Mo-/O-deficient Bi2Mo3(S,O)12 oxysulfide for enhanced visible-light photocatalytic H2 evolution and pollutant reduction via in-situ generated protons: A case of material design in converting an oxidative Bi2Mo3O12 catalyst for the reduction

Sulfur Substitution and Defect Engineering in an Unfavored MnMoO4 Catalyst for Efficient Hydrogen Evolution under Visible Light

“…The peak splitting is related to the spin-orbital of Mo. The peaks located at 235.4 and 232.3 eV correspond to Mo 6+ 3d 3/2 and Mo 6+ 3d 5/2 , respectively, while the peaks located at 233.6 and 230.5 eV correspond to Mo 4+ 3d 3/2 and Mo 4+ 3d 5/2 . , Compared with the XPS of MnMoO 4 to show the Mo 4+ peaks at 234.0 and 230.9 eV, we confirm the presence of Mo 4+ in MnMoOS. The Mo 4+ /(Mo 6+ + Mo 4+ ) ratios in MnMoOS are calculated by XPS peak fitting and listed in Table S1.…”

Initiating highly efficient (Bi,Ce)2(O,S)3−xoxysulfide catalysts with rich oxygen vacancies for hydrogen evolutionviaadjusting valence band configuration

“…The oxygen vacancy (V O ) provides active sites that can act as temporary trapping sites for the photo-induced electrons, resulting in a decrease in the electron-hole recombination rate, [35][36][37][38] The oxygen vacancy defect was used as the adsorption site of the H 2 O molecule to result in the formation of active oxygen via oxygen trapping and O-H bond weakening of the adsorbed H 2 O molecule. 23,39,40 There have been a few studies on bimetal-chalcogen catalysts to investigate the improvement of hydrogen evolution by V O . Therefore, it is still a great research topic to understand the close link between V O and hydrogen evolution from bimetal-chalcogen catalysts.…”

Material design for converting an oxidative-type BiVO4 catalyst into a reductive BiV(S,O)4−x sulfo-oxide catalyst for nitrogen photoreduction to ammonia

“…89 The Vo defects also act as an electron capture center and an N 2 adsorption site for trapping N 2 and H 2 O molecules via the electron transfer from the catalyst to elongate the bond length, facilitating the N^N bond weakening. [24][25][26][27][28]90,91 The kinetic mechanism for photocatalytic N 2 xation over BiVOS involves ve steps: 91,92 (I) the BiVOS catalyst is excited to generate electrons in the CB under visible light irradiation. (II) The active Vo traps H 2 O molecules and weakens the O-H bonds of absorbed H 2 O for producing protons.…”

“…86,93 At the same time, the Vo serves as an active site for N 2 adsorption and activation. 94,95 (III) The defective BiVOS structural linkage with Vo and V 4+ assists electron hopping transport between V 4+ 4 V 5+ sites to prolong the electron lifetime, 26,27,96,97 activate adsorbed H 2 O molecules and N 2 molecules, and facilitate the electron ux for N 2 xation. 98 (IV) The adsorbed N 2 molecules on the surface of BiVOS simultaneously accept photo-excited electrons and protons to generate NH 3 , followed by NH 3 release and Vo formation.…”

“…26 Abdeta et al designed a non-stoichiometric and defect-attired Bi 2 Mo 3 (S,O) 12 sulfo-oxide photocatalyst for enhancing the PHER and pollutant reduction. 27 Wu et al created a Z-scheme Mo(S,O)/Co(O,S) catalyst for an efficient PHER and pollutant reduction with these two phases simultaneously adjustable by S-/O-doping to build an appropriate energy band structure. 28 The advantages of bimetal sulfo-oxide-/oxysulfide-based catalysts on boosting catalytic activity by the synergistic effects of two different metals to provide more active reaction sites have been understood.…”