Synthesis of PdPt Nanotubes Using Biotemplate and Their Application in Detection of H2O2

Utilizing the well-defined topography and uniformly distributed arginine resides on tobacco mosaic virus (TMV) exterior surface, we demonstrated a combined strategy of the biotemplate- and bromide ion induced galvanic replacement method to synthesize one tubular dimension (1D) PdPt alloy. The 1D and tubular structure of TMV/Pd70Pt30NT resulted in the improvement of electrochemically active specific surface area (ECSA) and conductivity. These advantages and PdPt bimetallic electronic effects synergistically led to high electrochemical catalytic activity of TMV/Pd70Pt30NT toward H2O2. The modified screen-printed electrode modified by TMV/Pd70Pt30NT (SPE/TMV/Pd70Pt30NT) had high sensitivity (493 A/(cm(2) center dot mol) ), which was higher than the SPE modified by Pd nanotube (TMV/PdNT ) and commercial Pt/C. Additionally, the electrodes have wide linear detection range of 8. 8 x10 (7)-1. 0 x10(-3) mol/L for detection of H2O2, with low detection limit of 2. 0 x 10(-7) mol/L(S/N=3).