| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7894542 | Corrosion Science | 2016 | 6 Pages |
Abstract
By one-step dealloying a single phase Au5Cu25Mn70 alloy, nanoporous AuCu alloys (np-AuCu) with widely tuned Au:Cu ratio are obtained. The one-step corrosion in (NH4)2SO4 solution involves two step dealloying process. The first one is fast dealloying of Mn, resulting in np-Au16Cu84. 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 H2O2 reduction depend on the ratios of the Au:Cu. The activities follow the order that np-Au66Cu34Â >Â np-Au58Cu42Â >Â np-Au78Cu22Â >Â np-Au.
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Authors
X. Li, H.-J. Qiu, J.Q. Wang, Y. Wang,