title: Facile fabrication of nanoporous PdFe alloy for nonenzymatic electrochemical sensing of hydrogen peroxide and glucose.
abstract: 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 μM. This nanoporous structure also can sensitively detect glucose over a wide concentration range (1-32 mM) with a low detection limit of 1.6 μM 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.
authors.affiliation: Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
authors.forename: Jinping
authors.initials: J
authors.lastname: Wang
authors.affiliation: School of Basic Medical Sciences, Shandong University of Traditional Chinese Medicine, Jinan 250355, China.
authors.forename: Zhihong
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
authors.forename: Dianyun
authors.initials: D
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China. Electronic address: chm_xucx@ujn.edu.cn.
authors.forename: Caixia
authors.initials: C
authors.lastname: Xu
mesh_terms: D000497:Alloys / Q000737:chemistry*; D055664:Electrochemical Techniques; D005947:Glucose / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D058085:Iron Compounds / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D058608:Nanopores; D010165:Palladium / Q000737:chemistry*
chemical_list: D000497:Alloys; D058085:Iron Compounds; D010165:Palladium; D006861:Hydrogen Peroxide; D007501:Iron; D005947:Glucose
keywords: Dealloying; Glucose; Hydrogen peroxide; Nanoporous; Palladium; Sensor