Aqueous TiO Nanoparticles React by Proton-Coupled Electron Transfer.

Redox reactions of aqueous colloidal TiO 4 nm nanoparticles (NPs) have been examined, including both citrate-capped and uncapped NPs (-TiO and -TiO). Photoreduction gave stable blue colloidal -TiO NPs with 10-60 electrons per particle. Equilibration of these reduced NPs with soluble redox reagents such as methylviologen (MV) provided measurements of the colloid reduction potential as a function of pH.

Iron Porphyrin Allows Fast and Selective Electrocatalytic Conversion of CO to CO in a Flow Cell.

Molecular catalysts have been shown to have high selectivity for CO electrochemical reduction to CO, but with current densities significantly below those obtained with solid-state materials. By depositing a simple Fe porphyrin mixed with carbon black onto a carbon paper support, it was possible to obtain a catalytic material that could be used in a flow cell for fast and selective conversion of CO to CO. At neutral pH (7.