Effect of particle size on catalytic decomposition of hydrogen peroxide by platinum nanocatalysts

•Rate equation and kinetics of H2O2 decomposition on platinum nanocatalysts.•Effect of particle size on rate of H2O2 decomposition by platinum nanocatalysts.•Effect of surface chemisorbed oxygen on rate of H2O2 decomposition by platinum nanocatalysts.•Methodology for deconvoluting the effect of correlated catalyst properties on catalytic rate of reaction.