A highly active nickel electrocatalyst shows excellent selectivity for CO2 reduction in acidic media Non-aqueous Spectroelectrochemistry of Dioxygen for Alkali Metal-Oxygen Batteries Solvent-Mediated Control of the Electrochemical Discharge Products of Non-Aqueous Sodium-Oxygen Electrochemistry Influence of Tetraalkylammonium Cation Chain Length on Gold and Glassy Carbon Electrode Interfaces for Alkali Metal-Oxygen Batteries