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Electrochemical Reconstitution of Biomolecules for Applications as Electrocatalysts for the Bionanofuel CellPlatinum-cored ferritins were synthesized as electrocatalysts by electrochemical biomineralization of immobilized apoferritin with platinum. The platinum cored ferritin was fabricated by exposing the immobilized apoferritin to platinum ions at a reduction potential. On the platinum-cored ferritin, oxygen is reduced to water with four protons and four electrons generated from the anode. The ferritin acts as a nano-scale template, a biocompatible cage, and a separator between the nanoparticles. This results in a smaller catalyst loading of the electrodes for fuel cells or other electrochemical devices. In addition, the catalytic activity of the ferritin-stabilized platinum nanoparticles is enhanced by the large surface area and particle size phenomena. The work presented herein details the immobilization of ferritin with various surface modifications, the electrochemical biomineralization of ferritin with different inorganic cores, and the fabrication of self-assembled 2-D arrays with thiolated ferritin.
Document ID
20040050929
Acquisition Source
Langley Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Kim, Jae-Woo
(Science and Technology Corp. Hampton, VA, United States)
Choi, Sang H.
(NASA Langley Research Center Hampton, VA, United States)
Lillehei, Peter T.
(NASA Langley Research Center Hampton, VA, United States)
King, Glen C.
(NASA Langley Research Center Hampton, VA, United States)
Watt, Gerald D.
(Brigham Young Univ. Provo, UT, United States)
Chu, Sang-Hyon
(National Inst. of Aerospace Research Hampton, VA, United States)
Park, Yeonjoon
(Science and Technology Corp. Hampton, VA, United States)
Thibeault, Sheila
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 21, 2013
Publication Date
March 23, 2004
Subject Category
Inorganic, Organic And Physical Chemistry
Report/Patent Number
LAR-16846-1
LAR-16758-1
Meeting Information
Meeting: SPIE 11th Annual International Symposium on Smart Structures and Materials
Location: San Diego, CA
Country: United States
Start Date: March 14, 2004
End Date: March 18, 2004
Sponsors: International Society for Optical Engineering
Distribution Limits
Public
Copyright
Public Use Permitted.
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