title: Dendrimer-rhodium nanoparticle modified glassy carbon electrode for amperometric detection of hydrogen peroxide.
abstract: Metallic nanoparticles of rhodium were prepared by using the newly synthesized N,N-bis-succinamide-based dendrimer as stabilizers. The Rh nanoparticles were spherical shaped with a particle size of approximately 2 nm. The dendrimer Rh-encapsulated nanoparticles (Rh-DENs) were immobilized on glassy carbon electrode (GCE) and their electrocatalytic activity towards hydrogen peroxide reduction was investigated using cyclic voltammetry and chronoamperometry. The Rh-DENs modified GCE showed excellent electrocatalytic activity for hydrogen peroxide reduction reactions. The steady-state cathodic current response of the modified electrode at -0.3 V (vs SCE) in phosphate buffer (pH 7.0) showed a linear response to hydrogen peroxide concentration ranging from 8 to 30 microM with a detection limit and sensitivity of 5 microM and 0.03103x10(-6) A microM(-1), respectively.
authors.affiliation: Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Institut für Chemie, Lehrstuhl Anorganische Chemie, Strasse der Nationen 62, 09111 Chemnitz, Germany. sudeshna_cc@rediffmail.com
authors.forename: Sudeshna
authors.initials: S
authors.lastname: Chandra
authors.forename: K S
authors.initials: KS
authors.lastname: Lokesh
authors.forename: Anja
authors.initials: A
authors.lastname: Nicolai
authors.forename: Heinrich
authors.initials: H
authors.lastname: Lang