Quartz crystal microbalance (QCM) study of electrochemical CO₂ reduction on Sn electrocatalysts

The extenuation of CO₂ emissions using electrochemical CO₂ reduction (ECR) is a promising approach. Electrochemical routes offer a number of benefits, including customizable layout, precise product modification, mild operational temperatures, and the ability to combine CO₂ reduction with the production of renewable electricity. Nevertheless, the essential technique for reprocessing CO₂ as a renewable resource is electrochemical CO₂ reduction, yet CO₂ adsorption/reduction on catalyst surfaces is challenging. To address these concerns, Mn₃O₄ and Sn were produced in this work at room temperature via an electrodeposition technique, which was combined with a quartz crystal microbalance (QCM) sensor suitable for room-temperature monitoring of ECR. QCM is a compelling technique for closely inspecting the responses of CO₂ reduction in real time under various applied conditions. QCM was used for the first time to study the effects of Sn electrocatalysts for ECR research, and revealed the CO₂ adsorption/reduction capabilities of diverse Sn catalysts. A broad investigation showed the CO₂ reduction detecting ability of Sn coated QCM sensors at room temperature. The final results revealed that Sn catalysts' capacity to reduce CO₂ was evident both with and without CO₂ present in the solution of sodium bicarbonate electrolyte. For all the appropriate conditions, the effect of CO₂ saturated electrolyte solution on the frequency and mass change with time along with applied potential were discussed in detail.

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Published in: International Journal of Hydrogen Energy
License: http://creativecommons.org/licenses/by/4.0/
See article on publisher's website: https://dx.doi.org/10.1016/j.ijhydene.2025.02.315