Investigation of the underpotential deposition of lead on gold in basic and acidic room-temperature chloroaluminate molten salts

The underpotential deposition (UPD) of lead on polycrystalline gold was used to investigate the characteristics of the electrochemical quartz crystal microbalance (EQCM) in room-temperature chloroaluminate molten salts. The bulk and UPD reduction of lead on gold was observed in both acidic and basic molten salts. The mass of the lead UPD in both acidic and basic melts, as determined from both EQCM charge and frequency data, were essentially identical. These data indicate that the EQCM is well behaved in these systems.