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High‐Performance Hydrazine Sensor Based on Graphene Nano Platelets Supported Metal Nanoparticles
Author(s) -
Liu Yi,
Qiu Zhipeng,
Wan Qijin,
Wang Zhaohao,
Wu Kangbing,
Yang Nianjun
Publication year - 2016
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201500531
Subject(s) - hydrazine (antidepressant) , chronoamperometry , graphene , cyclic voltammetry , materials science , nanoparticle , palladium , nanomaterials , detection limit , chemical engineering , coating , reducing agent , metal , electrochemistry , inorganic chemistry , nuclear chemistry , nanotechnology , catalysis , chemistry , metallurgy , electrode , organic chemistry , chromatography , engineering
Surface coating of graphene nano platelets with gold‐palladium nanoparticles (AuPd NPs) was conducted via potentiostatic electrodeposition from a mixture of HAuCl 4 and H 2 PdCl 4 . AuPd NPs were characterized using SEM, TEM, XRD and energy dispersive X‐ray spectroscopy. The AuPd NPs with the diameter of about 30–60 nm were alloyed and well‐dispersed on the graphene surface. Electrochemistry of hydrazine on AuPd NPs was investigated using cyclic voltammetry and chronoamperometry, indicating high electrocatalytic ability of AuPd NPs towards oxidation of hydrazine. Under the optimized conditions, the oxidation current was linear to the hydrazine concentration in the range of 0.02–166.6 µM. The calculated detection limit was 5 nM (S/N=3).