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Catalytic hydrogenation and hydrodeoxygenation of Furfural over Pt(111): A model system for the rational design and operation of practical biomass conversion catalysts

Taylor, Martin J.; Jiang, Li; Reichert, Joachim; Papageorgiou, Anthoula C.; Beaumont, Simon K.; Wilson, Karen; Lee, Adam F.; Barth, Johannes V.; Kyriakou, Georgios

Authors

Li Jiang

Joachim Reichert

Anthoula C. Papageorgiou

Simon K. Beaumont

Karen Wilson

Adam F. Lee

Johannes V. Barth

Georgios Kyriakou



Abstract

Furfural is a key bioderived platform chemical whose reactivity under hydrogen atmospheres affords diverse chemical intermediates. Here, temperature-programmed reaction spectrometry and complementary scanning tunneling microscopy (STM) are employed to investigate furfural adsorption and reactivity over a Pt(111) model catalyst. Furfural decarbonylation to furan is highly sensitive to reaction conditions, in particular, surface crowding and associated changes in the adsorption geometry: furfural adopts a planar geometry on clean Pt(111) at low coverage, tilting at higher coverage to form a densely packed furfural adlayer. This switch in adsorption geometry strongly influences product selectivity. STM reveals the formation of hydrogen-bonded networks for planar furfural, which favor decarbonylation on clean Pt(111) and hydrogenolysis in the presence of coadsorbed hydrogen. Preadsorbed hydrogen promotes furfural hydrogenation to furfuryl alcohol and its subsequent hydrogenolysis to methyl furan, while suppressing residual surface carbon. Furfural chemistry over Pt is markedly different from that over Pd, with weaker adsorption over the former affording a simpler product distribution than the latter; Pd catalyzes a wider range of chemistry, including ring-opening to form propene. Insight into the role of molecular orientation in controlling product selectivity will guide the design and operation of more selective and stable Pt catalysts for furfural hydrogenation.

Journal Article Type Article
Publication Date Apr 20, 2017
Journal Journal of Physical Chemistry C
Print ISSN 1932-7447
Electronic ISSN 1932-7455
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 121
Issue 15
Pages 8490-8497
APA6 Citation Taylor, M. J., Jiang, L., Reichert, J., Papageorgiou, A. C., Beaumont, S. K., Wilson, K., …Kyriakou, G. (2017). Catalytic hydrogenation and hydrodeoxygenation of Furfural over Pt(111): A model system for the rational design and operation of practical biomass conversion catalysts. Journal of physical chemistry. C, 121(15), 8490-8497. https://doi.org/10.1021/acs.jpcc.7b01744
DOI https://doi.org/10.1021/acs.jpcc.7b01744
Publisher URL https://pubs.acs.org/doi/10.1021/acs.jpcc.7b01744

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ACS AuthorChoice - This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.



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