Direct Electrochemistry and Catalytic Function on Oxygen Reduction Reaction of Electrodes Based on Two Kinds of Magnetic Nano-particles with Immobilized Laccase Molecules

Synthesized carboxymethylated Chitosan coupled magnetic Fe 3 O 4 nano-particles and phthaloyl Chitosan overlapped magnetic Fe 3 O 4 nano-particles, were used as enzyme matrices to prepare two prototypes of Laccase-based electrodes. Dependences of structural and operating parameters on characteristic...

Full description

Saved in:
Bibliographic Details
Published in:Journal of inorganic and organometallic polymers and materials 2017, Vol.27 (1), p.201-214
Main Authors: Yang, Yang, Zeng, Han, Huo, Wen Shan, Zhang, Yu He
Format: Article
Language:English
Subjects:
Catalysis
Chemical synthesis
Chemistry
Chemistry and Materials Science
Chitosan
Diffusion layers
Electrochemistry
Inorganic Chemistry
Iron oxides
Laccase
Nanoparticles
Organic Chemistry
Oxygen reduction reactions
Polymer Sciences
Substrates
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Synthesized carboxymethylated Chitosan coupled magnetic Fe 3 O 4 nano-particles and phthaloyl Chitosan overlapped magnetic Fe 3 O 4 nano-particles, were used as enzyme matrices to prepare two prototypes of Laccase-based electrodes. Dependences of structural and operating parameters on characteristics of spectrometry, aggregation status and catalysis for oxygen reduction reaction of surface anchored protein molecules, were investigated and compared by electrochemical means in combination with spectroscopy and transmission electron microscopy. Results from experiments revealed that the latter electrode displayed favorable catalytic effect in oxygen reduction reaction in the absence of mediator. Key factor in limiting the efficiency of catalysis was ascribed to the diffusion process of the substrate into the layer of nano-particles containing Laccase. While the former electrode only showed efficient catalytic effect in oxygen reduction reaction in the presence of electron mediator with rate determining step in mass-transferring of mediator.
ISSN:1574-1443
1574-1451
DOI:10.1007/s10904-016-0464-x