23 research outputs found
Activity and Selectivity for O-2 Reduction to H2O2 on Transition Metal Surfaces
Industrially viable electrochemical production of H2O2 requires active, selective and stable electrocatalyst materials to catalyse the oxygen reduction reaction to H2O2. On the basis of density functional theory calculations, we explain why single site catalysts such as Pd/Au show improved selectivity over pure metals such as Au. </jats:p
Unveiling the local composition of Pd-Hg alloy nanoparticles by Scanning Transmission Electron Microscopy and Spectroscopy
Acetaldehyde as an intermediate in the electroreduction of carbon monoxide to ethanol on oxide-derived copper
Acetaldehyde as an Intermediate in the Electroreduction of Carbon Monoxide to Ethanol on Oxide-Derived Copper
Oxideâderived copper (ODâCu) electrodes exhibit unprecedented CO reduction performance towards liquid fuels, producing ethanol and acetate with >50â% Faradaic efficiency at â0.3â
V (vs. RHE). By using static headspaceâgas chromatography for liquid phase analysis, we identify acetaldehyde as a minor product and key intermediate in the electroreduction of CO to ethanol on ODâCu electrodes. Acetaldehyde is produced with a Faradaic efficiency of â5â% at â0.33â
V (vs. RHE). We show that acetaldehyde forms at low steadyâstate concentrations, and that free acetaldehyde is difficult to detect in alkaline solutions using NMR spectroscopy, requiring alternative methods for detection and quantification. Our results represent an important step towards understanding the CO reduction mechanism on ODâCu electrodes