Facile Synthesis of Highly Active Three-Dimensional Urchin-like [email protected] Nanostructures for Improved Methanol and Ethanol Electrochemical Oxidation

Exploitation of highly active catalysts for alcohol electrooxidation is urgent for direct alcohol fuel cells (DAFCs). In this research, a facile and mild synthetic approach is utilized to control and tailor the morphology of the three-dimensional (3D) urchin-like [email protected] nanostructures (NSs), and the formation mechanism of the as-prepared nanostructures is expounded in detail. The [email protected] NSs exhibit outstanding electrochemical properties and remarkable durability toward both methanol and ethanol oxidation reaction (MOR and EOR) in alkaline solution. The electrochemically active surface area (ECSA) of the [email protected] NSs is 59.5 m2 g–1, and their mass activities for MOR and EOR are 1614.3 and 1502.3 mA mg–1, respectively, which are much higher than those of their ternary or binary alloy counterparts as well as commercial Pt black catalysts. Moreover, it still retains high current densities after catalyzing 10？000 s, while the current densities of other nanocatalysts reduce to nearly zero. The outstanding electrochemical activities and durability are owing to the specific 3D urchin-like nanostructures providing enormous active sites for catalytic reaction and the synergy effects between Pt, Pd, and Ni atoms. The 3D urchin-like [email protected] NSs will enrich the electrocatalysts for DAFCs