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A Ship-in-a-Bottle Strategy To Synthesize Encapsulated Intermetallic Nanoparticle Catalysts: Exemplified for Furfural Hydrogenation

TitleA Ship-in-a-Bottle Strategy To Synthesize Encapsulated Intermetallic Nanoparticle Catalysts: Exemplified for Furfural Hydrogenation
Publication TypeJournal Article
Year of Publication2016
AuthorsMaligal-Ganesh, RV, Xiao, CX, Goh, TW, Wang, LL, Gustafson, J, Pei, YC, Qi, ZY, Johnson, DD, Zhang, SR, Tao, F, Huang, WK
JournalAcs Catalysis
Volume6
Pagination1754-1763
Date Published03
Type of ArticleArticle
ISBN Number2155-5435
Accession NumberWOS:000371755500044
Keywordsalcohol, co, conversion, core-shell, gold nanoparticles, green chemistry, Heterogeneous catalysis, hydrogenation, Intermetallic compounds, nanocrystals, oxidation, reaction pathways, selective, shape control, site isolation, solid-state materials, temperature solution synthesis
Abstract

Intermetallic compounds are garnering increasing attention as efficient catalysts for improved selectivity in chemical processes. Here, using a ship-in-a-bottle strategy, we synthesize single-phase platinum-based intermetallic nano particles (NPs) protected by a mesoporous silica (mSiO(2)) shell by heterogeneous reduction and nucleation of Sn, Pb, or Zn in mSiO(2)-encapsulated Pt NPs. For selective hydrogenation of furfural to furfuryl alcohol, a dramatic increase in activity and selectivity is observed when intermetallic NPs catalysts are used in comparison to Pt@mSiO(2). Among the intermetallic NPs, PtSn@mSiO(2), exhibits the best performance, requiring only one-tenth of the quantity of Pt used in Pt@mSiO(2) for similar activity and near 100% selectivity to furfuryl alcohol. A high temperature oxidation reduction treatment easily reverses any carbon deposition-induced catalyst deactivation. X-ray photoelectron spectroscopy shows the importance of surface composition to the activity, whereas density functional theory calculations reveal that the enhanced selectivity on PtSn compared to Pt is due to the different furfural adsorption configurations on the two surfaces.

DOI10.1021/acscatal.5b02281
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