Carbon Monoxide Gas Diffusion Electrolysis that Produces Concentrated C2 Products with High Single-Pass Conversion

Abstract

In the calculation of the vol% ethylene values in the main text, the volumetric rate of CO consumed for ethylene production was inadvertently used as the volumetric rate of C 2 H 4 production without including the 1 / 2 conversion factor. The corrected values are as follows.

Designing materials for electrochemical carbon dioxide recycling

“…This is challenging in typical aqueous systems because CO 2 would be converted to carbonate species before reaching the electrocatalyst surface. Gas diffusion flow cells are effective for dramatically increasing current densities, commonly to 200-400 mA cm -2 , both for C 1 and C 2 product generation [39][40][41][42][43][44][45] . Furthermore, the structure of the polymer layer and catalyst provides an important handle for manipulating catalysis: changing the thickness of the polymer and catalyst layer enabled the synthesis of ethylene at >70% Faradaic efficiency at only -0.55 V versus RHE using polycrystalline copper as the catalyst 42 .…”

“…Data are adapted from refs. 19,29,[40][41][42][43][44][45][46][47]65,72,75,79 . architectures and judicious nanostructuring have enhanced current densities to reach 200-400 mA cm -2 .…”

Strategies in catalysts and electrolyzer design for electrochemical CO2reduction toward C2+products

“…In early stage, the working electrodes are nonporous metal foils and suffer from sluggish mass transfer (26,105). As a result, GDE was proposed to alleviate the poor cell performance by providing hydrophobic channels that facilitate CO 2 diffusion to catalyst particles (121). The conventional GDE usually comprises a catalyst layer (CL) and a gas diffusion layer (GDL), as shown in the lower part of Fig.…”

“…The GDL assembled with porous materials (typically carbon paper) could provide abundant CO 2 pathways and ensure rapid electrolyte diffusion rate. It also acts as a low-resistance transportation medium for protons, electrons, and reduction products from the CL into the electrolyte (121). Drop casting, airbrushing, and electrodeposition are the common technologies for preparation of GDEs (122).…”

The Role of Atomic Carbon in Directing Electrochemical CO(2) Reduction to Multicarbon Products

“…4 To optimize Cu-based catalysts or find alternative materials for selective C2(+) production from CO (2), in-depth mechanistic insight is needed in order to untangle the complexities of CO(2)R. 5 Recent experimental efforts have focused on improving the selectivity towards C2(+) products on Cu by tailoring catalyst composition, [6][7][8][9] the surface morphology, [10][11][12][13] the reaction conditions at the catalyst/electrode interface, 14,15 and by engineering the electrochemical reactors. [16][17][18] To identify key intermediates and tie into theoretical efforts, in situ or operando characterization tools have been employed, 15,19 but the precise mechanism of the first C-C bond formation is still inconclusive.…”