Photocatalytic hydrogen generation in the presence of ethanolamines over Pt/ZnIn2S4 under visible light irradiation

Hierarchical ZnIn2S4/MoSe2 Nanoarchitectures for Efficient Noble‐Metal‐Free Photocatalytic Hydrogen Evolution under Visible Light

“…[12,40] Thea bove XPS resultsc orroborate the successfuli ncorporation of ZnIn 2 S 4 andM oSe 2 into the hybrid system.F urthermore, according to the valence band (VB) XPS spectrum (Figure 5f), the VB positiono fZ nIn 2 S 4 is determined to be + 1.50 eV and combined with the earlier UV/Vis results, this infers as uitable conduction band (CB) edge position (À1.2 eV) for H 2 evolution. [8,9,[13][14][15][16] The photocatalytic H 2 activity of pristine ZnIn 2 S 4 in our current work can be attributed to the uniqueh ierarchical architectures assembled by ultrathin layers (Figure 2). As plotted in Figure 6a, pristine MoSe 2 evolves an egligible amount of H 2 .P ure ZnIn 2 S 4 features an extraordinary photocatalytic activity, giving aH 2 evolution rate of 1023 mmol g À1 h À1 ,w hich surpasses most of the previously reported pristineZ nIn 2 S 4 materials.…”

“…[1][2][3][4][5][6] Among the reporteds emiconductormetal-sulfide photocatalystsw ith visible-light responses, af ascinating ternary chalcogenide, namely ZnIn 2 S 4 ,h as spurred a thriving area of research with attractive features such as as uitable band gap, non-toxicity,h igh chemical stability,a nd excellent catalytic activity,w hich render ZnIn 2 S 4 ag ood alternative to the highly poisonous CdS for visible light photocatalytic H 2 production. [8,9,[13][14][15][16] In regard to the high cost and scarcity of noble metals,incorporating noble-metal-free cocatalysts into the ZnIn 2 S 4 system has become ah ot research topic in photocatalytic water splitting. [12] Generally, noble metals such as Pt have been used as effectivec ocatalysts to modifyp ristine ZnIn 2 S 4 for H 2 evolution.…”

“…[12] Generally, noble metals such as Pt have been used as effectivec ocatalysts to modifyp ristine ZnIn 2 S 4 for H 2 evolution. [8,9,[13][14][15][16] In regard to the high cost and scarcity of noble metals,incorporating noble-metal-free cocatalysts into the ZnIn 2 S 4 system has become ah ot research topic in photocatalytic water splitting. Recently,c arbon-based nanomaterials such as carbon quantum dots, [16] reduced graphene oxide (RGO), [17][18][19] carbon nanofibers, [20] and carbonn anotubes [21] have been demonstrated to be efficient cocatalysts in combination with ZnIn 2 S 4 for photocatalytic H 2 evolution.…”

Effects of inorganic electron donors in photocatalytic hydrogen production over Ru/(CuAg)0.15In0.3Zn1.4S2 under visible light irradiation

“…30 The photocatalytic efficiency with organic donors seems to be lower than that with inorganic electron donors. 17 For instance, S 2À and SO 3 2À in the photocatalytic reaction of (AgIn) x Zn 2(1Àx) S 2 significantly accelerated H 2 production rate (up to 3100 lmol g À1 h À1 ). 28 However, to the best of our knowledge, there have been few studies that systematically compared photocatalytic H 2 production with different inorganic electron donors.…”

“…,17 Thus, for most hydrogen-evolution systems, sacrificial agents are usually added as electron donors to JOURNAL OF RENEWABLE AND SUSTAINABLEENERGY 6, 033131 (2014) …”