Corrosion of ternary Mn–Cu–Au to nanoporous Au–Cu with widely tuned Au/Cu ratio for electrocatalyst
Source abstract
Abstract
Abstract By one-step dealloying a single phase Au 5 Cu 25 Mn 70 alloy, nanoporous AuCu alloys (np-AuCu) with widely tuned Au:Cu ratio are obtained. The one-step corrosion in (NH 4 ) 2 SO 4 solution involves two step dealloying process. The first one is fast dealloying of Mn, resulting in np-Au 16 Cu 84 . The second step is slow etching of Cu, which is used to tune the ratio of Cu/Au on the AuCu nano-ligament surface. Electrochemical measurements exhibit that the electrocatalytic activities of ultrafine np-AuCu towards glucose oxidation and H 2 O 2 reduction depend on the ratios of the Au:Cu. The activities follow the order that np-Au 66 Cu 34 > np-Au 58 Cu 42 > np-Au 78 Cu 22 > np-Au.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Nanoporous metals and alloys · Supercapacitor Materials and Fabrication · Nanomaterials for catalytic reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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