%A Jing BAI, Bo ZHANG, Jinhua LI, Baoxue ZHOU %T Photoelectrocatalytic generation of H2 and S from toxic H2S by using a novel BiOI/WO3 nanoflake array photoanode %0 Journal Article %D 2021 %J Front. Energy %J Frontiers in Energy %@ 2095-1701 %R 10.1007/s11708-021-0775-7 %P 744-751 %V 15 %N 3 %U {https://journal.hep.com.cn/fie/EN/10.1007/s11708-021-0775-7 %8 2021-09-15 %X

In this paper, a photoelectrocatalytic (PEC) recovery of toxic H2S into H2 and S system was proposed using a novel bismuth oxyiodide (BiOI)/ tungsten trioxide (WO3) nano-flake arrays (NFA) photoanode. The BiOI/WO3 NFA with a vertically aligned nanostructure were uniformly prepared on the conductive substrate via transformation of tungstate following an impregnating hydroxylation of BiI3. Compared to pure WO3 NFA, the BiOI/WO3 NFA promotes a significant increase of photocurrent by 200%. Owing to the excellent stability and photoactivity of the BiOI/WO3 NFA photoanode and I/I 3 catalytic system, the PEC system toward splitting of H2S totally converted S2– into S without any polysulfide ( Sx n) under solar-light irradiation. Moreover, H2 was simultaneously generated at a rate of about 0.867 mL/(h·cm). The proposed PEC H2S splitting system provides an efficient and sustainable route to recover H2 and S.