NDLI: PdCu alloy nanoclusters: generation and activity tuning for electrocatalytic oxidation of nitrite

Content Provider	Springer Nature Link
Author	Zhu, Xiaohong Kang, Guangfeng Lin, Xiangqin
Copyright Year	2007
Abstract	The process control of electrodeposition of nanoparticles by cyclic voltammetry (CV) is important with respect to the preparation of highly active catalysts. We have simultaneously deposited novel nanoclusters of PdCu alloys on the surface of glassy carbon electrodes (GCEs) from a solution. SEM, XPS, XRD and electrochemical techniques were used for characterizing the nanocomposite and the modified electrode (PdCu/GCE). We found that the PdCu alloys form liana-like fractal 2D-nanoclusters on the base and spherical 3D-nanoclusters on the top, and these clusters consisted of 9.9 nm average sized nanoparticles. The 2D-clusters have strong ability to reduce the overpotentials of nitrite oxidation but have small influence on the current response. Inversely, the 3D-clusters have weak ability to influence the overpotentials but strong ability to influence the current response. It is found that the cycle number is important to the catalytic activity of the generated nanoclusters and 25 cycle number was the optimal for obtaining most negative peak potential (0.77 V vs. SCE) with highest CV peak current (0.53 A/M · cm2) and DPV peak current for nitrite oxidation. This PdCu/GCE can be used as a sensitive and stable nitrite sensor with wide linear range. Mechanisms of the deposition and catalytic activity of the nanoclusters are discussed.
Starting Page	141
Ending Page	148
Page Count	8
File Format	PDF
ISSN	00263672
Journal	Microchimica Acta
Volume Number	159
Issue Number	1-2
e-ISSN	14365073
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-04-02
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Analytical Chemistry Inorganic Chemistry Physical Chemistry Characterization and Evaluation of Materials Monitoring/Environmental Analysis/Environmental Ecotoxicology
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

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