Details

Autor(en) / Beteiligte

• Watkins, Nicholas B.
• Lai, Yungchieh
• Schiffer, Zachary J.
• Canestraight, Virginia M.
• Atwater, Harry A.
• Agapie, Theodor
• Peters, Jonas C.
• Gregoire, John M.

Titel

Electrode Surface Heating with Organic Films Improves CO2 Reduction Kinetics on Copper

Ist Teil von

• ACS energy letters, 2024-04, Vol.9 (4), p.1440-1445

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2024

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Management of the electrode surface temperature is an understudied aspect of (photo)­electrode reactor design for complex reactions, such as CO2 reduction. In this work, we study the impact of local electrode heating on electrochemical reduction of CO2 reduction. Using the ferri/ferrocyanide open circuit voltage as a reporter of the effective reaction temperature, we reveal how the interplay of surface heating and convective cooling presents an opportunity for cooptimizing mass transport and thermal assistance of electrochemical reactions, where we focus on reduction of CO2 to carbon-coupled (C2+) products. The introduction of an organic coating on the electrode surface facilitates well-behaved electrode kinetics with near-ambient bulk electrolyte temperature. This approach helps to probe the fundamentals of thermal effects in electrochemical reactions, as demonstrated through Bayesian inference of Tafel kinetic parameters from a suite of high throughput experiments, which reveal a decrease in overpotential for C2+ products by 0.1 V on polycrystalline copper via 60 °C surface heating.