Catalyst for preparing methanol through carbon dioxide hydrogenation and preparation method thereof

The invention relates to a catalyst for preparing methanol through hydrogenation of carbon dioxide and a preparation method of the catalyst. The catalyst is characterized in that the chemical formula of the catalyst is AmBnCxOy, wherein A is Cu, In, Rh, Pt or Pd; b is Ni, Co, Cr, Ce, Mo, Mn, Zr or Ti; c is B, Al or Ga; the catalyst is prepared by adopting a coprecipitation method. The catalyst with the chemical formula of AmBnCxOy is adopted, and carbon dioxide and hydrogen are used as raw materials to directly synthesize methanol, so that the defects of low conversion rate, poor selectivity and the like in the reaction of directly converting carbon dioxide into methanol through hydrogenation in the past are overcome. Compared with a commercial Cu/ZnO/Al2O3 catalyst, the catalyst designed by the invention has better catalytic performance in the aspect of directly converting carbon dioxide into methanol through hydrogenation, has outstanding performance in the aspects of stability, catalytic activity and the l