Study of nonenzymatic H₂O₂ sensor based on hollow palladium and Gold nanoparticles modified electrode

• Main Authors: GAN Siwen, QI Junfei, XU Qinghao, HUANG shansheng
• Format: Article
• Language: English
• Published: Academic Journals Center of Shanghai Normal University 2013-04-01
• Series: Journal of Shanghai Normal University (Natural Sciences)
• Subjects: hollow palladium; synergetic effect; chemically modified electrode; hydrogen peroxide
• Online Access: http://qktg.shnu.edu.cn/zrb/shsfqkszrb/ch/reader/create_pdf.aspx?file_no=201302009&year_id=2013&quarter_id=2&falg=1

A novel nonenzymatic amperometric sensor based on hollow palladium and gold nanoparticles for detection of hydrogen peroxide (H₂O₂) was developed.The modified electrode was prepared by electrodepositing gold nanoparticles (AuNPs) and then modifying the surface of the Au-glassy carbon electrode with hollow palladium.The electrochemical characteristics of the mochifed electrode (Pd/AuNPs/GC) were investigated by cyclic voltammetry.The results showed that Pd/AuNPs/GC displayed high electrocatalytic activity towards the reduction of H₂O₂ due to the good synergetic effect of hollow Pd and AuNPs on the reaction of H₂O₂.The responding currents of the Pd/AuNPs/GC increased linearly with the concentration of H₂O₂ in a wide range of 2-216 μmol/L (<i>R</i>=0.9993) with a detection limit down to 0.2 μmol/L (<i>S/N</i>=3).The sensor also exhibited good anti-interference ability to electroactive molecules,including uric acid,ascorbic acid,glucose,and ethanol.