Composite catalyst for alkaline fuel cell, preparation method of composite catalyst and alkaline fuel cell

The invention provides a composite catalyst for an alkaline fuel cell, a preparation method of the composite catalyst and the alkaline fuel cell, and relates to the technical field of fuel cells. The composite catalyst comprises an M-N-C type catalyst, platinum group noble metal nanoparticles and CeOx nanoparticles, M comprises non-noble metal, the platinum group noble metal nanoparticles are loaded on the surface of the M-N-C type catalyst to form a noble metal/non-noble metal composite catalyst, and the CeOx nanoparticles are loaded on the surface of the noble metal/non-noble metal composite catalyst. The catalyst is of a Pt group metal/M-N-C/CeOx composite structure, precious metal nanoparticles with small diameters can be formed and dispersed uniformly, the catalytic activity is improved, water retention of a cathode catalyst layer is facilitated, the CeOx nanoparticles can eliminate intermediate-state free radicals formed by non-precious metals in the oxygen reduction reaction process, and the oxygen red