Biofilms formed from a pure strain of Desulfovibrio desulfuricans 27774 on stainless steel and graphite polarised surfaces were studied. The polarisation conditions applied were -0.4 V vs. SCE for different times. A cathodic current related with the biofilms growth was observed with a maximum intensity of -270 mA m-2 that remained stable for several days using graphite electrodes. These sulphate reducing bacteria biofilms present electrocatalytic activity towards hydrogen and oxygen reduction reactions. Electrode polarisation has a selective effect on the catalytic activity. The biofilms were also observed by scanning electronic microscopy revealing the formation of homogeneous films on the surfaces.
|Number of pages||6|
|Publication status||Published - 1 Dec 2008|
|Event||International conference on biocorrosion of materials, BIOCORYS 2007 - Paris, Portugal|
Duration: 14 Jun 2007 → 17 Jun 2007
- Sulphate reducing bacteria