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Facile synthesis of a porous network-like silver film for electrocatalytic detection of nitrate

Authors
  • Zhou, Dan-Ling1
  • Zhang, Qian-Li2
  • Lv, Zhang-Ying1
  • Chen, Wan-Yi1
  • Liu, Xiang-Feng1
  • Lu, Ya-Hui3
  • Wang, Ai-Jun1
  • Feng, Jiu-Ju1
  • 1 Zhejiang Normal University, College of Geography and Environmental Science, College of Chemistry and Life Science, Jinhua, 321004, China , Jinhua (China)
  • 2 Suzhou University of Science and Technology, School of Chemistry and Biological Engineering, Suzhou, 215009, China , Suzhou (China)
  • 3 School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, China , Xinxiang (China)
Type
Published Article
Journal
Microchimica Acta
Publisher
Springer-Verlag
Publication Date
Oct 04, 2013
Volume
180
Issue
15-16
Pages
1495–1500
Identifiers
DOI: 10.1007/s00604-013-1089-1
Source
Springer Nature
Keywords
License
Yellow

Abstract

We have developed a method for in-situ construction of a porous network-like silver film on the surface of a glassy carbon electrode (GCE). It is based on a galvanic replacement reaction where a layer of copper nanoparticles is first electrodeposited as a sacrificial template. The silver film formed possesses a porous network-like structure and consists of an assembly of numerous nanoparticles with an average size of 200 nm. The electrode displays excellent electrocatalytic activity, good stability, and fast response (within 2 s) toward the reduction of nitrate at a working potential of −0.9 V. The catalytic currents linearly increase with the nitrate concentrations in the range of 0.08–6.52 mM, with a detection limit of 3.5 μM (S/N = 3) and a repeatability of 3.4 % (n = 5). FigureA facile method was developed for in situ construction of a porous network-like Ag film on a glassy carbon electrode by a galvanic replacement reaction, where a layer of Cu nanoparticles previously electrodeposited as a sacrificial template. Thus-formed Ag film displays excellent electrocatalytic activity, good stability, and fast response (within 2 s) toward nitrate reduction.

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