Abstract: The invention provides a process for producing a nanostructure comprising a first metal having a first reduction potential and a second metal having a second reduction potential, the second reduction potential being more negative than the first reduction potential. The process involves a catalyst which is a salt of a reducing metal. The nanostructure may be in the form of a nanowire. The process can provide true nanoalloy products and core-shell nanostructures. The invention further provides a nanoalloy comprising a first metal having a first reduction potential and a second metal having a second reduction potential, the second reduction potential being more negative than the first reduction potential. The invention provides a nanoalloy with an oxide coating. Also provided are a hydrogen storage module and a transparent conductor comprising an optionally oxide-coated nanoalloy according to the invention.