Self-assembly of Bi^III ultrathin layer on Pt surface for non-enzymatic glucose sensing

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• 作者：Yuqing Miao ; Zhuoyuan Yang ; Xiaoyan Liu ; Lina Xu ; Lei Ouyang ; Yingying Gu ; Haizhou Chang ; Ruizhuo Ouyang
• 关键词：Bismuth ; Non-enzymatic glucose sensing ; Self-assembly
• 刊名：Electrochimica Acta
• 出版年：30 November, 2013
• 年：2013
• 卷：111
• 期：Complete
• 页码：621-626
• 全文大小：1191 K

文摘

Bismuth has been attracting research interest in recent decades due to its unique properties. Especially, there is a great difference for bismuth between its surface and bulk material properties in which the surfaces are much better metals than the bulk. A ultrathin layer of bismuth was adsorbed onto platinum electrode surface by simple self-assembly. Compared with bare platinum electrode, two greatly increased oxidation peaks were observed at negative and positive potential area with the obtained Bi^III-Pt electrode, where Bi⁰ or Bi^III tends to adsorb more OH which is shared by the below adjacent platinum atom to form a structure of Pt-OH with high electrocatalytical activity. The Bi^III-Pt electrode gives high sensitivity and excellent linearship of non-enzymatic glucose sensing, showing potential application for fuel cell, electrocatalysis and electroanalysis.