▎ 摘　　要

NOVELTY - Catalyst is a graphene-supported metal ferrite and a metal oxide catalyst, wherein, based on the quality of the graphene carrier, the loading of the metal ferrite is 4-10 wt.%, preferably 5-7 wt.%. The loading of metal oxide is 10-25 wt.%, preferably 15-20 wt.%. USE - Catalyst for preparing β-carotene from vitamin A triphenylphosphine salt by electrochemistry (claimed). ADVANTAGE - The catalyst is prepared with high product yield, and simultaneously avoids the use of oxidants in the traditional process, high safety, green and environmental protection. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for electrochemically preparing β-carotene from vitamin A triphenylphosphine salt, which involves using an aqueous solution of vitamin (A) triphenylphosphine salt as electrolyte, or catalyst and an alkali, and carrying out electrolytic reaction to obtain β-carotene.