ConsecutiveOxygen-for-Sulfur Exchange Reactions betweenVanadium Oxide Cluster Anions and Hydrogen Sulfide.
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| Title: | ConsecutiveOxygen-for-Sulfur Exchange Reactions betweenVanadium Oxide Cluster Anions and Hydrogen Sulfide. |
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| Authors: | Jia, Mei-Ye1, Xu, Bo1, Deng, Ke1, He, Sheng-Gui1, Ge, Mao-Fa1 |
| Source: | Journal of Physical Chemistry A. Sep2014, Vol. 118 Issue 37, p8106-8114. 9p. |
| Subjects: | Exchange reactions, Vanadium oxide, Metal clusters, Anions, Hydrogen sulfide, Laser ablation, Collisions (Physics) |
| Abstract: | Vanadiumoxide cluster anions Vm16Onâand Vm18Onâwere prepared by laser ablation and reacted withhydrogen sulfide (H2S) in a fast flow reactor under thermalcollision conditions. A time-of-flight mass spectrometer was usedto detect the cluster distributions before and after the interactionswith H2S. The experiments suggest that the oxygen-for-sulfur(O/S) exchange reaction to release water was evidenced in the reactorfor most of the cluster anions: VmOnâ H2S âVmOnâ1Sâ H2O. For reactions of clustersVO3âand VO4âwith H2S, consecutive O/S exchange reactions led to thegeneration of sulfur containing vanadium oxide cluster anions VO3âkSkâ(k= 1â3) and VO4âkSkâ(k= 1â4). Density functional theory calculationswere performed for the reactions of VO3â4âwith H2S, and the results indicate that the O/S exchangereactions are both thermodynamically and kinetically favorable, whichsupports the experimental observations. The reactions of VmOn牛겵cations with H2S have been reported previously (Jia, M.-Y.; Xu, B.; Ding, X.-L.; Zhao, Y.-X.; He, S.-G.; Ge, M.-F.J. Phys. Chem. C2012, 116, 9043), and this study of cluster anionsprovides further new insights into the transformations of H2S over vanadium oxides at the molecular level. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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