Correction to “A Smorgasbord of Carbon: Electrochemical Analysis of Cobalt–Bis(benzenedithiolate) Complex Adsorption and Electrocatalytic Activity on Diverse Graphitic Supports”

Immobilized Cobalt Bis(benzenedithiolate) Complexes: Exceptionally Active Heterogeneous Electrocatalysts for Dihydrogen Production from Mildly Acidic Aqueous Solutions

“…It is therefore particularly important that new proton reduction catalysts are tested under bulk electrolysis conditions to obtain a realistic measure of their true electrocatalytic activity and, in particular, stability. Sustained activity above the background current for 2 and 3 after the initial 8 h suggests that either a small percentage of the catalyst remains active indefinitely or a more stable, less active species is formed under turnover conditions after the first 6–8 h. These results are particularly interesting in comparison to our previous studies on bulk (not highly ordered) graphite, which show no Co 2p signal by XPS after the plateau current is reached in analogous electrolysis studies . A similar result is obtained here for 2 (see Figure S4).…”

“…In some of the repeated trials, even the initial current increase was absent for 5 and 6 upon acid addition, and the original redox feature was no longer observed, suggesting catalyst desorption or decomposition. Previous results indicate that the catalysts simply desorb from the surface over time and that this is the main reason for the loss of activity . For complexes 1 – 4 , activity saturation was not observed up to a TFA concentration of 2 mM (pH 2.7).…”