期刊
BIOSENSORS & BIOELECTRONICS
卷 26, 期 5, 页码 1970-1974出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2010.08.049
关键词
Layered double hydroxides; Ni/Al-LDHs; Co/Al-LDHs; Hydrogen peroxide; Redox mechanisms
类别
资金
- National Natural Science Foundation of China [20775002]
- Program for Innovative Research Team in Anhui Normal University
Two different hydrogen peroxide sensors were constructed with Ni/Al and Co/Al layered double hydroxides (LDHs) modified glassy carbon electrodes (GCE). Ni (Co)/Al-LDHs were synthesized by electrochemical method and were characterized by scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The advantages and shortcoming of the two hydrogen peroxide sensors were described in detail. Compared to Co/Al-LDHs modified electrode, sensors fabricated by Ni/Al-LDHs showed quicker heterogeneous electron transfer rate constants (k(s)), lower detection and better reproducibility. But Co/Al-LDHs modified electrode held the advantages of wider linear range and higher sensitivity. Further more, the different catalytic redox mechanisms of hydrogen peroxide on the Ni/Al/GCE and Co/Al/GCE were firstly comparatively explored. (C) 2010 Elsevier B.V. All rights reserved.
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