PtRu-WO3 alloy nanocomposite electrode for methanol electrooxidation designed by sputtering deposition method

摘要

The excellent catalytic activity of platinum for methanol oxidation, especially, at low temperatures (< 80deg C) makes this metal electrocatalyst ideal for use as an anode in direct methanol fuel cells (DMFCs), which are currently of great interest because of a variety of advantages that include high energy density, ease of handling a liquid, and low operating temperatures. However, it is well known that a pure platinum is readily poisoned by CO, a by-product in methanol electrooxidation, at low temperatures. Accordingly, in order to enhance its catalytic activity for methanol electrooxidation by eliminating or inhibiting the CO poisoning effect, many efforts have been reported to design and synthesize Pt-based alloy catalysts by alloying platinum with 2nd or 3rd elements on the basis of a bifunctional mechanism, electronic, or an ensemble effect.