Noble metal oxide cluster catalyst anchored on cobalt-based nanosheets and preparation methods thereof

A preparation method for a noble metal oxide cluster catalyst anchored on cobalt-based nanosheets, comprising:

• mixing a cobalt acetate solution, a metal salt solution, ammonium metavanadate, and acetylene black uniformly, stirring at a temperature in a range of 50 °C to 100 °C, and filtering to collect a sample;
• wherein,
• a metal species involved in the metal salt solution includes at least one of Ru, Pd, or Pt;
• and
• subjecting the sample to vacuum drying, and pyrolyzing the sample under air atmosphere, to obtain the noble metal oxide cluster catalyst anchored on cobalt-based nanosheets;
• wherein,
• a concentration of the cobalt acetate solution is in a range of 0.05 mol/L to 0.07 mol/L;
• a volume ratio of the cobalt acetate solution to the metal salt solution is in a range of 3:1 to 20:1;
• a mass ratio of the ammonium metavanadate to the acetylene black is in a range of 1:1 to 10:1;
• the catalyst obtained by the preparation method includes ultrathin nanosheets having a thickness in a range of 1 nm to 3 nm;
• the noble metal oxide loaded on the cobalt-based nanosheets is in a form of nanoclusters;
• a loading amount of noble metal is in a range of 0.8 wt% to 5.1 wt%;
• and
• an average particle size of the noble metal oxide nanoclusters loaded on the cobalt-based nanosheets is in a range of 0.7 nm to 1.5 nm.