Induction of a Proton Gradient across a Gold‐Supported Biomimetic Membrane by Electroenzymatic H 2 Oxidation

Energy‐transduction mechanisms in living organisms, such as photosynthesis and respiration, store light and chemical energy in the form of an electrochemical gradient created across a lipid bilayer. Herein we show that the proton concentration at an electrode/phospholipid‐bilayer interface can be controlled and monitored electrochemically by immobilizing a membrane‐bound hydrogenase. Thus, the energy derived from the electroenzymatic oxidation of H 2 can be used to generate a proton gradient across the supported biomimetic membrane.