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Article
Selective Alcohol Dehydrogenation and Hydrogenolysis with Semiconductor-Metal Photocatalysts: Toward Solar-to-Chemical Energy Conversion of Biomass-Relevant Substrates
Journal of Physical Chemistry Letters
  • Thanthirige Purnima Anuththara Ruberu, Iowa State University
  • Nicholas C. Nelson, Iowa State University
  • Igor Iván Slowing, Iowa State University
  • Javier Vela, Iowa State University
Document Type
Article
Disciplines
Publication Version
Published Version
Publication Date
9-13-2012
DOI
10.1021/jz301309d
Abstract

Photocatalytic conversion of biomass is a potentially transformative concept in renewable energy. Dehydrogenation and hydrogenolysis of biomass-derived alcohols can produce renewable fuels such as H 2 and hydrocarbons, respectively. We have successfully used semiconductor-metal heterostructures for sunlight-driven dehydrogenation and hydrogenolysis of benzyl alcohol. The heterostructure composition dictates activity, product distribution, and turnovers. A few metal (M = Pt, Pd) islands on the semiconductor (SC) surface significantly enhance activity and selectivity and also greatly stabilize the SC against photoinduced etching and degradation. Under selected conditions, CdS-Pt favors dehydrogenation (H 2) over hydrogenolysis (toluene) 8:1, whereas CdS 0.4Se 0.6-Pd favors hydrogenolysis over dehydrogenation 3:1. Photochemically generated, surface-adsorbed hydrogen is useful in tandem catalysis, for example, via transfer hydrogenation. We expect this work will lead to new paradigms for sunlight-driven conversions of biomass-relevant substrates.

Comments

Reprinted (adapted) with permission from Journal of Physical Chemistry Letters 3 (2012): 2798, doi:10.1021/jz301309d. Copyright 2012 American Chemical Society.

Copyright Owner
American Chemical Society
Language
en
File Format
application/pdf
Citation Information
Thanthirige Purnima Anuththara Ruberu, Nicholas C. Nelson, Igor Iván Slowing and Javier Vela. "Selective Alcohol Dehydrogenation and Hydrogenolysis with Semiconductor-Metal Photocatalysts: Toward Solar-to-Chemical Energy Conversion of Biomass-Relevant Substrates" Journal of Physical Chemistry Letters Vol. 3 Iss. 19 (2012) p. 2798 - 2802
Available at: http://works.bepress.com/igor_slowing/1/