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A continuous CO2 vapor-fed electrochemical cell prototype that performs CO2Rwith high faradaic efficiency for desired carbon products for up to 72 hours ofoperation is presented. The cell design facilitates a flow throughconfiguration, capitalizing on gas diffusion electrode (GDE) and membraneelectrode architecture (MEA) without requiring a catholyte. We demonstratestable performance and design adaptability by incorporating various CO2Rcatalysts and membranes into the cell, investigating lifetime performance andselectivity under established experimental conditions. With an Ag foil and PPOanion exchange membrane, the design achieves an average current density of-30mA/cm2 and FE ~80% for CO obtained over a 12-hour duration. With a Cu-basedcatalyst, FE ~40% selectivity for ethylene was achieved. The unique geometryand flexibility of the cell provides an adaptive and dynamic GDEelectrochemical cell framework, easing future research for novelelectro-catalysts on GDE electrodes and MEA/GDE assemblies for enhanced(photo)electrochemical carbon dioxide reduction.

Development of a low flow vapor phase electrochemical reactor without catholyte reliance for CO2 electrolysis to high value carbon products