Which emperors ceated coins made of lead mixed with gold to increase the supply of money at home?

Several Roman emperors, particularly during times of economic strain, created coins made of lead mixed with gold to increase the money supply. Notably, emperors like Nero and later ones in the 3rd century AD resorted to debasing the currency as a means to address financial challenges. This practice, while initially providing short-term relief, ultimately led to inflation and a loss of trust in the currency.