Exploration of the Copper Active Sites in Electrooxidation of Glucose on a Copper/Nitrogen Doped Graphene Nanocomposite

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• 作者：Jiong Wang ; Ting-Ting Wang ; Feng-Bin Wang ; Dong-Yang Zhang ; Kang Wang ; Xing-Hua Xia
• 刊名：Journal of Physical Chemistry C
• 出版年：2016
• 出版时间：July 28, 2016
• 年：2016
• 卷：120
• 期：29
• 页码：15593-15599
• 全文大小：382K
• 年卷期：0
• ISSN：1932-7455

文摘

Fuel cells applying natural biomass as energy resources are considered to be one type of potential device to substitute traditional energy output of consuming fossil fuels. The practical use of such a device depends on the development of active electrocatalyts preferring to be made of nonprecious elements. Herein, we report a copper nanocomposite with copper nanoparticles and copper(II) ions immobilized on nitrogen-doped graphene, synthesized from a simple pyrolysis approach. The nanocomposite exhibits efficient electrocatalytic capability for glucose oxidation reaction in alkaline electrolytes, and the copper(II) ions are determined as the main active sites. It is shown that the electron density of copper(II) ions, which is tuned by a moderate electron-donating effect from neighboring copper nanoparticles and nitrogen dopants of graphene, might be a general descriptor of electrocatalytic activity.