The ability to tune adsorption enthalpy (also referred to as binding energy, BE = -ΔH ads ), requires external stimulus to modify the catalyst, adsorbate, or interacting surface bond. One method of catalyst stimulus is surface strain, which has been shown in static systems (e.g., films on lattice-mismatched substrates) to shift the metal d-band center and alter the adsorption enthalpy of surface adsorbates . Electric fields applied to adsorbed species can also tune the binding energy of adsorbates with benefits for controlling and accelerating catalytic surface chemistry, including externally imposed fields or internal fields arising in electrocatalytic reactors . Other strategies aim to alter the electronic structure of surface metal atoms, such as field-effect modulation with a dielectric and imposed back gate-voltage; this method moves charge carriers into the surface catalyst layer (e.g. metal or metal oxide) to shift the d-band center and ultimately the interaction with surface adsorbates . The impact of these techniques on the relative changes in surface intermediate energies and variation in the gammadelta plot (e.g., Figure ) of two surface adsorbates depends with each combination of surface intermediates, surface material/facet, and type of imposed stimulus which so far has been primarily explored via computation.