Growth of Copper Nanocubes on Graphene Paper as Free-Standing Electrodes for Direct Hydrazine Fuel Cells

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• 作者：Hongcai Gao ; Yuxi Wang ; Fei Xiao ; Chi Bun Ching ; Hongwei Duan
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：April 12, 2012
• 年：2012
• 卷：116
• 期：14
• 页码：7719-7725
• 全文大小：399K
• 年卷期：v.116,no.14(April 12, 2012)
• ISSN：1932-7455

文摘

We have developed a new type of flexible electrodes based on Cu nanocube-decorated free-standing graphene paper (GP) using a facile electrodeposition method. The Cu nanocubes鈥揼raphene paper (Cu鈥揋P) hybrid electrode processes remarkable electrocatalytic activity with an onset potential of 鈭?.10 V toward hydrazine oxidation in alkaline solutions and can serve as the catalyst layer for direct hydrazine fuel cells. One interesting finding is that a copper hydroxide/oxide layer in situ formed on Cu nanocube surfaces plays an important role in enhancing the electrocatalytic activity and durability of the electrocatalyst. A totally irreversible and diffusion-controlled oxidation of hydrazine occurs on the electrocatalyst, eventually leading to environmentally friendly products such as nitrogen and water.