Applied Biochemistry and Biotechnology, Vol.84-86, 409-418, 2000
Fabrication of an electrode-viologen-hydrogenase heterogeneous system and the electrochemical hydrogen evolution
An indium tin oxide (ITO) electrode was chemically modified by one layer of viologen (VIO) derivative, which possessed a persistent and reproducible electrochemical response. A monolayer of a thermal stable hydrogenase from Thiocapsa roseopersicina was stabilized on a synthesized poly-L-lysine subphase surface and transferred onto the electrode for fabrication of an ITO-VIO-hydrogenase heterogeneous system. Electrochemical properties of both the ITO-VIO monolayer and the heterogeneous ITO-VIO-hydrogenase system have been investigated. Hydrogen evolution could be measured by potentiostating the VIO-hydrogenase-covered ITO electrode to "electroplate" [(VIO')(n)](surf), and a large increase in hydrogen evolution was observed the possible electron transfer process.
Keywords:indium tin oxide-viologen monolayer;electrochemistry;hydrogenase;Langmuir-Blodgett film;hydrogen evolution