Electrochemistry and electrocatalysis of myoglobin on electrodeposited ZrO2 and graphene-modified carbon ionic liquid electrode

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• 作者：Wencheng Wang ; Xiaoqing Li ; Xiaohua Yu…
• 关键词：Graphene ; Zirconia nanoparticle ; Myoglobin ; Direct electrochemistry ; Electrocatalysis
• 刊名：Journal of the Iranian Chemical Society
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：13
• 期：2
• 页码：323-330
• 全文大小：587 KB
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• 作者单位：Wencheng Wang (1)
  Xiaoqing Li (2)
  Xiaohua Yu (2)
  Lijun Yan (1)
  Bingxin Lei (1)
  Pan Li (1)
  Changxing Chen (1)
  Wei Sun (1)
  
  1. College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, 571158, China
  2. College of Acumox and Tuina, Shangdong University of Traditional Chinese Medicine, Jinan, 250355, China
  
• 刊物主题：Analytical Chemistry; Inorganic Chemistry; Physical Chemistry; Biochemistry, general; Organic Chemistry;
• 出版者：Springer Berlin Heidelberg
• ISSN：1735-2428

文摘

In this paper, an electrodeposited zirconia (ZrO₂) nanoparticle and graphene (GR) nanosheet-modified carbon ionic liquid electrode (CILE) was fabricated to get a modified electrode that denoted as ZrO₂/GR/CILE, which was further used for the immobilization of myoglobin (Mb). The performances of ZrO₂/GR/CILE were checked by scanning electron microscopy and electrochemical methods, and the results indicated the formation of nanocomposite on the electrode surface with increased surface area. Direct electrochemistry of Mb was realized on the modified electrode with a pair of well-defined quasi-reversible redox peaks appeared, which was ascribed to the typical electrochemical behaviors of Mb Fe(III)/Fe(II) redox couples. Therefore, the presence of ZrO₂/GR on the electrode could provide a specific interface for accelerating the electron transfer of Mb with the underlying electrode. Electrochemical behaviors of Mb were carefully investigated with the electrochemical parameters calculated. Under the selected conditions, the Mb-modified electrode exhibited excellent electrocatalytic activity to the reduction of trichloroacetic acid in the concentration range from 0.4 to 29.0 mmol L−1 with a detection limit of 0.13 mmol L−1 (3σ). Keywords Graphene Zirconia nanoparticle Myoglobin Direct electrochemistry Electrocatalysis