The stability of the HGC-bound electrocatalyst 2 under operation was analysed by chronoamperometry, revealing a slow decrease in current to roughly 70 % of the initial value over 30 minutes (Figure ), with significantly higher currents observed than for physisorbed 2 without host present (Figure ). Readsorption of fresh 2 regenerated the catalytic activity of the electrode, which clearly indicates that the host molecules on the electrode surface are intact and can be used to bind fresh catalyst guests. The decrease of current could either be due to slow desorption of the guests or degradation of the HGC-bound catalyst.