NDLI: A glassy carbon electrode modified with nanoporous PdFe alloy for highly sensitive continuous determination of nitrite

Content Provider	Springer Nature Link
Author	Wang, Jinping Zhou, Haiyu Fan, Dawei Zhao, Dianyun Xu, Caixia
Copyright Year	2014
Abstract	Nanoporous palladium-iron alloy (np-PdFe) was fabricated by dealloying. It possesses a three-dimensional nanospongy architecture with a typical dimension of ~ 5 nm and displays a high catalytic activity towards oxidation of nitrite in phosphate buffer of pH 7.0 at a working voltage of 1.2 V (vs. the reversible hydrogen electrode). Compared to np-Pd and a commercial Pd/C catalyst, the np-PdFe alloy exhibits superior detection capability such as a wide linear range (that extends from 0.5 to 25.5 mM), fast amperometric response (within 2 s), and a low detection limit (0.8 μM). Long-term tests demonstrate that the np-PdFe alloy has improved reproducibility and durability, with almost no activity loss upon continuous nitrite detection for two weeks. The method was applied to determine nitrite in sausage and the results are in good agreement with those of the Griess method. Graphical Abstract Nanoporous PdFe alloy, characterized by open three-dimensional continuous nanospongy architecture, was easily fabricated by selectively dealloying PdFeAl source alloys, which exhibit greatly sensing performance, structure stability, and analytical utility towards nitrite compared with Pd/C and np-Pd catalysts.
Starting Page	1055
Ending Page	1061
Page Count	7
File Format	PDF
ISSN	00263672
Journal	Microchimica Acta
Volume Number	182
Issue Number	5-6
e-ISSN	14365073
Language	English
Publisher	Springer Vienna
Publisher Date	2014-12-02
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Palladium Nitrite Nanoporous materials Dealloying Electrochemical detection Nanochemistry Nanotechnology Characterization and Evaluation of Materials Analytical Chemistry Microengineering
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

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