A new paper by Dr. Hanzi Li is now available, describing a new method for preparation of NADH oxidizing electrodes for biosensor, bioreactor, and biofuel cell applications.
Azine catalyst layers deposited either by electroadsorption or by adsorption on electroactivated surfaces are both conformal and active toward NADH oxidation.
Published in ACS Applied Materials & Interfaces, this paper resulted from an NSF-sponsored collaboration with Dr. Mark Worden, and his recent graduate, Dr. Rui Li. The paper describes an approach for preparing carbon surfaces for immobilization of azines, which have been shown to be very active toward NADH electrooxidation. Previous azine electrodes were prepared by electropolymerization of the azine on carbon surfaces. This process exposed the azine to extreme potentials, and the polymerization process has the potential to change the electronic structure of the catalyst. In contrast, electroactivation of the carbon allows the azines to be deposited without polymerization, and maintains the high loading, conformal coating, and high activity of the electropolymerized electrodes. In fact activity is improved for adsorbed azines on most electroactivated carbons.
Reference: Hanzi Li, Rui Li, R. Mark Worden and Scott Calabrese Barton, “Facilitation of High-Rate NADH Electrocatalysis Using Electrochemically Activated Carbon Materials.”, ACS Appl. Mater. Interfaces, (2014). doi:10.1021/am500087a.
