Kyoto University · Engineering
Professor Yuki Kitazumi's research lab specializes in bioelectrochemistry, focusing on direct electron transfer (DET)-type bioelectrocatalysis using redox enzymes and nanostructured electrodes. The lab investigates the interplay between enzyme structure, electrode nanoarchitecture, and electron transfer kinetics, with applications in biosensors and bioenergy conversion. A key research direction involves protein engineering of enzymes to enhance DET efficiency and enable novel catalytic functions, such as switching from oxidation to reduction under specific conditions. The lab also explores interfacial electrochemistry at liquid-liquid interfaces to understand the fundamental behavior of surface-active ions and their interactions with electric fields.
Figures are computed from collected data and may differ slightly.
Direct electron transfer (DET)-type bioelectrocatalysis, which couples the electrode reactions and catalytic functions of redox enzymes without any redox mediator, is one of the most intriguing subjects that has been studied over the past few decades in the field of bioelectrochemistry. In order to realize the DET-type bioelectrocatalysis and improve the performance, nanostructures of the electrode surface have to be carefully tuned for each enzyme. In addition, enzymes can also be tuned by the
The adsorption of decylsulfate (DeSO4(-)) and decylammonium (DeNH(3+)) at the 1,2-dichloroethane (DCE)|water(W) interface has been examined as a function of the phase-boundary potential by simultaneous recording of electrocapillary curves and voltammograms. The standard Gibbs energies for the adsorption of DeSO(4)(-) and DeNH(3)(+) at the DCE|W interface from the W phase depend linearly on the phase-boundary potential, having the slopes of 9.1 and-9.8 kJ mol-1 V-1, respectively. These values sug
The bioelectrocatalytic properties of membrane-bound aldehyde dehydrogenase (AlDH) from Gluconobacter oxydans NBRC12528 were evaluated. AlDH exhibited direct electron transfer (DET)-type bioelectrocatalytic activity for acetaldehyde oxidation at several kinds of electrodes. The kinetic and thermodynamic parameters for bioelectrocatalytic acetaldehyde oxidation were estimated based on the partially random orientation model. Moreover, at the multi-walled carbon nanotube-modified electrode, the coo
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