Nanoporous Au (NPG) is synthesized by de-alloying of electrodeposited Cu-Au thin films.
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Composition independent critical potentials are observed in the de-alloying of said films.
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The NPG in this work features three-fold larger surface area than Ag-Au counterparts.
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Pt coatings render the NPG films highly active formic acid (FA) oxidation catalysts.
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The developed Pt-NPG catalysts feature mass activity of 3–5 A/mg in FA oxidation.
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