Gold Nano-Cages on Graphene support for Sodium Borohydride Electrooxidation

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• 作者：Roudabeh Valiollahi ; Reza Ojani ; ^{fer-o@umz.ac.ir" class="auth_mail" title="E-mail the corresponding author} ; Jahan-Bakhsh Raoof
• 关键词：Gold nano-cages on graphene support ; Silver nano-cubes ; Galvanic replacement ; Electrocatalysis
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：10 February 2016
• 年：2016
• 卷：191
• 期：Complete
• 页码：230-236
• 全文大小：1187 K

文摘

Gold Nano-cages are synthesized via a galvanic replacement reaction between as-prepared silver nano-cubes and Au³⁺ (HAuCl₄) ions. Graphene nano-sheets are synthesized using a chemical procedure and are used as support to immobilize the gold nano-cages. The morphology, surface properties, and composition of the prepared nano-composites are studied using scanning electron microscopy, Bruanauer-Emmett-Teller surface area analysis, and energy dispersion X-ray spectroscopy techniques, respectively. Electrocatalytic activity of the prepared nano-structure toward sodium borohydride oxidation is studied. Gold nano-cages on graphene support show a better electrocatalytic activity than bulk Au electrode.