Fig. 5

a ln(I∙T^0.5) and T⁻¹ curve for thick fully-grown biofilm grown at 314 K; b logarithmic amount of redox cofactors contributing to the steady-state current generation as temperature changes during fully grown biofilm by assuming the activation energy is 0.132 eV based on Fig. 4b; as temperature increases, a larger amount of redox cofactors are responsible for the catalytic activity of Geobacter sulfurreducens, suggesting that the catalytic activity of Geobacter sulfurreducens is temperature dependent and is favored by higher temperature