首页|Ultrafine W2C well-dispersed on N-doped graphene:Extraordinary catalyst for ultrafast oxidative desulfurization of high sulfur liquid fuels
Ultrafine W2C well-dispersed on N-doped graphene:Extraordinary catalyst for ultrafast oxidative desulfurization of high sulfur liquid fuels
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NSTL
A ternary nanocomposite comprising phosphotungstic acid(PW_(12)),polyethyleneimine(PEI),and graphene oxide(GO),i.e.,PW_(12)-PEI/GO,was developed as a precursor to obtain the W2C/N-rGO catalyst upon in-situ carbonization.W2C/N-rGO was applied in the deep oxidative desulfurization(ODS)of liquid fuel,and exhibited extraordinary performance due to the ultrafine W2C nanoparticles(~ 3-5 nm)evenly dispersed on N-rGO and the electron-donating effect of N-rGO on W2C 4000 ppm of DBT in model oil could be completely removed within only 10 min with a remarkably high turnover frequency(168 h~(-1))and the lower activation energy(30.9 kJmol~(-1)).Radical experiments and density functional tneory calculations indicate that the ODS reaction proceeds mainly via a HO· radical mechanism.Moreover,W2C/N-TGO could be recycled for 6 successive cycles with no obvious loss of performance.
NSTL
