Design and modelling of a photo-electrochemical transduction system based on solubilized photosynthetic reaction centres

Time series analysis and long short-term memory (LSTM) network prediction of BPV current density

“…Previous models of the photocurrent in BPVs have been developed from first-principles using equations describing the relevant physical, biological, and electrochemical phenomena occurring within the devices. They have mainly focused on systems using sub-cellular photosynthetic units such as reaction centres, photosystem I and photosystem II extracted from plants, algae and bacteria [12][13][14][15][16] . Modelling work on photocurrents in wholecell BPVs is limited; only one study modelling the photocurrent in an electrochemical set up using whole cells was found in the literature 17 .…”

A Biological-Based Photovoltaic Electrochemical Cell: Modelling the Impedance Spectra

“…On the other side, there is a growing interest in mimicking sunlight energy conversion occurring in the natural photosynthetic process, such as in the Grätzel cell [1]. More recently, photoactive proteins extracted from plants, bacteria, and archaea [2][3][4][5] have been tested with the aim of producing biological-based photoelectrochemical cells (bPECs). In particular, much interest is devoted to the reaction center (RC) isolated from the purple photosynthetic bacterium Rhodobacter sphaeroides, thanks to its simple extraction and purification procedure, stability outside its natural environment, and large possibility of genetic manipulation for mutant construction [6].…”

“…Although the processes that the protein activates in vivo are known in sufficient detail, the features of the operating mechanisms in the electrochemical cell have to be clarified. In fact, many factors dramatically influence the behavior of the device, depending on the different kind of assembly, as for example, the protein location, dissolved in the bulk [5] or immobilized on the working electrode (WE) [8][9][10]; the type of employed mediators, endogenous or exogenous [11]; the applied bias [12]; and so on.…”

A kinetic model for redox-active film based biophotoelectrodes

“…This ratio can be more clearly demonstrated aer multiplication of the numerator and denominator by Y tot and rearrangement; the result is shown in eqn (12). In this equation, the units of the numerator and the denominator are mol cm À3 s À1 ; the numerator therefore represents the maximum possible rate of SC1 (when both reaction species are at their maximum possible concentrations), and the denominator represents the maximum molar diffusion rate of SC1 in a basis area of l 1 2 .…”

“…Several models have been previously developed for biophotoelectrochemical systems, which considered photosynthetic proteins [9][10][11][12] or whole photosynthetic cells immobilized on electrodes or in solution. 13,14 In these previous reports, electronic communication between the photosystems and the electrode were modelled based on freely diffusing electron mediators.…”