Rapid Selective Electrocatalytic Reduction of Carbon Dioxide to Formate by an Iridium Pincer Catalyst Immobilized on Carbon Nanotube Electrodes

Abstract An iridium pincer dihydride catalyst was immobilized on carbon nanotube‐coated gas diffusion electrodes (GDEs) by using a non‐covalent binding strategy. The as‐prepared GDEs are efficient, selective, durable, gas permeable electrodes for electrocatalytic reduction of CO 2 to formate. High turnover numbers (ca. 54 000) and turnover frequencies (ca. 15 s −1 ) were enabled by the novel electrode architecture in aqueous solutions saturated in CO 2 with added HCO 3 − .