Journal
ANALYTICA CHIMICA ACTA
Volume 832, Issue -, Pages 34-43Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2014.04.062
Keywords
Palladium; Nanoporous; Sensor; Glucose; Hydrogen peroxide; Dealloying
Categories
Funding
- National Science Foundation of China [51001053, 21271085]
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Nanoporous (NP) PdFe alloy is easily fabricated through one step mild dealloying of PdFeAl ternary source alloy in NaOH solution. Electron microscopy characterization demonstrates that selectively dissolving Al from PdFeAl alloy generates three-dimensional bicontinuous nanospongy architecture with the typical ligament size around 5 nm. Electrochemical measurements show that the NP-PdFe alloy exhibits the superior electrocatalytic activity and durability towards hydrogen peroxide (H2O2) detection compared with NP-Pd and commercial Pd/C catalysts. In addition, NP-PdFe performs high sensing performance towards H2O2 in a wide linear range from 0.5 to 6 mM with a low detection limit of 2.1 mu M. This nanoporous structure also can sensitively detect glucose over a wide concentration range (1-32 mM) with a low detection limit of 1.6 mu M and high resistance against chloride ions. Along with these attractive features, the as-made NP-PdFe alloy also has a good anti-interference towards ascorbic acid, uric acid, and dopamine. (C) 2014 Elsevier B.V. All rights reserved.
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