▎ 摘　　要

NOVELTY - A nickel zinc copper nanocomposite dehydrogenation catalyst comprises nanocomposite of nickel zinc copper nitrogen-carbon core-shell nanospheres and redox graphene. The core of nickel zinc copper nitrogen-carbon core-shell nanospheres is nickel zinc copper alloy nanospheres. The diameter of the inner core is 10-100 nm. The outer shell is made of nitrogen-carbon material. The thickness of the shell layer is 20-50 nm. USE - The nickel zinc copper nanocomposite dehydrogenation catalyst is used for catalytic dehydrogenation of pyridine to synthesize 2,2'-bipyridyl. ADVANTAGE - The catalyst has high 2,2'-bipyridine yield under the condition of less catalyst dosage. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the catalyst comprising roasting nickel zinc copper layered hydroxide/poly-dopamine/graphene oxide at high temperature under nitrogen atmosphere. The nickel zinc copper layered hydroxide/poly-dopamine/graphene oxide is prepared by hydrothermal reacting graphene oxide and nickel zinc copper layered hydroxide/poly-dopamine. The nickel zinc copper layered hydroxide/poly-dopamine layered hydroxide/poly-dopamine is obtained by self-polymerization reacting dopamine on nickel zinc copper layered hydroxide. The nickel zinc copper layered hydroxide is prepared by hydrothermal reacting nickel salt, zinc salt, and copper salt.