▎ 摘　　要

NOVELTY - Composition comprises a treated iron ore catalyst. USE - The treated iron core is useful for producing: hydrogen and graphene (claimed); and other carbon-containing products such as carbon nanomaterials, carbon nanotubes and carbon nano onions. ADVANTAGE - The composition utilizes treated iron core catalyst that: exhibits high catalyst activity with a long lifetime, hence it is superior over conventional catalysts; produces hydrogen without contamination of carbon oxide(s), and high-value graphene; can be prepared in an economically feasible manner; and can be regenerated at low cost. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing (M1) a treated iron ore catalyst, comprising dehydrating an iron ore, milling the iron ore to a particle size, and reducing the iron ore to form a treated iron ore catalyst; and (2) using a treated iron ore catalyst, comprising contacting a feed gas with a treated iron ore catalyst to produce hydrogen and graphene.