Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6612080 | Electrochimica Acta | 2015 | 5 Pages |
Abstract
The unique Au nanosheets (Au NSs) are electrodeposited uniformly on Ni foam substrate via a one-step potentiostatic electrodeposition technique. The electrode is characterized by scanning electron microscopy equipped with energy dispersive X-ray spectrometer and X-ray diffractometer. It shows a unique open structure allowing the full utilization of Au surface active sites. NaBH4 electrooxidation in KOH solution on the Au NSs/Ni foam electrode are studied by linear sweep voltammetry and chronoamperometry. The electrode exhibits a high catalytic performance outperforming the Au particles made by the same method. At the oxidation potential of 0Â V, the current density of 827Â mAÂ cmâ2 can be achieved on Au NSs/Ni foam electrode, and only 219Â mAÂ cmâ2 was obtained on Au NPs/Ni foam electrode, indicating that the catalytic activity is increased by 278%, which is attributed to the porous 3D structure, ensuring the full utilization of Au surfaces. Besides, H2 generated by NaBH4 hydrolysis can quickly diffuse away from the electrode, preventing surface active sites of Au from blocking by adsorbed gas bubbles.
Related Topics
Physical Sciences and Engineering
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Authors
Fan Yang, Kui Cheng, Guiling Wang, Dianxue Cao,