Here R is the ideal gas constant, F is Faraday's constant, 𝜂 ! is the overpotential or driving force for the electrochemical reaction j, T is the absolute temperature, 𝛼 $,! is the transfer coefficient, and 𝑖 ",! is the exchange current density. In Equation ( ) there are two important parameters, the transfer coefficient (𝛼 $,! ) that describes the sensitivity of the product current density to changes in the overpotential (i.e., the electrochemical driving force) and the exchange current density (𝑖 ",! ), the pre-factor for the exponential term. It is important to note that the exchange current density contains explicit concentration dependences on the reactants and products of a given reaction, as discussed in Section S3 of the SI. Many studies of electrochemical synthesis report the Tafel slope, which is directly related to the transfer coefficient defined as the overpotential required to obtain a ten-fold increase in product current density. Tafel Slope = -log(10