Details

Autor(en) / Beteiligte

• Shi, Yingzhang
• Wang, Zhiwen
• Liu, Cheng
• Wu, Tai kang
• Liu, Rui
• Wu, Ling

Titel

Surface synergetic effects of Pt clusters/monolayer Bi2MoO6 nanosheet for promoting the photocatalytic selective reduction of 4-nitrostyrene to 4-vinylaniline

Ist Teil von

• Applied catalysis. B, Environmental, 2022-05, Vol.304, p.121010, Article 121010

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• Pt clusters supported on monolayer Bi2MoO6 nanosheets (Pt/BMO-NS) are constructed for the photocatalytic selective reduction of 4-nitrostyrene to 4-vinylaniline in the presence of HCOONH4 and exhibit high conversion (≈100%) of 4-nitrostyrene and high selectivity (≈100%) of 4-vinylaniline. In situ FTIR spectra and XPS spectra of BMO-NS absorbed 4-nitrostyrene further demonstrate that 4-nitrostyrene can be selectively absorbed and activated on surface Mo5+ and Bi2+ sites of BMO-NS via the Bi···O-N or Mo···O-N coordination. The Pt clusters and photogenerated carriers synergistically make the efficient dissociation of HCOO- to form rich ·CO2- and active ·H, greatly supporting the selective reduction of 4-nitrostyrene to 4-vinyaniline. This work not only highlights the complete utilization of photo-generated carriers to achieve the selective reduction of 4-nitrostyrene to 4-vinylaniline via photocatalytic hydrogen transfer, but also uses metal/monolayer nanosheets as a molecule platform to deeply study the surface/interface synergetic mechanism at the molecule level. [Display omitted] Efficient selective reduction of 4-nitrostyrene to 4-vinylaniline over Pt/BMO-NS via photocatalytic hydrogen transfer. •Pt clusters decorated monolayer Bi2MoO6 nanosheets (Pt/BMO-NS) with surface Bi2+ and Mo5+ sites are constructed.•The Pt/BMO-NS exhibits near 100% conversion of 4-nitrostyrene and near 100% selectivity of 4-vinylaniline under visible light.•The surface Bi2+ and Mo5+ sites as nucleophilic sites could selective absorb and activate the electron-deficient –NO2 group.•The photo-generated carriers are completely utilized to make the efficient dissociation of HCOO- to form rich·CO2- and active H.