From: Electrical energy storage with engineered biological systems
Microorganism | Reactions | Electron flowa | Estimated applied electrode potential (V. vs. SHE) | Assumed acceptorb | Estimated electrode overpotential (V)c | Biofilm thickness (μm) or cell density (OD unit) | Cathode material | Electron transport mechanism | Reference |
---|---|---|---|---|---|---|---|---|---|
Geobactor sulfurreducens strain DL-1 | Fumarate to succinate | Cathodic | -0.3 | Mtr EET Complex | ≈ 0.2 | 35 | Graphite | EET | Ueki et al. [63] |
Geobactor sulfurreducens | Fumarate to succinate | Cathodic | -0.3 | Mtr EET Complex | ≈ 0.2 | 12 | Graphite | EET | Strycharz-Glaven et al. [139] |
Geobacter sulfurreducens | Acetate to electricity | Anodic | 0.3 | Mtr EET Complex | ≈ 0.4 | 40 | Graphite | EET | Reguera et al. [140] |
Sporomusa ovata | CO2 to acetate | Cathodic | -0.4 | Mtr EET Complex | ≈ 0.3 | 12 | Graphite | EET | Nevin et al. [141] |
Mariprofundus ferrooxydans | Fe3+/Fe2+ | Cathodic | -0.076 | Mtr EET Complex | - | Initial OD = 0.01 | Graphite | EET | Summers et al. [142] |
Shewanella oneidensis MR-1 | Lactate, Cr5+/Cr6+ | Anodic | 0.3 | Mtr EET Complex | - | Initial OD = 0.3 | Graphite | EET | Xafenias et al. [143] |
Acetobacterium spp + Rhodobacteraceae | CO2 to acetate | Cathodic | -0.59 | H2 | ≈ 0.17 | 0.5 | Graphite | H2 | Marshall et al. [144] |
Ralstonia eutropha | CO2 to isobutanol | Cathodic | -1.4 | H2 and Formate | ≈ 1 | Initial OD = 0.8-1 | Indium foil | H2 and Formate | Li et al. [43] |
Ralstonia eutropha | CO2 to biomass and PHB | Cathodic | -0.6 | H2 | ≈ 0.2 | Initial OD = 0.2 | Co-P alloy | H2 | Liu et al. [45] |