Significantly Accelerated Direct Electron‐Transfer Kinetics of Hemoglobin in a C 60 ‐MWCNT Nanocomposite Film | Zendy

Zhang Hua | Zendy; Fan Louzhen | Zendy; Yang Shihe | Zendy

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Significantly Accelerated Direct Electron‐Transfer Kinetics of Hemoglobin in a C 60 ‐MWCNT Nanocomposite Film

Author(s) -

Zhang Hua,

Fan Louzhen,

Yang Shihe

Publication year - 2006

Publication title -

chemistry – a european journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.687

H-Index - 242

eISSN - 1521-3765

pISSN - 0947-6539

DOI - 10.1002/chem.200600055

Subject(s) - nanocomposite , kinetics , carbon nanotube , electron transfer , materials science , electrochemistry , chemical engineering , reaction rate constant , hemoglobin , nanotechnology , electron , electrode , chemistry , photochemistry , organic chemistry , physics , quantum mechanics , engineering

The direct electrochemistry of hemoglobin (Hb) was studied in a novel all‐carbon nanocomposite film of C 60 ‐MWCNT (MWCNT=multiple‐walled carbon nanotube) and compared with that in bare MWCNT film. The heterogeneous electron‐transfer rate constant k s of Hb/C 60 ‐MWCNT was determined to be 0.39 s −1 , which is more than one order of magnitude greater than that of Hb/MWCNT (0.03 s −1 ). The significantly accelerated electron‐transfer kinetics are attributed to the mediator role played by C 60 , which is finely dispersed on the MWCNT surfaces. The excellent stability of Hb/C 60 ‐MWCNT was established and its potential application towards the electrocatalytic reduction of O 2 was demonstrated.

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