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• W2032697550 endingPage "1421" @default.
• W2032697550 startingPage "1414" @default.
• W2032697550 abstract "The direct electrochemistry of catalase (CAT) at didodecyldimethylammonium bromide (DDAB) present on nafion dispersed multiwalled carbon nanotubes (MWCNTs-NF) modified glassy carbon electrode (GCE) has been reported. The presence of DDAB in MWCNTs-NF-CAT film enhances the surface coverage concentration of CAT (Fe(III/II)) to 48%. Similarly, in presence of DDAB, there is a 57% enhancement in electron transfer rate (ks) with 66% increase in CAT stability. (Fe(III/II)) redox couple exhibits linear dependence with the pH variation (-51 mV pH(-1)). The UV-vis absorption spectroscopy study reveals the entrapped CAT in DDAB film retains its native structure at MWCNTs-NF modified electrodes. Similarly, electrochemical impedance spectroscopy results confirm the co-existence of CAT and DDAB in the modified film. Further, scanning electron microscopy results reveal the structural morphological difference between various components in MWCNTs-NF-(DDAB/CAT) film. The cyclic voltammetry (CV) and amperometry (i-t curve) have been used for the measurement of electroanalytical properties of H2O2 by means of various film modified GCEs. The sensitivity values of MWCNTs-NF-(DDAB/CAT) film for H2O2 using CV (35.62 microA mM(-1)cm2) are higher than the values which are obtained for MWCNTs-NF-CAT film (2.74 mmicroA mM(-1)cm2). Similarly, the sensitivity values using i-t curve are 101.74 microA mM(-1)cm2 for MWCNTs-NF-(DDAB/CAT) and 74.69 microA mM(-1)cm2 for MWCNTs-NF-CAT film. Finally, the diffusion coefficient of H2O2 at MWCNTs-NF-(DDAB/CAT) film (3.4 x 10(-10) cm2 s(-1)) has been calculated using rotating disc electrode studies." @default.
• W2032697550 created "2016-06-24" @default.
• W2032697550 creator A5002027079 @default.
• W2032697550 creator A5008715301 @default.
• W2032697550 creator A5052535641 @default.
• W2032697550 date "2009-06-01" @default.
• W2032697550 modified "2023-09-27" @default.
• W2032697550 title "Direct electrochemistry of catalase at multiwalled carbon nanotubes-nafion in presence of needle shaped DDAB for H2O2 sensor" @default.
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• W2032697550 doi "https://doi.org/10.1016/j.talanta.2009.02.033" @default.
• W2032697550 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19362210" @default.
• W2032697550 hasPublicationYear "2009" @default.
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