A Green Desulfurization Technique: Utilization of Flue Gas SO(2) to Produce H(2) via a Photoelectrochemical Process Based on Mo-Doped BiVO(4)

A green photoelectrochemical (PEC) process with simultaneous SO(2) removal and H(2) production has attracted an increasing attention. The proposed process uses flue gas SO(2) to improve H(2) production. The improvement of the efficiency of this process is necessary before it can become industrial viable. Herein, we reported a Mo modified BiVO(4) photocatalysts for a simultaneous SO(2) removal and H(2) production. And the PEC performance could be significantly improved with doping and flue gas removal. The evolution rate of H(2) and removal of SO(2) could be enhanced by almost three times after Mo doping as compared with pristine BiVO(4). The enhanced H(2) production and SO(2) removal is attributed to the improved bulk charge carrier transportation after Mo doping, and greatly enhanced oxidation reaction kinetics on the photoanode due to the formation of [Formula: see text] after SO(2) absorption by the electrolyte. Due to the utilization of SO(2) to improve the production of H(2), the proposed PEC process may become a profitable desulfurization technique.