Hydrothermally stable, conformal, sulfated zirconia monolayer catalysts for glucose conversion to 5-HMF

Osatiashtiani, Amin, Lee, Adam F., Granollers, Marta, Brown, D. Robert, Olivi, Luca, Morales, Gabriel, Melero, Juan A. and Wilson, Karen (2015). Hydrothermally stable, conformal, sulfated zirconia monolayer catalysts for glucose conversion to 5-HMF. ACS Catalysis, 5 (7), pp. 4345-4352.

Abstract

The grafting and sulfation of zirconia conformal monolayers on SBA-15 to create mesoporous catalysts of tunable solid acid/base character is reported. Conformal zirconia and sulfated zirconia (SZ) materials exhibit both Brönsted and Lewis acidity, with the Brönsted/Lewis acid ratio increasing with film thickness and sulfate content. Grafted zirconia films also exhibit amphoteric character, whose Brönsted/Lewis acid site ratio increases with sulfate loading at the expense of base sites. Bilayer ZrO2/SBA-15 affords an ordered mesoporous material with a high acid site loading upon sulfation and excellent hydrothermal stability. Catalytic performance of SZ/SBA-15 was explored in the aqueous phase conversion of glucose to 5-HMF, delivering a 3-fold enhancement in 5-HMF productivity over nonporous SZ counterparts. The coexistence of accessible solid basic/Lewis acid and Brönsted acid sites in grafted SZ/SBA-15 promotes the respective isomerization of glucose to fructose and dehydration of reactively formed fructose to the desired 5-HMF platform chemical.

Publication DOI: https://doi.org/10.1021/acscatal.5b00965
Divisions: Engineering & Applied Sciences
Engineering & Applied Sciences > Chemical engineering & applied chemistry
Engineering & Applied Sciences > European Bioenergy Research Institute (EBRI)
Additional Information: This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes. Funding: European Union Seventh Framework Programme (FP7/2007-2013) Grant Agreement No. 604307; EPSRC (EP/K014676/1; EP/G007594/4); Royal Society (IF100206); Ministerio de Ciencia e Innovación of Spain (CTQ2011-28216); and Regional Government of Madrid (S2013-MAE-288) Supporting information avaialble online.
Uncontrolled Keywords: SBA-15,solid base,hydrothermal stability,5-HMF,solid acid,sulfated zirconia,Catalysis
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2015-06-17
Authors: Osatiashtiani, Amin ( 0000-0003-1334-127X)
Lee, Adam F. ( 0000-0002-2153-1391)
Granollers, Marta ( 0000-0001-8602-9362)
Brown, D. Robert
Olivi, Luca
Morales, Gabriel
Melero, Juan A.
Wilson, Karen ( 0000-0003-4873-708X)

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