstract