%0 Journal Article
%T Facile Synthesis of Highly Active Three-Dimensional Urchin-like [email protected] Nanostructures for Improved Methanol and Ethanol Electrochemical Oxidation
%J -
%D 2018
%R https://doi.org/10.1021/acsanm.8b00438
%X 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¨C1, and their mass activities for MOR and EOR are 1614.3 and 1502.3 mA mg¨C1, 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
%U https://pubs.acs.org/doi/10.1021/acsanm.8b00438