Following the reabsorption of the catalysts, a subsequent round of catalysis can be performed, yielding similar results to the first absorption (Table , 2 nd Absorption and Table ). FE and TON's were in the same range as the initial absorption, for the three systems. In an effort to push the host-guest-modified electrodes to their limits, electrocatalysis was conducted at pH 1 (0.1 M H2SO4) and pH 0 (1 M H2SO4). Experiments at pH 1 demonstrated successful catalysis with reduced product formation compared to previous examples at pH 2.4 (Table ). Moreover, it became evident that the binding of PA [6] to mITO was less stable at this pH, as indicated by decreased catalytic performance for the 2 nd absorption, reaching only approximately 80% of the initial results. At pH 0, PA [6] was desorbed from the electrode almost instantaneously, with no observable catalytic current. To evaluate the stability and catalytic performance of electrodes modified with a PA [6] host-guest complex for reactions under alkaline conditions, ammonia oxidation experiments were conducted. CV traces of anchored guest 1 and bare mITO were recorded in neutral aqueous NaClO4 electrolyte, revealing a broad redox feature at around 0.7 V vs. NHE for the oxidation of the Ru core in 1 (Figure , red) compared to the bare electrode (black).