Issue 36, 2024

Structure-dependent CO2 reduction on molybdenite (MoS2) electrocatalysts

Abstract

Scanning electrochemical cell microscopy (SECCM) is employed to directly identify the structure-dependent electrochemical CO2 reduction reaction (eCO2RR) activity of molybdenite (MoS2) electrocatalysts in an aqueous imidazolium-based aprotic ionic liquid electrolyte. Nanoscale defects, where the edge plane (EP) is exposed, are directly targeted, revealing heightened overall activity (eCO2RR + the competing hydrogen evolution reaction, HER) over the relatively inactive basal plane (BP). In addition, certain types of defects (e.g., step edges) only exhibit heightened activity under a CO2 atmosphere (i.e., compared to N2), indirectly confirming higher selectivity at these surface sites. Overall, this work will guide the bottom-up design of earth-abundant electrocatalysts for use in large-scale CO2 electrolysis.

Graphical abstract: Structure-dependent CO2 reduction on molybdenite (MoS2) electrocatalysts

Supplementary files

Article information

Article type
Communication
Submitted
01 Feb 2024
Accepted
28 Mac 2024
First published
28 Mac 2024

Chem. Commun., 2024,60, 4781-4784

Structure-dependent CO2 reduction on molybdenite (MoS2) electrocatalysts

J. Limb, L. F. Gaudin and C. L. Bentley, Chem. Commun., 2024, 60, 4781 DOI: 10.1039/D4CC00496E

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