Hydrogen Production and Storage: Analysing Integration of Photoelectrolysis, Electron Harvesting Lignocellulose, and Atmospheric Carbon Dioxide-Fixing Biosynthesis

Green hydrogen from photocatalytic water-splitting and lignocellulosic reforming is a significant proposition for renewable energy storage in global net-zero policies strategies. Although have been investigated, their integration novel. Furthermore, biosynthesis can store the evolved fix atmospheric carbon dioxide biocathode chamber. The chamber coupled to combined lignocellulose oxidation an anode This integrated system of mimics (bio)electrosynthesis system. A visible solar radiation-driven novel hybrid comprising water-splitting, oxidation, CO2 fixation is, thus, investigated. It must be noted that there no technology reducing concentration. Thus, our intensified enables sustainable economy direct capture air confront climate change impact. considered CdS nanocomposites give low absorption onset (200 nm), high absorbance range (200–800 narrow bandgap (1.58–2.4 V). Ralstonia eutropha H16 interfaced with anode. undergoes autotrophic metabolism fixing poly(3-hydroxybutyrate) biosynthesis. As readily stored, electron–hole pair separated, increasing evolution efficiency. are many experimental studies, this study first time sets maximum theoretical efficiency target mechanistic deductions practical insights. Compared physical/physicochemical solvent recovery CO2, photosynthetic 51%. solar-to-hydrogen generation 33%. Lignocelluloses participate by (1–4)-glycosidic bond decomposition, releasing accessible sugar monomers or monosaccharides forming Cd–O–R CdS/CdOx nanocomposite surface used as photocatalyst/semiconductor, leading CO32− oxidised carboxylic acid products. Lignocellulose dosing oxidising agent increase extent water-splitting. analyses affirm criticality evolution. critical conditions success alcohol neutralising agent’s strength, selective (ligno)cellulose dosing, broadening nanostructure enhancing visible-light absorbance, utilisation