Local analysis of oxygen reduction catalysis by scanning vibrating electrode technique : a new approach to the study of biocorrosion

摘要: The scanning vibrating electrode technique (SVET) was employed to investigate oxygen reduction catalysis by the presence of enzyme in an aerobic medium. Heme protoporphyrin (hemin) chosen as a model enzymes that are able catalyze reduction. A strict experimental protocol defined for preparing graphite surface deposition hemin with simple configuration mimicking on samples. same adapted stainless steel electrode. Different geometric arrangements were investigated SVET approach local conditions. results demonstrated deposited led increase cathodic current, which indicated catalytic effect. Based analysis, it caused appearance galvanic cells material surface. proved locate active centres and therefore foresee contribution creation cells, thus leading localized corrosion. application study interaction between biological molecules provides new visualizing understanding microbially influenced corrosion (MIC)