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Facile synthesis of PdCu echinus-like nanocrystals as robust electrocatalysts for methanol oxidation reaction.

Exploiting high-performance and inexpensive electrocatalysts for methanol electro-oxidation is conductive to promoting the commercial application of direct methanol fuel cells. Here, we present the facile synthesis of echinus-like PdCu nanocrystals (NCs) via a one-step and template-free method. The echinus-like PdCu NCs possess numerous straight and long branches which can provide abundant catalytic active sites. Owing to the novel nanoarchitectures and electronic effect of PdCu alloy, the echinus-like PdCu NCs manifest eminent electrocatalytic performances toward methanol oxidation reaction in alkaline mediums. The mass activity of echinus-like PdCu NCs is 1202.1 mA mg Pd -1 , which is 3.7 times of Pd/C catalysts. In addition, the echinus-like structure as a kind of three-dimensional self-supported nanoarchitectures endows PdCu NCs with significantly enhanced stability and durability. Hence, the echinus-like PdCu NCs have a prospect of being employed as electrocatalysts for direct alcohol fuel cells.