All reagents and solvents were
of commercial reagent grade and were used without further purification,
except where noted. Reagents not listed were purchased from Sigma-Aldrich.
4-(2-Aminomethyl) pyridine (98%), 4-methylpyridine (99%), 4-propylpyridine,
4-aminopyridine (98%), potassium ferrocyanide(III) (99%), sodium nitrite
(97%), silver nitrite (99%), deuterium oxide (D2O), (>99.8%
D), and potassium bicarbonate (99.7%) were purchased from Sigma-Aldrich
Company. All aqueous solutions were prepared using Millipore water
(18.2 MΩ cm). The glassy carbon surface was polished with 1,
0.3, and 0.05 μm alumina slurries. The electrodes were then
ultrasonicated in acetone, ethanol, and water.
of commercial reagent grade and were used without further purification,
except where noted. Reagents not listed were purchased from Sigma-Aldrich.
4-(2-Aminomethyl) pyridine (98%), 4-methylpyridine (99%), 4-propylpyridine,
4-aminopyridine (98%), potassium ferrocyanide(III) (99%), sodium nitrite
(97%), silver nitrite (99%), deuterium oxide (D2O), (>99.8%
D), and potassium bicarbonate (99.7%) were purchased from Sigma-Aldrich
Company. All aqueous solutions were prepared using Millipore water
(18.2 MΩ cm). The glassy carbon surface was polished with 1,
0.3, and 0.05 μm alumina slurries. The electrodes were then
ultrasonicated in acetone, ethanol, and water.