Abstract
We prepared Pt-Ni high-index crystalline nanoparticles with various Pt-Ni molar ratios to study the microscopic morphology and electrochemical properties of these catalysts. The results demonstrated that when Pt: Ni is 1:1, the prepared catalyst has the most uniform morphology and the optimal catalytic activity, as evidenced by an electrochemical active area of 8.546 m2/g, the current density of 1.544 mA/cm2 for ethanol oxide and 1100 s steady state current density of 1.132 mA/cm2. Pt-Ni high-index crystalline nanocatalysts have such high catalytic efficiencies due to the abundance of step atoms and the doping of non-precious metal nickel.
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