Chandra Sudeshna, Lokesh K S, Nicolai Anja, Lang Heinrich
Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Institut für Chemie, Lehrstuhl Anorganische Chemie, Strasse der Nationen 62, 09111 Chemnitz, Germany.
Anal Chim Acta. 2009 Jan 19;632(1):63-8. doi: 10.1016/j.aca.2008.10.062. Epub 2008 Nov 5.
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.
采用新合成的基于N,N-双琥珀酰胺的树枝状大分子作为稳定剂制备了铑金属纳米颗粒。铑纳米颗粒呈球形，粒径约为2纳米。将树枝状大分子包裹铑的纳米颗粒（Rh-DENs）固定在玻碳电极（GCE）上，并采用循环伏安法和计时电流法研究了其对过氧化氢还原的电催化活性。Rh-DENs修饰的GCE对过氧化氢还原反应表现出优异的电催化活性。在磷酸盐缓冲液（pH 7.0）中，修饰电极在-0.3 V（vs SCE）处的稳态阴极电流响应显示，对过氧化氢浓度在8至30 microM范围内呈线性响应，检测限和灵敏度分别为5 microM和0.03103x10(-6) A microM(-1)。
