Cyanide-free electrolyte for Au(III) and Au(I) electrodepositing using DMH as complexing agent

A novel cyanide-free electrolyte is reported for electrodepositing bright gold layers from a solution of both Au(III) and Au(I). Gold electroplating in Au(I) electrolytes displayed instantaneous nucleation at pH = 8, 9, progressive nucleation at pH = 10. Gold electrodeposition in Au(III) electrolytes displayed progressive nucleation at pH = 8, instantaneous nucleation at pH = 10.