Platinum-Catalyzed Aqueous-Phase Hydrogenation of d-Glucose to d-Sorbitol
Platinum-Catalyzed Aqueous-Phase Hydrogenation of d-Glucose to d-Sorbitol
Authors (6): X. Zhang, L. J. Durndell, M. A. Isaacs, C. M. A. Parlett, A. F. Lee, K. Wilson
Themes: Energy, Transformations
DOI: 10.1021/acscatal.6b02369
Citations: 115
Pub type: article-journal
Pub year: 2016

Publisher: American Chemical Society (ACS)

Issue: 11

License: http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html

Publication date(s): 2016/11/04 (print) 2016/10/05 (online)

Pages: 7409-7417

Volume: 6 Issue: 11

Journal: ACS Catalysis

Link: http://pubs.acs.org/doi/pdf/10.1021/acscatal.6b02369

URL: http://dx.doi.org/10.1021/acscatal.6b02369

Aqueous-phase hydrogenation of d-glucose to d-sorbitol was systematically investigated over silica-supported Pt nanoparticles to elucidate structure–reactivity relations and mechanistic insight. d-Glucose hydrogenation over large Pt particles competes with its isomerization to d-fructose over low-coordination (electron-deficient) Pt sites; d-sorbitol production by the former process was structure insensitive for nanoparticles spanning 3–17 nm, whereas isomerization was favored by smaller particles, with both pathways independent of the choice of fumed silica or mesoporous SBA-15 support. While d-fructose was readily hydrogenated to d-mannitol under the same reaction conditions, the latter underwent minimal isomerization to d-sorbitol, which is, therefore, a direct product of d-glucose ring opening and subsequent hydrogenation of the aldose conformer. d-Sorbitol production was favored by low d-glucose concentrations (<10 wt %), high H2 pressures (>40 bar), and low reaction temperatures (<140 °C), which suppressed undesired polymerization side reactions.

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cs6b02369_si_001.pdf Supl. data for Platinum-Catalyzed Aqueous-Phase Hydrogenation of d-Gluco... 2016


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