title: Electrochemical study of brucine on an electrode modified with magnetic carbon-coated nickel nanoparticles.
abstract: A novel type of glassy carbon electrode modified with magnetic carbon-coated nickel nanoparticles (C-Ni/GCE) was fabricated and the electrochemical properties of brucine were studied using it. The carbon-coated nickel nanoparticles showed excellent electrocatalytic activity for the redox of brucine and an enhanced electron transfer rate. The electrochemical behavior of brucine on the C-Ni/GCE was explored by cyclic voltammetry (CV), and a redox mechanism for brucine was proposed. A series of electrochemical parameters were calculated for brucine by CV and controlled-potential electrolysis. The C-Ni/GCE showed good sensitivity, selectivity and stability, and was applied to determine the concentration of brucine. The differential pulse voltammetry (DPV) response of the C-Ni/GCE showed that the catalytic current was linear with the concentration of brucine in the range of 4.7 x 10(-8) to 2.4 x 10(-4) mol l(-1), with a correlation coefficient of 0.998. The detection limit was 1.4 x 10(-8) mol l(-1).
authors.affiliation: Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, People's Republic of China. wangsf@hubu.edu.cn
authors.forename: Sheng-Fu
authors.initials: SF
authors.lastname: Wang
authors.forename: Fen
authors.initials: F
authors.lastname: Xie
authors.forename: Ruo-Fei
authors.initials: RF
authors.lastname: Hu