Electrocatalytic Reduction of Hydrogen Peroxide by Nanostructured Bimetallic Films of Metalloporphyrins

We report the sequential electrochemical deposition of bimetallic films of porphyrins onto gold nanoparticles, previously deposited by SAM on gold surface. SEM analysis of EAu/polyFeCuPP and EAu/cys/AuNp/polyFeCuPP showed a heterogeneous distribution of material aggregates in the former (ca. 0.1–1 μm), whereas the nanocomposite film exhibits a highly microporous structure in the micrometer diameter range. The sensitivity for H2O2 detection increased four times (609±6 mA M−1 cm−2 vs. 157±3 mA M−1 cm−2) with a linear relationship in the range of 1×10−5–2×10−3 M. The application of the particulate material to the first-generation biosensor of glucose is described.

[1]  V. Flexer,et al.  Wired-enzyme core-shell Au nanoparticle biosensor. , 2008, Journal of the American Chemical Society.

[2]  V. Orto,et al.  Supported bimetallic polymers of porphyrins as new heterogeneous catalyst , 2008 .

[3]  P. Stopka,et al.  Decolorization of synthetic dyes by hydrogen peroxide with heterogeneous catalysis by mixed iron oxides , 2006 .

[4]  M. El-Sayed,et al.  Chemistry and properties of nanocrystals of different shapes. , 2005, Chemical reviews.

[5]  Rakesh K. Sharma,et al.  Size-dependent catalytic behavior of platinum nanoparticles on the hexacyanoferrate(III)/thiosulfate redox reaction. , 2003, Journal of colloid and interface science.

[6]  P. Aranda,et al.  A new silver-ion selective sensor based on a polythiacrown-ether entrapped by sol-gel , 2002 .

[7]  M. Biesaga,et al.  Porphyrins in analytical chemistry. A review. , 2000, Talanta.

[8]  R. Seeber,et al.  Electropolymerization of Tetrakis(o‐aminophenyl)porphyrin and Relevant Transition Metal Complexes from Aqueous Solution. The Resulting Modified Electrodes as Potentiometric Sensors , 1999 .

[9]  B. Feringa,et al.  Bimetallic catalysis by late transition metal complexes , 1998 .

[10]  T. Traylor,et al.  Polyhaloporphyrins: Unusual Ligands for Metals and Metal-Catalyzed Oxidations , 1997 .

[11]  M. Grasselli,et al.  A novel polymeric catalyst from hemin for oxidation reactions , 1996 .

[12]  F. Bedioui.  Zeolite-encapsulated and clay-intercalated metal porphyrin, phthalocyanine and Schiff-base complexes as models for biomimetic oxidation catalysts: an overview , 1995 .

[13]  M. Wikström,et al.  The dioxygen cycle. Spectral, kinetic, and thermodynamic characteristics of ferryl and peroxy intermediates observed by reversal of the cytochrome oxidase reaction. , 1992, The Journal of biological chemistry.

[14]  T. Spiro,et al.  PORPHYRIN ELECTRODE FILMS PREPARED BY ELECTROOXIDATION OF METALLOPROTOPORPHYRINS , 1983 .

[15]  F. Kampas,et al.  On the preparation of metalloporphyrins , 1970 .